| <!DOCTYPE html> | |
| <meta charset="UTF-8"> | |
| <title>CSS Values and Units Test: computed value of 'z-index' when specified with calc() function and fractional values</title> | |
| <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/"> | |
| <link rel="help" href="https://www.w3.org/TR/css-values-4/#calc-range"> | |
| <meta name="flags" content=""> | |
| <meta content="This test verifies how 2 calc() functions are computed for 'z-index' when involved expressions end up being numbers halfway between adjacent integers." name="assert"> | |
| <script src="/resources/testharness.js"></script> | |
| <script src="/resources/testharnessreport.js"></script> | |
| <div id="target"></div> | |
| <script> | |
| function startTesting() | |
| { | |
| var targetElement = document.getElementById("target"); | |
| function verifyComputedStyle(property_name, initial_value, specified_value, expected_value, description) | |
| { | |
| test(function() | |
| { | |
| targetElement.style.setProperty(property_name, initial_value); | |
| /* | |
| The purpose of the initial_value is to act as a fallback | |
| value in case the calc() function in the specified value | |
| fails or in case it generates an invalid value. Since we | |
| are running 2 consecutive tests on the same element, | |
| then it is necessary to reset its property to an initial | |
| value. | |
| */ | |
| targetElement.style.setProperty(property_name, specified_value); | |
| assert_equals(getComputedStyle(targetElement)[property_name], expected_value); | |
| }, description); | |
| } | |
| /* verifyComputedStyle(property_name, initial_value, specified_value, expected_value, description) */ | |
| verifyComputedStyle("z-index", "auto", "calc(3 / 2)", "2", "testing z-index: calc(3 / 2)"); | |
| verifyComputedStyle("z-index", "auto", "calc(-3 / 2)", "-1", "testing z-index: calc(-3 / 2)"); | |
| } | |
| startTesting(); | |
| </script> |