layout/style/test/test_compute_data_with_start_struct.html@8bccb770b82d (annotated)
layout/style/test/test_compute_data_with_start_struct.html
Wed, 31 Dec 2014 13:27:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 13:27:57 +0100
- branch
- TOR_BUG_3246
- changeset 6
- 8bccb770b82d
- permissions
- -rw-r--r--
Ignore runtime configuration files generated during quality assurance.
| michael@0 | 1 | <!DOCTYPE HTML> |
| michael@0 | 2 | <html> |
| michael@0 | 3 | <head> |
| michael@0 | 4 | <title>Test for correct handling of aStartStruct parameter to nsRuleNode::Compute*Data</title> |
| michael@0 | 5 | <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> |
| michael@0 | 6 | <script type="text/javascript" src="property_database.js"></script> |
| michael@0 | 7 | <style type="text/css" id="stylesheet"></style> |
| michael@0 | 8 | <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" /> |
| michael@0 | 9 | </head> |
| michael@0 | 10 | <body> |
| michael@0 | 11 | <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=216456">Mozilla Bug 216456</a> |
| michael@0 | 12 | <p id="display"> |
| michael@0 | 13 | <span id="base"></span> |
| michael@0 | 14 | <span id="test"></span> |
| michael@0 | 15 | </p> |
| michael@0 | 16 | <div id="content" style="display: none"> |
| michael@0 | 17 | |
| michael@0 | 18 | </div> |
| michael@0 | 19 | <pre id="test"> |
| michael@0 | 20 | <script class="testbody" type="text/javascript"> |
| michael@0 | 21 | |
| michael@0 | 22 | /** |
| michael@0 | 23 | * The purpose of this test is to test that nsRuleNode::Compute*Data |
| michael@0 | 24 | * functions are written correctly. In particular, in these functions, |
| michael@0 | 25 | * when the specified value of a property has unit eCSSUnit_Null, |
| michael@0 | 26 | * touching the computed data is forbidden. This is because we |
| michael@0 | 27 | * sometimes stop walking up the rule tree when we find computed data |
| michael@0 | 28 | * for an initial subsequence of our rules (i.e., an ancestor rule node) |
| michael@0 | 29 | * that we can use as a starting point (aStartStruct) for the |
| michael@0 | 30 | * computation for the current rule node. |
| michael@0 | 31 | * |
| michael@0 | 32 | * If one of these tests fails, you should look for a case where the |
| michael@0 | 33 | * property's code in nsRuleNode::Compute*Data touches the computed |
| michael@0 | 34 | * value when the specified value has eCSSUnit_Null, and fix it. |
| michael@0 | 35 | * |
| michael@0 | 36 | * The test works by maintaining one style rule that has every CSS |
| michael@0 | 37 | * property specified, and a second style rule that has different values |
| michael@0 | 38 | * for every property, an element that matches only the first rule (so |
| michael@0 | 39 | * that we'll have a cached struct), and *later* an element that matches |
| michael@0 | 40 | * both rules (for whose computation we'll find the struct cached from |
| michael@0 | 41 | * the first element). (It does this twice, once with the overriding in |
| michael@0 | 42 | * each direction, because one of the cases might match the incorrect |
| michael@0 | 43 | * overwriting.) Then, in the second style rule, it unsets each |
| michael@0 | 44 | * property, one at a time, and checks that the computation works |
| michael@0 | 45 | * correctly. (The reason to want every property set is to hit a case |
