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-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/animate.js60
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/fromauto-leftA-widthA-rightN.html19
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/fromauto-leftA-widthN-rightA.html19
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/fromauto-leftA-widthN-rightN.html19
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/fromauto-leftN-widthA-rightA-2.html19
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/fromauto-leftN-widthA-rightA.html19
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/fromauto-leftN-widthA-rightN-2.html19
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/fromauto-leftN-widthA-rightN.html19
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/fromauto-leftN-widthN-rightA.html19
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/leftA-widthA-rightN-ref.html15
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/leftA-widthA-rightN.html19
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/leftA-widthN-rightA-ref.html15
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/leftA-widthN-rightA.html19
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/leftA-widthN-rightN-ref.html15
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/leftA-widthN-rightN.html19
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightA-2-ref.html15
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightA-2.html19
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightA-ref.html15
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightA.html19
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightN-2-ref.html15
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightN-2.html19
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightN-ref.html15
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightN.html19
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/leftN-widthN-rightA-ref.html15
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/leftN-widthN-rightA.html19
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/reftest.list18
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/reftest_border_abspos.list25
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/reftest_border_parent.list26
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/reftest_margin_abspos.list26
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/reftest_margin_parent.list26
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/reftest_padding_abspos.list26
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/reftest_padding_parent.list26
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/reftest_plain.list26
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/style.css20
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/toauto-leftA-widthA-rightN-ref.html15
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/toauto-leftA-widthA-rightN.html19
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/toauto-leftA-widthN-rightA-ref.html15
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/toauto-leftA-widthN-rightA.html19
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/toauto-leftA-widthN-rightN-ref.html15
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/toauto-leftA-widthN-rightN.html19
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightA-2-ref.html15
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightA-2.html19
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightA-ref.html15
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightA.html19
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightN-2-ref.html15
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightN-2.html19
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightN-ref.html15
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightN.html19
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthN-rightA-ref.html15
-rw-r--r--layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthN-rightA.html19
50 files changed, 975 insertions, 0 deletions
diff --git a/layout/reftests/position-dynamic-changes/horizontal/animate.js b/layout/reftests/position-dynamic-changes/horizontal/animate.js
new file mode 100644
index 0000000000..142004743f
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/animate.js
@@ -0,0 +1,60 @@
+var currentOffset = null;
+var maxOffset = null;
+var property = "left";
+
+var rfa = null;
+if (window.requestAnimationFrame) {
+ rfa = requestAnimationFrame;
+} else if (window.webkitRequestAnimationFrame) {
+ rfa = webkitRequestAnimationFrame;
+} else if (window.msRequestAnimationFrame) {
+ rfa = msRequestAnimationFrame;
+} else if (window.oRequestAnimationFrame) {
+ rfa = oRequestAnimationFrame;
+}
+
+function animate(from, to, prop) {
+ currentOffset = from;
+ maxOffset = to;
+ if (prop) {
+ property = prop;
+ }
+ rfa(animateStep);
+}
+
+function animateStep() {
+ if (currentOffset <= maxOffset) {
+ document.getElementById("child").style[property] = currentOffset + "px";
+ currentOffset += 10;
+ rfa(animateStep);
+ } else {
+ document.documentElement.removeAttribute("class");
+ }
+}
+
+function toAuto(prop) {
+ if (prop) {
+ property = prop;
+ }
+ rfa(setToAuto);
+}
+
+function setToAuto() {
+ document.getElementById("child").style[property] = "auto";
+ document.documentElement.removeAttribute("class");
+}
+
+function fromAuto(to, prop) {
+ maxOffset = to;
+ if (prop) {
+ property = prop;
+ }
+ rfa(setFromAuto);
+}
+
+function setFromAuto() {
+ document.getElementById("child").style[property] = maxOffset + "px";
+ document.documentElement.removeAttribute("class");
+}
+
+
diff --git a/layout/reftests/position-dynamic-changes/horizontal/fromauto-leftA-widthA-rightN.html b/layout/reftests/position-dynamic-changes/horizontal/fromauto-leftA-widthA-rightN.html
new file mode 100644
index 0000000000..95f01aff41
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/fromauto-leftA-widthA-rightN.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="animate.js" type="text/javascript"></script>
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ <script>
+ fromAuto(200, "right");
