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author | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
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committer | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
commit | 5f8de423f190bbb79a62f804151bc24824fa32d8 (patch) | |
tree | 10027f336435511475e392454359edea8e25895d /layout/style/test/test_compute_data_with_start_struct.html | |
parent | 49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff) | |
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Add m-esr52 at 52.6.0
Diffstat (limited to 'layout/style/test/test_compute_data_with_start_struct.html')
-rw-r--r-- | layout/style/test/test_compute_data_with_start_struct.html | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/layout/style/test/test_compute_data_with_start_struct.html b/layout/style/test/test_compute_data_with_start_struct.html new file mode 100644 index 000000000..fab111e34 --- /dev/null +++ b/layout/style/test/test_compute_data_with_start_struct.html @@ -0,0 +1,109 @@ +<!DOCTYPE HTML> +<html> +<head> + <title>Test for correct handling of aStartStruct parameter to nsRuleNode::Compute*Data</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> +<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=216456">Mozilla Bug 216456</a> +<p id="display"> + <span id="base"></span> + <span id="test"></span> +</p> +<div id="content" style="display: none"> + +</div> +<pre id="test"> +<script class="testbody" type="text/javascript"> + +/** + * The purpose of this test is to test that nsRuleNode::Compute*Data + * functions are written correctly. In particular, in these functions, + * when the specified value of a property has unit eCSSUnit_Null, + * touching the computed data is forbidden. This is because we + * sometimes stop walking up the rule tree when we find computed data + * for an initial subsequence of our rules (i.e., an ancestor rule node) + * that we can use as a starting point (aStartStruct) for the + * computation for the current rule node. + * + * If one of these tests fails, you should look for a case where the + * property's code in nsRuleNode::Compute*Data touches the computed + * value when the specified value has eCSSUnit_Null, and fix it. + * + * The test works by maintaining one style rule that has every CSS + * property specified, and a second style rule that has different values + * for every property, an element that matches only the first rule (so + * that we'll have a cached struct), and *later* an element that matches + * both rules (for whose computation we'll find the struct cached from + * the first element). (It does this twice, once with the overriding in + * each direction, because one of the cases might match the incorrect + * overwriting.) Then, in the second style rule, it unsets each + * property, one at a time, and checks that the computation works + * correctly. (The reason to want every property set is to hit a case + * where we can store the data in the rule tree... though this isn't + * guaranteed.) + */ + +function xfail_computecheck(prop, roundnum) { + return false; +} + +function xfail_test(prop, roundnum) { + return false; +} + +var gStyleSheet = document.getElementById("stylesheet").sheet; +var gRule1 = gStyleSheet.cssRules[gStyleSheet.insertRule("#base, #test {}", gStyleSheet.cssRules.length)]; +var gRule2 = gStyleSheet.cssRules[gStyleSheet.insertRule("#test {}", gStyleSheet.cssRules.length)]; + +var gBase = getComputedStyle(document.getElementById("base"), ""); +var gTest = getComputedStyle(document.getElementById("test"), ""); + +function round(lower_set, higher_set, roundnum) { + + for (var prop in gCSSProperties) { + var info = gCSSProperties[prop]; + if (info.subproperties || info.get_computed) + continue; + gRule1.style.setProperty(prop, info[lower_set][0], ""); + gRule2.style.setProperty(prop, info[higher_set][0], ""); + } + + for (var prop in gCSSProperties) { + var info = gCSSProperties[prop]; + if (info.subproperties || info.get_computed) + continue; + + if ("prerequisites" in info) { + for (var prereq in info.prerequisites) { + gRule2.style.setProperty(prereq, info.prerequisites[prereq], ""); + } + } + + gBase.getPropertyValue(prop); + var higher_set_val = gTest.getPropertyValue(prop); + gRule2.style.setProperty(prop, info[lower_set][0], ""); + var lower_set_val = gTest.getPropertyValue(prop); + (xfail_computecheck(prop, roundnum) ? todo_isnot : isnot)(higher_set_val, lower_set_val, "initial and other values of " + prop + " are different"); + gRule2.style.removeProperty(prop); + (xfail_test(prop, roundnum) ? todo_is : is)(gTest.getPropertyValue(prop), lower_set_val, prop + " is not touched when its value comes from aStartStruct"); + + gRule2.style.setProperty(prop, info[higher_set][0], ""); + if ("prerequisites" in info) { + for (var prereq in info.prerequisites) { + gRule2.style.setProperty(prereq, gCSSProperties[prereq][higher_set][0], ""); + } + } + } +} + +round("other_values", "initial_values", 1); +round("initial_values", "other_values", 2); + +</script> +</pre> +</body> +</html> |