<!DOCTYPE html>
<title>CSSStyleSheet constructor and adoptedStyleSheets</title>
<link rel="author" title="Rakina Zata Amni" href="mailto:rakina@chromium.org">
<link rel="help" href="https://wicg.github.io/construct-stylesheets/">
<script src = '/resources/testharness.js'></script>
<script src = '/resources/testharnessreport.js'></script>

<section id="firstSection">
  <div>
    <span class="green"></span>
    <span class="red"></span>
    <span class="blue"></span>
    <span class="white"></span>
    <span class="yellow"></span>
  </div>
</section>
<section id="shadowHost"></section>
<section id="thirdSection"></section>

<script>
'use strict';
const greenStyleText = ".green { color: green; }";
const redStyleTexts = [".red { color: red; }", ".red + span + span { color: red; }"];
const blueStyleTexts = [".blue { color: blue; }", ".blue + span + span { color: blue; }"];
const whiteStyleText = "* { color: white; }";
const yellowStyleText = ".yellow { color: yellow; }";

const firstDiv = document.querySelector('#firstSection > div');
const secondDiv = firstDiv.cloneNode(true);
const shadowHost = document.querySelector('#shadowHost');
const shadowRoot = shadowHost.attachShadow({mode: 'open'});
shadowRoot.appendChild(secondDiv);

const greenSpan = firstDiv.children[0];
const redSpan = firstDiv.children[1];
const blueSpan = firstDiv.children[2];
const whiteSpan = firstDiv.children[3];
const yellowSpan = firstDiv.children[4];
const greenShadowSpan = secondDiv.children[0];
const redShadowSpan = secondDiv.children[1];
const blueShadowSpan = secondDiv.children[2];
const whiteShadowSpan = secondDiv.children[3];
const yellowShadowSpan = secondDiv.children[4];

test(() => {
  assert_equals(document.adoptedStyleSheets.length, 0);
}, "document.adoptedStyleSheets should initially have length 0.");

test(() => {
  const sheet = new CSSStyleSheet({disabled: true, media: "screen, print"});
  assert_equals(sheet.title, null, "The title attribute must return the title or null if title is the empty string");
  assert_equals(sheet.ownerNode, null);
  assert_equals(sheet.ownerRule, null);
  assert_equals(sheet.media.length, 2);
  assert_equals(sheet.media.item(0), "screen");
  assert_equals(sheet.media.item(1), "print");
  assert_true(sheet.disabled);
  assert_equals(sheet.cssRules.length, 0);

  sheet.insertRule(redStyleTexts[0]);
  assert_equals(sheet.cssRules.length, 1);
  assert_equals(sheet.cssRules[0].cssText, redStyleTexts[0]);

  sheet.insertRule(redStyleTexts[1]);
  assert_equals(sheet.cssRules.length, 2);
  assert_equals(sheet.cssRules[0].cssText, redStyleTexts[1]);

  const sheet2 = new CSSStyleSheet({});
  assert_equals(sheet2.title, null, "The title attribute must return the title or null if title is the empty string");
  assert_equals(sheet2.ownerNode, null);
  assert_equals(sheet2.ownerRule, null);
  assert_equals(sheet2.media.length, 0);
  assert_false(sheet2.disabled);
  assert_equals(sheet2.cssRules.length, 0);

  sheet2.insertRule(redStyleTexts[1]);
  assert_equals(sheet2.cssRules.length, 1);
  assert_equals(sheet2.cssRules[0].cssText, redStyleTexts[1]);

  sheet2.deleteRule(0);
  assert_equals(sheet2.cssRules.length, 0);

  const sheet3 = new CSSStyleSheet();
  assert_equals(sheet3.title, null, "The title attribute must return the title or null if title is the empty string");
  assert_equals(sheet3.ownerNode, null);
  assert_equals(sheet3.ownerRule, null);
  assert_equals(sheet3.media.length, 0);
  assert_false(sheet3.disabled);
  assert_equals(sheet3.cssRules.length, 0);

  sheet3.insertRule(redStyleTexts[1]);
  assert_equals(sheet3.cssRules.length, 1);
  assert_equals(sheet3.cssRules[0].cssText, redStyleTexts[1]);

  sheet3.deleteRule(0);
  assert_equals(sheet3.cssRules.length, 0);
}, 'new CSSStyleSheet produces empty CSSStyleSheet');

test(() => {
  const sheet = new CSSStyleSheet({title: "something"});
  assert_equals(sheet.title, null, "title and alternate are not supported by the constructor. https://github.com/WICG/construct-stylesheets/issues/105");
}, "title can be set in the CSSStyleSheet constructor");

promise_test(() => {
  const sheet = new CSSStyleSheet({disabled: true, media: "screen, print"});
  const promise_sheet = sheet.replace(redStyleTexts[0]);
  return promise_sheet.then(function(sheet) {
    assert_equals(sheet.title, null, "The title attribute must return the title or null if title is the empty string");
    assert_equals(sheet.ownerNode, null);
    assert_equals(sheet.ownerRule, null);
    assert_equals(sheet.media.length, 2);
    assert_equals(sheet.media.item(0), "screen");
    assert_equals(sheet.media.item(1), "print");
    assert_true(sheet.disabled);
    assert_equals(sheet.cssRules.length, 1);
    assert_equals(sheet.cssRules[0].cssText, redStyleTexts[0]);