+ </script>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/fromauto-leftA-widthN-rightA.html b/layout/reftests/position-dynamic-changes/horizontal/fromauto-leftA-widthN-rightA.html
new file mode 100644
index 0000000000..49bb65de3a
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/fromauto-leftA-widthN-rightA.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="animate.js" type="text/javascript"></script>
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ <script>
+ fromAuto(200, "width");
+ </script>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/fromauto-leftA-widthN-rightN.html b/layout/reftests/position-dynamic-changes/horizontal/fromauto-leftA-widthN-rightN.html
new file mode 100644
index 0000000000..c63a914f35
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/fromauto-leftA-widthN-rightN.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="animate.js" type="text/javascript"></script>
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="width: 100px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ <script>
+ fromAuto(200, "right");
+ </script>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/fromauto-leftN-widthA-rightA-2.html b/layout/reftests/position-dynamic-changes/horizontal/fromauto-leftN-widthA-rightA-2.html
new file mode 100644
index 0000000000..5c7eed756b
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/fromauto-leftN-widthA-rightA-2.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="animate.js" type="text/javascript"></script>
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ <script>
+ fromAuto(360);
+ </script>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/fromauto-leftN-widthA-rightA.html b/layout/reftests/position-dynamic-changes/horizontal/fromauto-leftN-widthA-rightA.html
new file mode 100644
index 0000000000..bb48f92bcc
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/fromauto-leftN-widthA-rightA.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="animate.js" type="text/javascript"></script>
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ <script>
+ fromAuto(200);
+ </script>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/fromauto-leftN-widthA-rightN-2.html b/layout/reftests/position-dynamic-changes/horizontal/fromauto-leftN-widthA-rightN-2.html
new file mode 100644
index 0000000000..b7e3e45a51
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/fromauto-leftN-widthA-rightN-2.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="animate.js" type="text/javascript"></script>
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="right: 20px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ <script>
+ fromAuto(340);
+ </script>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/fromauto-leftN-widthA-rightN.html b/layout/reftests/position-dynamic-changes/horizontal/fromauto-leftN-widthA-rightN.html
new file mode 100644
index 0000000000..29caa7bbf4
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/fromauto-leftN-widthA-rightN.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="animate.js" type="text/javascript"></script>
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="right: 20px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ <script>
+ fromAuto(200);
+ </script>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/fromauto-leftN-widthN-rightA.html b/layout/reftests/position-dynamic-changes/horizontal/fromauto-leftN-widthN-rightA.html
new file mode 100644
index 0000000000..8a9b6a9d47
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/fromauto-leftN-widthN-rightA.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="animate.js" type="text/javascript"></script>
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="width: 100px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ <script>
+ fromAuto(200);
+ </script>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/leftA-widthA-rightN-ref.html b/layout/reftests/position-dynamic-changes/horizontal/leftA-widthA-rightN-ref.html
new file mode 100644
index 0000000000..88780e4778
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/leftA-widthA-rightN-ref.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="right: 200px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/leftA-widthA-rightN.html b/layout/reftests/position-dynamic-changes/horizontal/leftA-widthA-rightN.html
new file mode 100644
index 0000000000..14014d03e8
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/leftA-widthA-rightN.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="animate.js" type="text/javascript"></script>
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="right: 100px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ <script>
+ animate(100, 200, "right");
+ </script>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/leftA-widthN-rightA-ref.html b/layout/reftests/position-dynamic-changes/horizontal/leftA-widthN-rightA-ref.html
new file mode 100644
index 0000000000..f35b1119b9
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/leftA-widthN-rightA-ref.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="width: 200px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/leftA-widthN-rightA.html b/layout/reftests/position-dynamic-changes/horizontal/leftA-widthN-rightA.html
new file mode 100644
index 0000000000..c73e85c335
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/leftA-widthN-rightA.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="animate.js" type="text/javascript"></script>
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="width: 100px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ <script>
+ animate(100, 200, "width");
+ </script>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/leftA-widthN-rightN-ref.html b/layout/reftests/position-dynamic-changes/horizontal/leftA-widthN-rightN-ref.html
new file mode 100644
index 0000000000..4db64f3746
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/leftA-widthN-rightN-ref.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="width: 100px; right: 200px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/leftA-widthN-rightN.html b/layout/reftests/position-dynamic-changes/horizontal/leftA-widthN-rightN.html
new file mode 100644
index 0000000000..4dcea54842