| michael@0 | 46 | * where we can store the data in the rule tree... though this isn't |
| michael@0 | 47 | * guaranteed.) |
| michael@0 | 48 | */ |
| michael@0 | 49 | |
| michael@0 | 50 | function xfail_computecheck(prop, roundnum) { |
| michael@0 | 51 | return false; |
| michael@0 | 52 | } |
| michael@0 | 53 | |
| michael@0 | 54 | function xfail_test(prop, roundnum) { |
| michael@0 | 55 | return false; |
| michael@0 | 56 | } |
| michael@0 | 57 | |
| michael@0 | 58 | var gStyleSheet = document.getElementById("stylesheet").sheet; |
| michael@0 | 59 | var gRule1 = gStyleSheet.cssRules[gStyleSheet.insertRule("#base, #test {}", gStyleSheet.cssRules.length)]; |
| michael@0 | 60 | var gRule2 = gStyleSheet.cssRules[gStyleSheet.insertRule("#test {}", gStyleSheet.cssRules.length)]; |
| michael@0 | 61 | |
| michael@0 | 62 | var gBase = getComputedStyle(document.getElementById("base"), ""); |
| michael@0 | 63 | var gTest = getComputedStyle(document.getElementById("test"), ""); |
| michael@0 | 64 | |
| michael@0 | 65 | function round(lower_set, higher_set, roundnum) { |
| michael@0 | 66 | |
| michael@0 | 67 | for (var prop in gCSSProperties) { |
| michael@0 | 68 | var info = gCSSProperties[prop]; |
| michael@0 | 69 | if (info.backend_only || info.subproperties || info.get_computed) |
| michael@0 | 70 | continue; |
| michael@0 | 71 | gRule1.style.setProperty(prop, info[lower_set][0], ""); |
| michael@0 | 72 | gRule2.style.setProperty(prop, info[higher_set][0], ""); |
| michael@0 | 73 | } |
| michael@0 | 74 | |
| michael@0 | 75 | for (var prop in gCSSProperties) { |
| michael@0 | 76 | var info = gCSSProperties[prop]; |
| michael@0 | 77 | if (info.backend_only || info.subproperties || info.get_computed) |
| michael@0 | 78 | continue; |
| michael@0 | 79 | |
| michael@0 | 80 | if ("prerequisites" in info) { |
| michael@0 | 81 | for (var prereq in info.prerequisites) { |
| michael@0 | 82 | gRule2.style.setProperty(prereq, info.prerequisites[prereq], ""); |
| michael@0 | 83 | } |
| michael@0 | 84 | } |
| michael@0 | 85 | |
| michael@0 | 86 | gBase.getPropertyValue(prop); |
| michael@0 | 87 | var higher_set_val = gTest.getPropertyValue(prop); |
| michael@0 | 88 | gRule2.style.setProperty(prop, info[lower_set][0], ""); |
| michael@0 | 89 | var lower_set_val = gTest.getPropertyValue(prop); |
| michael@0 | 90 | (xfail_computecheck(prop, roundnum) ? todo_isnot : isnot)(higher_set_val, lower_set_val, "initial and other values of " + prop + " are different"); |
| michael@0 | 91 | gRule2.style.removeProperty(prop); |
| michael@0 | 92 | (xfail_test(prop, roundnum) ? todo_is : is)(gTest.getPropertyValue(prop), lower_set_val, prop + " is not touched when its value comes from aStartStruct"); |
| michael@0 | 93 | |
| michael@0 | 94 | gRule2.style.setProperty(prop, info[higher_set][0], ""); |
| michael@0 | 95 | if ("prerequisites" in info) { |
| michael@0 | 96 | for (var prereq in info.prerequisites) { |
| michael@0 | 97 | gRule2.style.setProperty(prereq, gCSSProperties[prereq][higher_set][0], ""); |
| michael@0 | 98 | } |
| michael@0 | 99 | } |
| michael@0 | 100 | } |
| michael@0 | 101 | } |
| michael@0 | 102 | |
| michael@0 | 103 | round("other_values", "initial_values", 1); |
| michael@0 | 104 | round("initial_values", "other_values", 2); |
| michael@0 | 105 | |
| michael@0 | 106 | </script> |
| michael@0 | 107 | </pre> |
| michael@0 | 108 | </body> |
| michael@0 | 109 | </html> |
