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+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=345624
+-->
+<head>
+  <title>Test for Bug 345624</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="/tests/SimpleTest/EventUtils.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+  <style>
+    input, textarea { background-color: rgb(0,0,0) !important; }
+    :-moz-any(input,textarea):valid   { background-color: rgb(0,255,0) !important; }
+    :-moz-any(input,textarea):invalid { background-color: rgb(255,0,0) !important; }
+  </style>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=345624">Mozilla Bug 345624</a>
+<p id="display"></p>
+<div id="content">
+  <input id='i'>
+  <textarea id='t'></textarea>
+</div>
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for Bug 345624 **/
+
+/**
+ * This test is checking only tooLong related features
+ * related to constraint validation.
+ */
+
+function checkTooLongValidity(element)
+{
+  element.value = "foo";
+  ok(!element.validity.tooLong,
+    "Element should not be too long when maxlength is not set");
+  is(window.getComputedStyle(element).getPropertyValue('background-color'),
+     "rgb(0, 255, 0)", ":valid pseudo-class should apply");
+  ok(element.validity.valid, "Element should be valid");
+  ok(element.checkValidity(), "The element should be valid");
+
+  element.maxLength = 1;
+  ok(!element.validity.tooLong,
+    "Element should not be too long unless the user edits it");
+  is(window.getComputedStyle(element).getPropertyValue('background-color'),
+     "rgb(0, 255, 0)", ":valid pseudo-class should apply");
+  ok(element.validity.valid, "Element should be valid");
+  ok(element.checkValidity(), "The element should be valid");
+
+  element.focus();
+
+  synthesizeKey("KEY_Backspace");
+  is(element.value, "fo", "value should have changed");
+  ok(element.validity.tooLong,
+    "Element should be too long after a user edit that does not make it short enough");
+  is(window.getComputedStyle(element).getPropertyValue('background-color'),
+     "rgb(255, 0, 0)", ":invalid pseudo-class should apply");
+  ok(!element.validity.valid, "Element should be invalid");
+  ok(!element.checkValidity(), "The element should not be valid");
+  is(element.validationMessage,
+          "Please shorten this text to 1 characters or less (you are currently using 2 characters).",
+          "The validation message text is not correct");
+
+  synthesizeKey("KEY_Backspace");
+  is(element.value, "f", "value should have changed");
+  ok(!element.validity.tooLong,
+    "Element should not be too long after a user edit makes it short enough");
+  is(window.getComputedStyle(element).getPropertyValue('background-color'),
+     "rgb(0, 255, 0)", ":valid pseudo-class should apply");
+  ok(element.validity.valid, "Element should be valid");
+
+  element.maxLength = 2;
+  ok(!element.validity.tooLong,
+    "Element should remain valid if maxlength changes but maxlength > length");
+  is(window.getComputedStyle(element).getPropertyValue('background-color'),
+     "rgb(0, 255, 0)", ":valid pseudo-class should apply");
+  ok(element.validity.valid, "Element should be valid");
+
+  element.maxLength = 1;
+  ok(!element.validity.tooLong,
+    "Element should remain valid if maxlength changes but maxlength = length");
+  is(window.getComputedStyle(element).getPropertyValue('background-color'),
+     "rgb(0, 255, 0)", ":valid pseudo-class should apply");
+  ok(element.validity.valid, "Element should be valid");
+  ok(element.checkValidity(), "The element should be valid");
+
+  element.maxLength = 0;
+  ok(element.validity.tooLong,
+    "Element should become invalid if maxlength changes and maxlength < length");
+  is(window.getComputedStyle(element).getPropertyValue('background-color'),
+     "rgb(255, 0, 0)", ":invalid pseudo-class should apply");
+  ok(!element.validity.valid, "Element should be invalid");
+  ok(!element.checkValidity(), "The element should not be valid");
+  is(element.validationMessage,
+          "Please shorten this text to 0 characters or less (you are currently using 1 characters).",
+          "The validation message text is not correct");
+
+  element.maxLength = 1;
+  ok(!element.validity.tooLong,
+    "Element should become valid if maxlength changes and maxlength = length");
+  is(window.getComputedStyle(element).getPropertyValue('background-color'),
+     "rgb(0, 255, 0)", ":valid pseudo-class should apply");
+  ok(element.validity.valid, "Element should be valid");
+  ok(element.checkValidity(), "The element should be valid");
+
+  element.value = "test";
+  ok(!element.validity.tooLong,
+    "Element should stay valid after programmatic edit (even if value is too long)");
+  is(window.getComputedStyle(element).getPropertyValue('background-color'),
+     "rgb(0, 255, 0)", ":valid pseudo-class should apply");
+  ok(element.validity.valid, "Element should be valid");
+  ok(element.checkValidity(), "The element should be valid");
+
+  element.setCustomValidity("custom message");
+  is(window.getComputedStyle(element).getPropertyValue('background-color'),
+     "rgb(255, 0, 0)", ":invalid pseudo-class should apply");
+  is(element.validationMessage, "custom message",
+    "Custom message should be shown instead of too long one");
+}
+
+checkTooLongValidity(document.getElementById('i'));
+checkTooLongValidity(document.getElementById('t'));
+
+</script>
+</pre>
+</body>
+</html>