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/leftA-widthN-rightN.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="animate.js" type="text/javascript"></script>
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="width: 100px; right: 100px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ <script>
+ animate(100, 200, "right");
+ </script>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightA-2-ref.html b/layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightA-2-ref.html
new file mode 100644
index 0000000000..33b21d8f12
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightA-2-ref.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="left: 360px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightA-2.html b/layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightA-2.html
new file mode 100644
index 0000000000..5476f217b9
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightA-2.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="animate.js" type="text/javascript"></script>
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="left: 200px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ <script>
+ animate(200, 360);
+ </script>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightA-ref.html b/layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightA-ref.html
new file mode 100644
index 0000000000..7e8cc0fdef
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightA-ref.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="left: 200px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightA.html b/layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightA.html
new file mode 100644
index 0000000000..60d01178fb
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightA.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="animate.js" type="text/javascript"></script>
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="left: 100px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ <script>
+ animate(100, 200);
+ </script>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightN-2-ref.html b/layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightN-2-ref.html
new file mode 100644
index 0000000000..5080662fb0
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightN-2-ref.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="left: 340px; right: 20px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightN-2.html b/layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightN-2.html
new file mode 100644
index 0000000000..d12d7a917a
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightN-2.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="animate.js" type="text/javascript"></script>
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="left: 100px; right: 20px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ <script>
+ animate(100, 340);
+ </script>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightN-ref.html b/layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightN-ref.html
new file mode 100644
index 0000000000..a0847ba87b
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightN-ref.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="left: 200px; right: 20px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightN.html b/layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightN.html
new file mode 100644
index 0000000000..bedd5e21df
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/leftN-widthA-rightN.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="animate.js" type="text/javascript"></script>
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="left: 100px; right: 20px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ <script>
+ animate(100, 200);
+ </script>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/leftN-widthN-rightA-ref.html b/layout/reftests/position-dynamic-changes/horizontal/leftN-widthN-rightA-ref.html
new file mode 100644
index 0000000000..4f885402dd
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/leftN-widthN-rightA-ref.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="width: 100px; left: 200px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/leftN-widthN-rightA.html b/layout/reftests/position-dynamic-changes/horizontal/leftN-widthN-rightA.html
new file mode 100644
index 0000000000..5928cd7b68
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/leftN-widthN-rightA.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="animate.js" type="text/javascript"></script>
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="width: 100px; left: 100px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ <script>
+ animate(100, 200);
+ </script>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/reftest.list b/layout/reftests/position-dynamic-changes/horizontal/reftest.list
new file mode 100644
index 0000000000..5f888a3ad8
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/reftest.list
@@ -0,0 +1,18 @@
+# This directory includes 7 different permutations of the same tests.
+# reftest_plain.list is the manifest file for tests without any border, margin
+# or padding applied to either the abs-pos element or the parent.
+# reftest_{prop}_{element}.list files are the manifest files for tests with the
+# CSS property {prop} applied to {element}. These files use the query string
+# on the test file and the reference file to ask the code in ../handleprop.js add
+# the corresponding CSS style.
+
+# Any changes to the contents of the following files needs to be reflected on
+# all of them.
+
+include reftest_plain.list
+include reftest_border_abspos.list
+include reftest_border_parent.list
+include reftest_margin_abspos.list
+include reftest_margin_parent.list
+include reftest_padding_abspos.list
+include reftest_padding_parent.list
diff --git a/layout/reftests/position-dynamic-changes/horizontal/reftest_border_abspos.list b/layout/reftests/position-dynamic-changes/horizontal/reftest_border_abspos.list
new file mode 100644
index 0000000000..6555d3275b
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/reftest_border_abspos.list
@@ -0,0 +1,25 @@
+# Please see the comment at the beginning of reftest.list
