9 files changed, 128 insertions, 0 deletions
diff --git a/layout/reftests/frameset/frameset-add-col-ref.html b/layout/reftests/frameset/frameset-add-col-ref.html
new file mode 100644
index 0000000000..6cd1b4bf9e
--- /dev/null
+++ b/layout/reftests/frameset/frameset-add-col-ref.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset=utf-8>
+  </head>
+  <frameset id="frameset" cols="*,*">
+    <frame />
+    <frame />
+  </frameset>
+</html>
diff --git a/layout/reftests/frameset/frameset-add-col.html b/layout/reftests/frameset/frameset-add-col.html
new file mode 100644
index 0000000000..8fe32e1de7
--- /dev/null
+++ b/layout/reftests/frameset/frameset-add-col.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+  <head>
+    <meta charset=utf-8>
+    <script type="text/javascript">
+      window.addEventListener("MozReftestInvalidate", () => {
+        let frameset = document.getElementById("frameset");
+        let newFrame = document.createElement("frame");
+        frameset.appendChild(newFrame);
+        frameset.cols = "*";
+
+        newFrame = document.createElement("frame");
+        frameset.appendChild(newFrame);
+        frameset.cols = frameset.cols + ",*";
+
+        document.documentElement.removeAttribute("class");
+      });
+    </script>
+  </head>
+  <frameset id="frameset" cols="">
+  </frameset>
+</html>
diff --git a/layout/reftests/frameset/frameset-add-row-ref.html b/layout/reftests/frameset/frameset-add-row-ref.html
new file mode 100644
index 0000000000..4da1204655
--- /dev/null
+++ b/layout/reftests/frameset/frameset-add-row-ref.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset=utf-8>
+  </head>
+  <frameset id="frameset" rows="*,*">
+    <frame />
+    <frame />
+  </frameset>
+</html>
diff --git a/layout/reftests/frameset/frameset-add-row.html b/layout/reftests/frameset/frameset-add-row.html
new file mode 100644
index 0000000000..31fbfeed55
--- /dev/null
+++ b/layout/reftests/frameset/frameset-add-row.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+  <head>
+    <meta charset=utf-8>
+    <script type="text/javascript">
+      window.addEventListener("MozReftestInvalidate", () => {
+        let frameset = document.getElementById("frameset");
+        let newFrame = document.createElement("frame");
+        frameset.appendChild(newFrame);
+        frameset.rows = "*";
+
+        newFrame = document.createElement("frame");
+        frameset.appendChild(newFrame);
+        frameset.rows = frameset.rows + ",*";
+
+        document.documentElement.removeAttribute("class");
+      });
+    </script>
+  </head>
+  <frameset id="frameset" rows="">
+  </frameset>
+</html>
diff --git a/layout/reftests/frameset/frameset-remove-col-ref.html b/layout/reftests/frameset/frameset-remove-col-ref.html
new file mode 100644
index 0000000000..6cd1b4bf9e
--- /dev/null
+++ b/layout/reftests/frameset/frameset-remove-col-ref.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset=utf-8>
+  </head>
+  <frameset id="frameset" cols="*,*">
+    <frame />
+    <frame />
+  </frameset>
+</html>
diff --git a/layout/reftests/frameset/frameset-remove-col.html b/layout/reftests/frameset/frameset-remove-col.html
new file mode 100644
index 0000000000..1e266d2915
--- /dev/null
+++ b/layout/reftests/frameset/frameset-remove-col.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+  <head>
+    <meta charset=utf-8>
+    <script type="text/javascript">
+      window.addEventListener("MozReftestInvalidate", () => {
+        let frameset = document.getElementById("frameset");
+        frameset.removeChild(frameset.lastChild);
+        frameset.cols = frameset.cols.replace(/,[^,]*$/, "");
+
+        document.documentElement.removeAttribute("class");
+      });
+    </script>
+  </head>
+  <frameset id="frameset" cols="*,*,*">
+    <frame />
+    <frame />
+    <frame />
+  </frameset>
+</html>
diff --git a/layout/reftests/frameset/frameset-remove-row-ref.html b/layout/reftests/frameset/frameset-remove-row-ref.html
new file mode 100644
index 0000000000..4da1204655
--- /dev/null
+++ b/layout/reftests/frameset/frameset-remove-row-ref.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset=utf-8>
+  </head>
+  <frameset id="frameset" rows="*,*">
+    <frame />
+    <frame />
+  </frameset>
+</html>
diff --git a/layout/reftests/frameset/frameset-remove-row.html b/layout/reftests/frameset/frameset-remove-row.html
new file mode 100644
index 0000000000..7f55ac9493
--- /dev/null
+++ b/layout/reftests/frameset/frameset-remove-row.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+  <head>
+    <meta charset=utf-8>
+    <script type="text/javascript">
+      window.addEventListener("MozReftestInvalidate", () => {
+        let frameset = document.getElementById("frameset");
+        frameset.removeChild(frameset.lastChild);
+        frameset.rows = frameset.rows.replace(/,[^,]*$/, "");
+
+        document.documentElement.removeAttribute("class");
+      });
+    </script>
+  </head>
+  <frameset id="frameset" rows="*,*,*">
+    <frame />
+    <frame />
+    <frame />
+  </frameset>
+</html>
diff --git a/layout/reftests/frameset/reftest.list b/layout/reftests/frameset/reftest.list
new file mode 100644
index 0000000000..0d5ff10b16
--- /dev/null
+++ b/layout/reftests/frameset/reftest.list
@@ -0,0 +1,4 @@
+skip-if(ThreadSanitizer) == frameset-add-row.html frameset-add-row-ref.html
+== frameset-remove-row.html frameset-remove-row-ref.html
+== frameset-add-col.html frameset-add-col-ref.html
+== frameset-remove-col.html frameset-remove-col-ref.html