1 files changed, 159 insertions, 0 deletions
diff --git a/layout/style/test/test_inherit_computation.html b/layout/style/test/test_inherit_computation.html
new file mode 100644
index 000000000..a4407418c
--- /dev/null
+++ b/layout/style/test/test_inherit_computation.html
@@ -0,0 +1,159 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+-->
+<head>
+  <title>Test for computation of CSS 'inherit' on all properties and 'unset' on inherited properties</title>
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript" src="property_database.js"></script>
+  <style type="text/css" id="stylesheet"></style>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<p id="display"><span id="fparent"><span id="fchild"></span></span></p>
+<div id="content" style="display: none">
+
+<div id="testnode"><span id="nparent"><span id="nchild"></span></span></div>
+  
+</div>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+
+/** Test for computation of CSS 'inherit' on all properties and 'unset' on
+    inherited properties **/
+
+// elements without a frame
+var gNParent = document.getElementById("nparent");
+var gNChild = document.getElementById("nchild");
+// elements with a frame
+var gFParent = document.getElementById("fparent");
+var gFChild = document.getElementById("fchild");
+
+var gStyleSheet = document.getElementById("stylesheet").sheet;
+var gChildRule1 = gStyleSheet.cssRules[gStyleSheet.insertRule("#nchild, #fchild {}", gStyleSheet.cssRules.length)];
+var gChildRule2 = gStyleSheet.cssRules[gStyleSheet.insertRule("#nchild, #fchild {}", gStyleSheet.cssRules.length)];
+var gChildRule3 = gStyleSheet.cssRules[gStyleSheet.insertRule("#nchild.allother, #fchild.allother {}", gStyleSheet.cssRules.length)];
+var gChildRuleTop = gStyleSheet.cssRules[gStyleSheet.insertRule("#nchild, #nchild.allother, #fchild, #fchild.allother {}", gStyleSheet.cssRules.length)];
+var gParentRuleTop = gStyleSheet.cssRules[gStyleSheet.insertRule("#nparent, #fparent {}", gStyleSheet.cssRules.length)];
+
+var gTestUnset = SpecialPowers.getBoolPref("layout.css.unset-value.enabled");
+
+function get_computed_value_node(node, property)
+{
+  var cs = getComputedStyle(node, "");
+  return get_computed_value(cs, property);
+}
+
+function test_property(property)
+{
+  var info = gCSSProperties[property];
+
+  var keywords = ["inherit"];
+  if (info.inherited && gTestUnset)
+    keywords.push("unset");
+
+  keywords.forEach(function(keyword) {
+    if ("prerequisites" in info) {
+      var prereqs = info.prerequisites;
+      for (var prereq in prereqs) {
+        gParentRuleTop.style.setProperty(prereq, prereqs[prereq], "");
+        gChildRuleTop.style.setProperty(prereq, prereqs[prereq], "");
+      }
+    }
+
+    if (info.inherited) {
+      gParentRuleTop.style.setProperty(property, info.initial_values[0], "");
+      var initial_computed_n = get_computed_value_node(gNChild, property);
+      var initial_computed_f = get_computed_value_node(gFChild, property);
+      gChildRule1.style.setProperty(property, info.other_values[0], "");
+      var other_computed_n = get_computed_value_node(gNChild, property);
+      var other_computed_f = get_computed_value_node(gFChild, property);
+      isnot(other_computed_n, initial_computed_n,
+            "should be testing with values that compute to different things " +
+            "for '" + property + "'");
+      isnot(other_computed_f, initial_computed_f,
+            "should be testing with values that compute to different things " +
+            "for '" + property + "'");
+      gChildRule3.style.setProperty(property, keyword, "");
+      gFChild.className="allother";
+      gNChild.className="allother";
+      var inherit_initial_computed_n = get_computed_value_node(gNChild, property);
+      var inherit_initial_computed_f = get_computed_value_node(gFChild, property);
+      is(inherit_initial_computed_n, initial_computed_n,
+         keyword + " should cause inheritance of initial value for '" +
+         property + "'");
+      is(inherit_initial_computed_f, initial_computed_f,
+         keyword + " should cause inheritance of initial value for '" +
+         property + "'");
+      gParentRuleTop.style.setProperty(property, info.other_values[0], "");
+      var inherit_other_computed_n = get_computed_value_node(gNChild, property);
+      var inherit_other_computed_f = get_computed_value_node(gFChild, property);
+      is(inherit_other_computed_n, other_computed_n,
+         keyword + " should cause inheritance of other value for '" +
+         property + "'");
+      is(inherit_other_computed_f, other_computed_f,
+         keyword + " should cause inheritance of other value for '" +
+         property + "'");
+      gParentRuleTop.style.removeProperty(property);
+      gChildRule1.style.removeProperty(property);
+      gChildRule3.style.setProperty(property, info.other_values[0], "");
+      gFChild.className="";
+      gNChild.className="";
+    } else {
+      gParentRuleTop.style.setProperty(property, info.other_values[0], "");
+      var initial_computed_n = get_computed_value_node(gNChild, property);
+      var initial_computed_f = get_computed_value_node(gFChild, property);
+      var other_computed_n = get_computed_value_node(gNParent, property);
+      var other_computed_f = get_computed_value_node(gFParent, property);
+      isnot(other_computed_n, initial_computed_n,
+            "should be testing with values that compute to different things " +
+            "for '" + property + "'");
+      isnot(other_computed_f, initial_computed_f,
+            "should be testing with values that compute to different things " +
+            "for '" + property + "'");
+      gChildRule2.style.setProperty(property, keyword, "");
+      var inherit_other_computed_n = get_computed_value_node(gNChild, property);
+      var inherit_other_computed_f = get_computed_value_node(gFChild, property);
+      is(inherit_other_computed_n, other_computed_n,
+         keyword + " should cause inheritance of other value for '" +
+         property + "'");
+      is(inherit_other_computed_f, other_computed_f,
+         keyword + " should cause inheritance of other value for '" +
+         property + "'");
+      gParentRuleTop.style.removeProperty(property);
+      gChildRule1.style.setProperty(property, info.other_values[0], "");
+      var inherit_initial_computed_n = get_computed_value_node(gNChild, property);
+      var inherit_initial_computed_f = get_computed_value_node(gFChild, property);
+      is(inherit_initial_computed_n, initial_computed_n,
+         keyword + " should cause inheritance of initial value for '" +
+         property + "'");
+      is(inherit_initial_computed_f, initial_computed_f,
+         keyword + " should cause inheritance of initial value for '" +
+         property + "'");
+      gParentRuleTop.style.removeProperty(property);
+      gChildRule1.style.removeProperty(property);
+      gChildRule2.style.removeProperty(property);
+    }
+
+    if ("prerequisites" in info) {
+      var prereqs = info.prerequisites;
+      for (var prereq in prereqs) {
+        gParentRuleTop.style.removeProperty(prereq);
+        gChildRuleTop.style.removeProperty(prereq);
+      }
+    }
+  });
+}
+
+for (var prop in gCSSProperties) {
+  var info = gCSSProperties[prop];
+  gChildRule3.style.setProperty(prop, info.other_values[0], "");
+}
+
+for (var prop in gCSSProperties)
+  test_property(prop);
+
+</script>
+</pre>
+</body>
+</html>