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightA.html?border_abspos leftN-widthA-rightA-ref.html?border_abspos
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightA-2.html?border_abspos leftN-widthA-rightA-2-ref.html?border_abspos
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightN.html?border_abspos leftN-widthA-rightN-ref.html?border_abspos
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightN-2.html?border_abspos leftN-widthA-rightN-2-ref.html?border_abspos
+fuzzy-if(geckoview,0-2,0-1382) == leftA-widthN-rightA.html?border_abspos leftA-widthN-rightA-ref.html?border_abspos
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthN-rightA.html?border_abspos leftN-widthN-rightA-ref.html?border_abspos
+fuzzy-if(geckoview,0-2,0-1382) == leftA-widthN-rightN.html?border_abspos leftA-widthN-rightN-ref.html?border_abspos
+fuzzy-if(geckoview,0-2,0-1382) == leftA-widthA-rightN.html?border_abspos leftA-widthA-rightN-ref.html?border_abspos
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightA.html?border_abspos toauto-leftN-widthA-rightA-ref.html?border_abspos
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightA-2.html?border_abspos toauto-leftN-widthA-rightA-2-ref.html?border_abspos
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightN.html?border_abspos toauto-leftN-widthA-rightN-ref.html?border_abspos
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightN-2.html?border_abspos toauto-leftN-widthA-rightN-2-ref.html?border_abspos
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftA-widthN-rightA.html?border_abspos toauto-leftA-widthN-rightA-ref.html?border_abspos
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthN-rightA.html?border_abspos toauto-leftN-widthN-rightA-ref.html?border_abspos
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftA-widthN-rightN.html?border_abspos toauto-leftA-widthN-rightN-ref.html?border_abspos
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftA-widthA-rightN.html?border_abspos toauto-leftA-widthA-rightN-ref.html?border_abspos
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightA.html?border_abspos leftN-widthA-rightA-ref.html?border_abspos
+random-if(cocoaWidget) fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightA-2.html?border_abspos leftN-widthA-rightA-2-ref.html?border_abspos # Bug 688545
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightN.html?border_abspos leftN-widthA-rightN-ref.html?border_abspos
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightN-2.html?border_abspos leftN-widthA-rightN-2-ref.html?border_abspos
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftA-widthN-rightA.html?border_abspos leftA-widthN-rightA-ref.html?border_abspos
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthN-rightA.html?border_abspos leftN-widthN-rightA-ref.html?border_abspos
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftA-widthN-rightN.html?border_abspos leftA-widthN-rightN-ref.html?border_abspos
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftA-widthA-rightN.html?border_abspos leftA-widthA-rightN-ref.html?border_abspos
diff --git a/layout/reftests/position-dynamic-changes/horizontal/reftest_border_parent.list b/layout/reftests/position-dynamic-changes/horizontal/reftest_border_parent.list
new file mode 100644
index 0000000000..d7be02f1f1
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/reftest_border_parent.list
@@ -0,0 +1,26 @@
+# Please see the comment at the beginning of reftest.list
+
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightA.html?border_parent leftN-widthA-rightA-ref.html?border_parent
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightA-2.html?border_parent leftN-widthA-rightA-2-ref.html?border_parent
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightN.html?border_parent leftN-widthA-rightN-ref.html?border_parent
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightN-2.html?border_parent leftN-widthA-rightN-2-ref.html?border_parent
+fuzzy-if(geckoview,0-2,0-1382) == leftA-widthN-rightA.html?border_parent leftA-widthN-rightA-ref.html?border_parent
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthN-rightA.html?border_parent leftN-widthN-rightA-ref.html?border_parent
+fuzzy-if(geckoview,0-2,0-1382) == leftA-widthN-rightN.html?border_parent leftA-widthN-rightN-ref.html?border_parent
+fuzzy-if(geckoview,0-2,0-1382) == leftA-widthA-rightN.html?border_parent leftA-widthA-rightN-ref.html?border_parent
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightA.html?border_parent toauto-leftN-widthA-rightA-ref.html?border_parent
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightA-2.html?border_parent toauto-leftN-widthA-rightA-2-ref.html?border_parent
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightN.html?border_parent toauto-leftN-widthA-rightN-ref.html?border_parent
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightN-2.html?border_parent toauto-leftN-widthA-rightN-2-ref.html?border_parent
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftA-widthN-rightA.html?border_parent toauto-leftA-widthN-rightA-ref.html?border_parent
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthN-rightA.html?border_parent toauto-leftN-widthN-rightA-ref.html?border_parent
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftA-widthN-rightN.html?border_parent toauto-leftA-widthN-rightN-ref.html?border_parent
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftA-widthA-rightN.html?border_parent toauto-leftA-widthA-rightN-ref.html?border_parent
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightA.html?border_parent leftN-widthA-rightA-ref.html?border_parent
+random-if(cocoaWidget) fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightA-2.html?border_parent leftN-widthA-rightA-2-ref.html?border_parent # Bug 688545
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightN.html?border_parent leftN-widthA-rightN-ref.html?border_parent
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightN-2.html?border_parent leftN-widthA-rightN-2-ref.html?border_parent
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftA-widthN-rightA.html?border_parent leftA-widthN-rightA-ref.html?border_parent
