<!doctype html>
<meta charset="utf-8">
<title>CSSPerspective tests</title>
<link rel="help" href="https://drafts.css-houdini.org/css-typed-om-1/#cssperspective">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../resources/testhelper.js"></script>
<script>
'use strict';

const gInvalidTestCases = [
  { length: 'auto', desc: 'a keyword other than none (string)'},
  { length: new CSSKeywordValue('auto'), desc: 'a keyword other than none (CSSKeywordValue)'},
  { length: 3.14, desc: 'a double'},
  { length: 0, desc: 'a unitless zero'},
  { length: '10px', desc: 'a string length'},
  { length: CSS.number(10), desc: 'a number CSSUnitValue'},
  { length: CSS.s(10), desc: 'a time dimension CSSUnitValue'},
  { length: new CSSMathSum(CSS.deg(1)), desc: 'a CSSMathValue of angle type' },
];

for (const {length, desc} of gInvalidTestCases) {
  test(() => {
    assert_throws_js(TypeError, () => new CSSPerspective(length));
  }, 'Constructing a CSSPerspective with ' + desc + ' throws a TypeError');
}

for (const {length, desc} of gInvalidTestCases) {
  test(() => {
    let perspective = new CSSPerspective(CSS.px(0));
    assert_throws_js(TypeError, () => perspective.length = length);
    assert_style_value_equals(perspective.length, CSS.px(0));
  }, 'Updating CSSPerspective.length with ' + desc + ' throws a TypeError');
}

const gValidTestCases = [
  { length: CSS.px(-3.14), desc: 'a length CSSUnitValue' },
  { length: new CSSMathSum(CSS.px(1)), desc: 'a CSSMathValue of length type' },
  { length: new CSSKeywordValue('none'), desc: 'none (CSSKeywordValue)' },
];

for (const {length, desc} of gValidTestCases) {
  test(() => {
    const perspective = new CSSPerspective(length);
    assert_equals(perspective.length, length);
    assert_false(perspective.is2D);
  }, 'CSSPerspective can be constructed from ' + desc);

  test(() => {
    let perspective = new CSSPerspective(CSS.px(0), CSS.px(0));
    perspective.length = length;
    assert_style_value_equals(perspective.length, length);
  }, 'CSSPerspective.length can be updated to ' + desc);
}

const gConvertingValidTestCases = [
  { length: "none", expected: new CSSKeywordValue('none'), desc: 'none (string)' },
];

for (const {length, expected, desc} of gConvertingValidTestCases) {
  test(() => {
    const perspective = new CSSPerspective(length);
    assert_style_value_equals(perspective.length, expected);
    assert_false(perspective.is2D);
  }, 'CSSPerspective can be constructed from ' + desc);

  test(() => {
    let perspective = new CSSPerspective(CSS.px(0), CSS.px(0));
    perspective.length = length;
    assert_style_value_equals(perspective.length, expected);
  }, 'CSSPerspective.length can be updated to ' + desc);
}

test(() => {
  let perspective = new CSSPerspective(CSS.px(0), CSS.px(0));
  perspective.is2D = true;
  assert_false(perspective.is2D);
}, 'Modifying CSSPerspective.is2D is a no-op');

</script>
