wpt/css/css-mixins/local-inherit-substitution.html at master · web-platform-tests/wpt · GitHub

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<!DOCTYPE html>
<title>Custom Functions: Local inherit() substitution</title>
<link rel="help" href="https://drafts.csswg.org/css-mixins-1/">
<link rel="help" href="https://drafts.csswg.org/css-values-5/#inherit-notation">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/utils.js"></script>

<div id=parent>
  <div id=target></div>
</div>
<div id=main></div>

<!-- To pass, a test must produce matching computed values for '--actual'
     and '--expected' on '#target'. -->

<template data-name="inherit() refers to parent stack frame (element)">
  <style>
    @function --f() {
      --x: FAIL2;
      result: inherit(--x);
    }
    #parent {
      --x: FAIL1;
    }
    #parent > #target {
      --x: PASS;
      --actual: --f();
      --expected: PASS;
    }
  </style>
</template>

<template data-name="inherit() refers to parent stack frame (other function call)">
  <style>
    @function --f() {
      --x: PASS;
      result: --g();
    }
    @function --g() {
      --x: FAIL3;
      result: inherit(--x);
    }
    #parent {
      --x: FAIL1;
    }
    #parent > #target {
      --x: FAIL2;
      --actual: --f();
      --expected: PASS;
    }
  </style>
</template>

<template data-name="inherit() referring to guaranteed-invalid in parent frame">
  <style>
    @function --f() {
      --x: var(--noexist);
      result: --g();
    }
    @function --g() {
      --x: FAIL3;
      result: inherit(--x, PASS);
    }
    #parent {
      --x: FAIL1;
    }
    #parent > #target {
      --x: FAIL2;
      --actual: --f();
      --expected: PASS;
    }
  </style>
</template>

<template data-name="inherit() referring to cycle in parent frame">
  <style>
    @function --f() {
      --x: var(--x);
      result: --g();
    }
    @function --g() {
      --x: FAIL3;
      result: inherit(--x, PASS);
    }
    #parent {
      --x: FAIL1;
    }
    #parent > #target {
      --x: FAIL2;
      --actual: --f();
      --expected: PASS;
    }
  </style>
</template>


<template data-name="inherit() referring to typed value in parent frame">
  <style>
    @function --f(--x <length>) {
      result: --g();
    }
    @function --g() {
      --x: 14px;
      result: inherit(--x);
    }
    #parent {
      --x: 12px;
    }
    #parent > #target {
      --x: 13px;
      --actual: --f(42.0px);
      --expected: 42px;
    }
  </style>
</template>

<script>
  test_all_templates();
</script>