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthN-rightA.html?border_parent leftN-widthN-rightA-ref.html?border_parent
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftA-widthN-rightN.html?border_parent leftA-widthN-rightN-ref.html?border_parent
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftA-widthA-rightN.html?border_parent leftA-widthA-rightN-ref.html?border_parent
diff --git a/layout/reftests/position-dynamic-changes/horizontal/reftest_margin_abspos.list b/layout/reftests/position-dynamic-changes/horizontal/reftest_margin_abspos.list
new file mode 100644
index 0000000000..4e9d1051d5
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/reftest_margin_abspos.list
@@ -0,0 +1,26 @@
+# Please see the comment at the beginning of reftest.list
+
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightA.html?margin_abspos leftN-widthA-rightA-ref.html?margin_abspos
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightA-2.html?margin_abspos leftN-widthA-rightA-2-ref.html?margin_abspos
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightN.html?margin_abspos leftN-widthA-rightN-ref.html?margin_abspos
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightN-2.html?margin_abspos leftN-widthA-rightN-2-ref.html?margin_abspos
+fuzzy-if(geckoview,0-2,0-1382) == leftA-widthN-rightA.html?margin_abspos leftA-widthN-rightA-ref.html?margin_abspos
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthN-rightA.html?margin_abspos leftN-widthN-rightA-ref.html?margin_abspos
+fuzzy-if(geckoview,0-2,0-1382) == leftA-widthN-rightN.html?margin_abspos leftA-widthN-rightN-ref.html?margin_abspos
+fuzzy-if(geckoview,0-2,0-1382) == leftA-widthA-rightN.html?margin_abspos leftA-widthA-rightN-ref.html?margin_abspos
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightA.html?margin_abspos toauto-leftN-widthA-rightA-ref.html?margin_abspos
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightA-2.html?margin_abspos toauto-leftN-widthA-rightA-2-ref.html?margin_abspos
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightN.html?margin_abspos toauto-leftN-widthA-rightN-ref.html?margin_abspos
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightN-2.html?margin_abspos toauto-leftN-widthA-rightN-2-ref.html?margin_abspos
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftA-widthN-rightA.html?margin_abspos toauto-leftA-widthN-rightA-ref.html?margin_abspos
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthN-rightA.html?margin_abspos toauto-leftN-widthN-rightA-ref.html?margin_abspos
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftA-widthN-rightN.html?margin_abspos toauto-leftA-widthN-rightN-ref.html?margin_abspos
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftA-widthA-rightN.html?margin_abspos toauto-leftA-widthA-rightN-ref.html?margin_abspos
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightA.html?margin_abspos leftN-widthA-rightA-ref.html?margin_abspos
+random-if(cocoaWidget) fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightA-2.html?margin_abspos leftN-widthA-rightA-2-ref.html?margin_abspos # Bug 688545
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightN.html?margin_abspos leftN-widthA-rightN-ref.html?margin_abspos
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightN-2.html?margin_abspos leftN-widthA-rightN-2-ref.html?margin_abspos
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftA-widthN-rightA.html?margin_abspos leftA-widthN-rightA-ref.html?margin_abspos
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthN-rightA.html?margin_abspos leftN-widthN-rightA-ref.html?margin_abspos
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftA-widthN-rightN.html?margin_abspos leftA-widthN-rightN-ref.html?margin_abspos
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftA-widthA-rightN.html?margin_abspos leftA-widthA-rightN-ref.html?margin_abspos
diff --git a/layout/reftests/position-dynamic-changes/horizontal/reftest_margin_parent.list b/layout/reftests/position-dynamic-changes/horizontal/reftest_margin_parent.list
new file mode 100644
index 0000000000..07320fa04b
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/reftest_margin_parent.list
@@ -0,0 +1,26 @@
+# Please see the comment at the beginning of reftest.list
+
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightA.html?margin_parent leftN-widthA-rightA-ref.html?margin_parent
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightA-2.html?margin_parent leftN-widthA-rightA-2-ref.html?margin_parent
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightN.html?margin_parent leftN-widthA-rightN-ref.html?margin_parent
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightN-2.html?margin_parent leftN-widthA-rightN-2-ref.html?margin_parent
+fuzzy-if(geckoview,0-2,0-1382) == leftA-widthN-rightA.html?margin_parent leftA-widthN-rightA-ref.html?margin_parent
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthN-rightA.html?margin_parent leftN-widthN-rightA-ref.html?margin_parent
+fuzzy-if(geckoview,0-2,0-1382) == leftA-widthN-rightN.html?margin_parent leftA-widthN-rightN-ref.html?margin_parent
+fuzzy-if(geckoview,0-2,0-1382) == leftA-widthA-rightN.html?margin_parent leftA-widthA-rightN-ref.html?margin_parent
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightA.html?margin_parent toauto-leftN-widthA-rightA-ref.html?margin_parent
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightA-2.html?margin_parent toauto-leftN-widthA-rightA-2-ref.html?margin_parent
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightN.html?margin_parent toauto-leftN-widthA-rightN-ref.html?margin_parent
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightN-2.html?margin_parent toauto-leftN-widthA-rightN-2-ref.html?margin_parent
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftA-widthN-rightA.html?margin_parent toauto-leftA-widthN-rightA-ref.html?margin_parent
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthN-rightA.html?margin_parent toauto-leftN-widthN-rightA-ref.html?margin_parent
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftA-widthN-rightN.html?margin_parent toauto-leftA-widthN-rightN-ref.html?margin_parent
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftA-widthA-rightN.html?margin_parent toauto-leftA-widthA-rightN-ref.html?margin_parent
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightA.html?margin_parent leftN-widthA-rightA-ref.html?margin_parent
+random-if(cocoaWidget) fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightA-2.html?margin_parent leftN-widthA-rightA-2-ref.html?margin_parent # Bug 688545
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightN.html?margin_parent leftN-widthA-rightN-ref.html?margin_parent
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightN-2.html?margin_parent leftN-widthA-rightN-2-ref.html?margin_parent
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftA-widthN-rightA.html?margin_parent leftA-widthN-rightA-ref.html?margin_parent
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthN-rightA.html?margin_parent leftN-widthN-rightA-ref.html?margin_parent
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftA-widthN-rightN.html?margin_parent leftA-widthN-rightN-ref.html?margin_parent
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftA-widthA-rightN.html?margin_parent leftA-widthA-rightN-ref.html?margin_parent
diff --git a/layout/reftests/position-dynamic-changes/horizontal/reftest_padding_abspos.list b/layout/reftests/position-dynamic-changes/horizontal/reftest_padding_abspos.list
new file mode 100644
index 0000000000..9e7173fc77
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/reftest_padding_abspos.list
@@ -0,0 +1,26 @@
+# Please see the comment at the beginning of reftest.list
+
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightA.html?padding_abspos leftN-widthA-rightA-ref.html?padding_abspos
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightA-2.html?padding_abspos leftN-widthA-rightA-2-ref.html?padding_abspos
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightN.html?padding_abspos leftN-widthA-rightN-ref.html?padding_abspos
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightN-2.html?padding_abspos leftN-widthA-rightN-2-ref.html?padding_abspos
+fuzzy-if(geckoview,0-2,0-1382) == leftA-widthN-rightA.html?padding_abspos leftA-widthN-rightA-ref.html?padding_abspos
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthN-rightA.html?padding_abspos leftN-widthN-rightA-ref.html?padding_abspos
+fuzzy-if(geckoview,0-2,0-1382) == leftA-widthN-rightN.html?padding_abspos leftA-widthN-rightN-ref.html?padding_abspos
+fuzzy-if(geckoview,0-2,0-1382) == leftA-widthA-rightN.html?padding_abspos leftA-widthA-rightN-ref.html?padding_abspos
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightA.html?padding_abspos toauto-leftN-widthA-rightA-ref.html?padding_abspos
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightA-2.html?padding_abspos toauto-leftN-widthA-rightA-2-ref.html?padding_abspos
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightN.html?padding_abspos toauto-leftN-widthA-rightN-ref.html?padding_abspos
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightN-2.html?padding_abspos toauto-leftN-widthA-rightN-2-ref.html?padding_abspos
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftA-widthN-rightA.html?padding_abspos toauto-leftA-widthN-rightA-ref.html?padding_abspos
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthN-rightA.html?padding_abspos toauto-leftN-widthN-rightA-ref.html?padding_abspos
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftA-widthN-rightN.html?padding_abspos toauto-leftA-widthN-rightN-ref.html?padding_abspos
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftA-widthA-rightN.html?padding_abspos toauto-leftA-widthA-rightN-ref.html?padding_abspos
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightA.html?padding_abspos leftN-widthA-rightA-ref.html?padding_abspos
+random-if(cocoaWidget) fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightA-2.html?padding_abspos leftN-widthA-rightA-2-ref.html?padding_abspos # Bug 688545
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightN.html?padding_abspos leftN-widthA-rightN-ref.html?padding_abspos
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightN-2.html?padding_abspos leftN-widthA-rightN-2-ref.html?padding_abspos
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftA-widthN-rightA.html?padding_abspos leftA-widthN-rightA-ref.html?padding_abspos
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthN-rightA.html?padding_abspos leftN-widthN-rightA-ref.html?padding_abspos
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftA-widthN-rightN.html?padding_abspos leftA-widthN-rightN-ref.html?padding_abspos
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftA-widthA-rightN.html?padding_abspos leftA-widthA-rightN-ref.html?padding_abspos
diff --git a/layout/reftests/position-dynamic-changes/horizontal/reftest_padding_parent.list b/layout/reftests/position-dynamic-changes/horizontal/reftest_padding_parent.list
new file mode 100644
index 0000000000..b1f81a8da1
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/reftest_padding_parent.list
@@ -0,0 +1,26 @@
+# Please see the comment at the beginning of reftest.list
+
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightA.html?padding_parent leftN-widthA-rightA-ref.html?padding_parent
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightA-2.html?padding_parent leftN-widthA-rightA-2-ref.html?padding_parent
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightN.html?padding_parent leftN-widthA-rightN-ref.html?padding_parent
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightN-2.html?padding_parent leftN-widthA-rightN-2-ref.html?padding_parent
+fuzzy-if(geckoview,0-2,0-1382) == leftA-widthN-rightA.html?padding_parent leftA-widthN-rightA-ref.html?padding_parent
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthN-rightA.html?padding_parent leftN-widthN-rightA-ref.html?padding_parent
+fuzzy-if(geckoview,0-2,0-1382) == leftA-widthN-rightN.html?padding_parent leftA-widthN-rightN-ref.html?padding_parent
+fuzzy-if(geckoview,0-2,0-1382) == leftA-widthA-rightN.html?padding_parent leftA-widthA-rightN-ref.html?padding_parent
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightA.html?padding_parent toauto-leftN-widthA-rightA-ref.html?padding_parent
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightA-2.html?padding_parent toauto-leftN-widthA-rightA-2-ref.html?padding_parent
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightN.html?padding_parent toauto-leftN-widthA-rightN-ref.html?padding_parent
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightN-2.html?padding_parent toauto-leftN-widthA-rightN-2-ref.html?padding_parent
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftA-widthN-rightA.html?padding_parent toauto-leftA-widthN-rightA-ref.html?padding_parent
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthN-rightA.html?padding_parent toauto-leftN-widthN-rightA-ref.html?padding_parent
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftA-widthN-rightN.html?padding_parent toauto-leftA-widthN-rightN-ref.html?padding_parent
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftA-widthA-rightN.html?padding_parent toauto-leftA-widthA-rightN-ref.html?padding_parent
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightA.html?padding_parent leftN-widthA-rightA-ref.html?padding_parent
+random-if(cocoaWidget) fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightA-2.html?padding_parent leftN-widthA-rightA-2-ref.html?padding_parent # Bug 688545
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightN.html?padding_parent leftN-widthA-rightN-ref.html?padding_parent
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightN-2.html?padding_parent leftN-widthA-rightN-2-ref.html?padding_parent
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftA-widthN-rightA.html?padding_parent leftA-widthN-rightA-ref.html?padding_parent
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthN-rightA.html?padding_parent leftN-widthN-rightA-ref.html?padding_parent
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftA-widthN-rightN.html?padding_parent leftA-widthN-rightN-ref.html?padding_parent
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftA-widthA-rightN.html?padding_parent leftA-widthA-rightN-ref.html?padding_parent
diff --git a/layout/reftests/position-dynamic-changes/horizontal/reftest_plain.list b/layout/reftests/position-dynamic-changes/horizontal/reftest_plain.list
new file mode 100644
index 0000000000..2d9e5ba3e3
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/reftest_plain.list
@@ -0,0 +1,26 @@
+# Please see the comment at the beginning of reftest.list
+
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightA.html leftN-widthA-rightA-ref.html
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightA-2.html leftN-widthA-rightA-2-ref.html
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightN.html leftN-widthA-rightN-ref.html
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthA-rightN-2.html leftN-widthA-rightN-2-ref.html
+fuzzy-if(geckoview,0-2,0-1382) == leftA-widthN-rightA.html leftA-widthN-rightA-ref.html
+fuzzy-if(geckoview,0-2,0-1382) == leftN-widthN-rightA.html leftN-widthN-rightA-ref.html
+fuzzy-if(geckoview,0-2,0-1382) == leftA-widthN-rightN.html leftA-widthN-rightN-ref.html
+fuzzy-if(geckoview,0-2,0-1382) == leftA-widthA-rightN.html leftA-widthA-rightN-ref.html
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightA.html toauto-leftN-widthA-rightA-ref.html
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightA-2.html toauto-leftN-widthA-rightA-2-ref.html
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightN.html toauto-leftN-widthA-rightN-ref.html
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthA-rightN-2.html toauto-leftN-widthA-rightN-2-ref.html
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftA-widthN-rightA.html toauto-leftA-widthN-rightA-ref.html
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftN-widthN-rightA.html toauto-leftN-widthN-rightA-ref.html
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftA-widthN-rightN.html toauto-leftA-widthN-rightN-ref.html
+fuzzy-if(geckoview,0-2,0-1382) == toauto-leftA-widthA-rightN.html toauto-leftA-widthA-rightN-ref.html
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightA.html leftN-widthA-rightA-ref.html
+random-if(cocoaWidget) fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightA-2.html leftN-widthA-rightA-2-ref.html # Bug 688545
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightN.html leftN-widthA-rightN-ref.html
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthA-rightN-2.html leftN-widthA-rightN-2-ref.html
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftA-widthN-rightA.html leftA-widthN-rightA-ref.html
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftN-widthN-rightA.html leftN-widthN-rightA-ref.html
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftA-widthN-rightN.html leftA-widthN-rightN-ref.html
+fuzzy-if(geckoview,0-2,0-1382) == fromauto-leftA-widthA-rightN.html leftA-widthA-rightN-ref.html
diff --git a/layout/reftests/position-dynamic-changes/horizontal/style.css b/layout/reftests/position-dynamic-changes/horizontal/style.css
new file mode 100644
index 0000000000..7486e56d4a
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/style.css
@@ -0,0 +1,20 @@
+#parent {
+ position: relative;
+ width: 400px;
+ height: 400px;
+ background: red;
+ border: 0 solid black;
+}
+#child {
+ position: absolute;
+ height: 100px;
+ top: 100px;
+ background: blue;
+ border: 0 solid black;
+}
+.floatLeft {
+ width: 50px;
+ height: 10px;
+ background: green;
+ float: left;
+}
diff --git a/layout/reftests/position-dynamic-changes/horizontal/toauto-leftA-widthA-rightN-ref.html b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftA-widthA-rightN-ref.html
new file mode 100644
index 0000000000..0cedbea5dc
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftA-widthA-rightN-ref.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/toauto-leftA-widthA-rightN.html b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftA-widthA-rightN.html
new file mode 100644
index 0000000000..d8b4de0f17
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftA-widthA-rightN.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="animate.js" type="text/javascript"></script>
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="right: 100px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ <script>
+ toAuto("right");
+ </script>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/toauto-leftA-widthN-rightA-ref.html b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftA-widthN-rightA-ref.html
new file mode 100644
index 0000000000..0cedbea5dc
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftA-widthN-rightA-ref.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/toauto-leftA-widthN-rightA.html b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftA-widthN-rightA.html
new file mode 100644
index 0000000000..f4e181b26a
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftA-widthN-rightA.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="animate.js" type="text/javascript"></script>
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="width: 100px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ <script>
+ toAuto("width");
+ </script>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/toauto-leftA-widthN-rightN-ref.html b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftA-widthN-rightN-ref.html
new file mode 100644
index 0000000000..92c8e40615
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftA-widthN-rightN-ref.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="width: 100px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/toauto-leftA-widthN-rightN.html b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftA-widthN-rightN.html
new file mode 100644
index 0000000000..dd5f32224d
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftA-widthN-rightN.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="animate.js" type="text/javascript"></script>
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="width: 100px; right: 100px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ <script>
+ toAuto("right");
+ </script>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightA-2-ref.html b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightA-2-ref.html
new file mode 100644
index 0000000000..0cedbea5dc
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightA-2-ref.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightA-2.html b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightA-2.html
new file mode 100644
index 0000000000..b1d36043f6
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightA-2.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="animate.js" type="text/javascript"></script>
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="left: 200px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ <script>
+ toAuto("left");
+ </script>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightA-ref.html b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightA-ref.html
new file mode 100644
index 0000000000..0cedbea5dc
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightA-ref.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightA.html b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightA.html
new file mode 100644
index 0000000000..d31aac067e
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightA.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="animate.js" type="text/javascript"></script>
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="left: 100px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ <script>
+ toAuto("left");
+ </script>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightN-2-ref.html b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightN-2-ref.html
new file mode 100644
index 0000000000..e8e205719d
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightN-2-ref.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="right: 20px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightN-2.html b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightN-2.html
new file mode 100644
index 0000000000..7aeb23f6a1
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightN-2.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="animate.js" type="text/javascript"></script>
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="left: 100px; right: 20px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ <script>
+ toAuto("left");
+ </script>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightN-ref.html b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightN-ref.html
new file mode 100644
index 0000000000..e8e205719d
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightN-ref.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="right: 20px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightN.html b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightN.html
new file mode 100644
index 0000000000..7aeb23f6a1
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthA-rightN.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="animate.js" type="text/javascript"></script>
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="left: 100px; right: 20px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ <script>
+ toAuto("left");
+ </script>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthN-rightA-ref.html b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthN-rightA-ref.html
new file mode 100644
index 0000000000..92c8e40615
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthN-rightA-ref.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="width: 100px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ </body>
+</html>
diff --git a/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthN-rightA.html b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthN-rightA.html
new file mode 100644
index 0000000000..30403a07b1
--- /dev/null
+++ b/layout/reftests/position-dynamic-changes/horizontal/toauto-leftN-widthN-rightA.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+ <head>
+ <link rel="stylesheet" type="text/css" href="style.css">
+ <script src="animate.js" type="text/javascript"></script>
+ <script src="../handleprop.js" type="text/javascript"></script>
+ </head>
+ <body>
+ <div id="parent">
+ <div id="child" style="width: 100px; left: 100px;">
+ <div class="floatLeft"></div>
+ <div class="floatLeft"></div>
+ </div>
+ </div>
+ <script>
+ toAuto("left");
+ </script>
+ </body>
+</html>