    sheet.insertRule(redStyleTexts[1]);
    assert_equals(sheet.cssRules.length, 2);
    assert_equals(sheet.cssRules[0].cssText, redStyleTexts[1]);
  });
}, 'CSSStyleSheet.replace produces Promise<CSSStyleSheet>');

function createAllSheetsPromise() {
  const greenSheet = new CSSStyleSheet();
  const redSheet = new CSSStyleSheet({media: "screen, print"});
  const blueSheet = new CSSStyleSheet({disabled: true});
  const whiteSheet = new CSSStyleSheet({disabled: true});
  const yellowSheet = new CSSStyleSheet({disabled: false});

  const greenPromise = greenSheet.replace(greenStyleText);
  const redPromise = redSheet.replace(redStyleTexts[0] + redStyleTexts[1]);
  const bluePromise = blueSheet.replace(blueStyleTexts[0] + blueStyleTexts[1]);
  const whitePromise = whiteSheet.replace(whiteStyleText);
  const yellowPromise = yellowSheet.replace(yellowStyleText);
  return [greenPromise, redPromise, bluePromise, whitePromise, yellowPromise];
}

promise_test(() => {
  return Promise.all(createAllSheetsPromise()).then(values => {
    const greenStyleSheet = values[0];
    const redStyleSheet = values[1];
    const blueStyleSheet = values[2];
    const whiteStyleSheet = values[3];
    const yellowStyleSheet = values[4];

    // Lists of style sheets can be created, assigned and read.

    // disabled stylesheets aren't applied
    document.adoptedStyleSheets = [whiteStyleSheet];
    assert_equals(getComputedStyle(greenSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(redSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(blueSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(whiteSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(yellowSpan).color, "rgb(0, 0, 0)");

    // disable dsheets don't block other styles from applying
    document.adoptedStyleSheets = [greenStyleSheet, blueStyleSheet];
    assert_equals(getComputedStyle(greenSpan).color, "rgb(0, 128, 0)");
    assert_equals(getComputedStyle(redSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(blueSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(whiteSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(yellowSpan).color, "rgb(0, 0, 0)");

    document.adoptedStyleSheets = [redStyleSheet, yellowStyleSheet];

    assert_equals(getComputedStyle(greenSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(redSpan).color, "rgb(255, 0, 0)");
    assert_equals(getComputedStyle(blueSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(whiteSpan).color, "rgb(255, 0, 0)");
    assert_equals(getComputedStyle(yellowSpan).color, "rgb(255, 255, 0)");

    document.adoptedStyleSheets = [redStyleSheet, yellowStyleSheet, greenStyleSheet, blueStyleSheet];
    assert_equals(getComputedStyle(greenSpan).color, "rgb(0, 128, 0)");
    assert_equals(getComputedStyle(redSpan).color, "rgb(255, 0, 0)");
    assert_equals(getComputedStyle(blueSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(whiteSpan).color, "rgb(255, 0, 0)");
    assert_equals(getComputedStyle(yellowSpan).color, "rgb(255, 255, 0)");
    document.adoptedStyleSheets = [];
  });
}, 'Constructed style sheets can be applied on document');

promise_test(() => {
  return Promise.all(createAllSheetsPromise()).then(values => {
    const greenStyleSheet = values[0];
    const redStyleSheet = values[1];
    const blueStyleSheet = values[2];
    const whiteStyleSheet = values[3];
    const yellowStyleSheet = values[4];
    shadowRoot.adoptedStyleSheets = [whiteStyleSheet];
    assert_equals(getComputedStyle(greenShadowSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(redShadowSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(blueShadowSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(whiteShadowSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(yellowShadowSpan).color, "rgb(0, 0, 0)");

    shadowRoot.adoptedStyleSheets = [greenStyleSheet, blueStyleSheet];
    assert_equals(getComputedStyle(greenShadowSpan).color, "rgb(0, 128, 0)");
    assert_equals(getComputedStyle(redShadowSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(blueShadowSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(whiteShadowSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(yellowShadowSpan).color, "rgb(0, 0, 0)");

    shadowRoot.adoptedStyleSheets = [redStyleSheet, yellowStyleSheet];
    assert_equals(getComputedStyle(greenShadowSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(redShadowSpan).color, "rgb(255, 0, 0)");
    assert_equals(getComputedStyle(blueShadowSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(whiteShadowSpan).color, "rgb(255, 0, 0)");
    assert_equals(getComputedStyle(yellowShadowSpan).color, "rgb(255, 255, 0)");

    shadowRoot.adoptedStyleSheets = [redStyleSheet, yellowStyleSheet, greenStyleSheet, blueStyleSheet];
    assert_equals(getComputedStyle(greenShadowSpan).color, "rgb(0, 128, 0)");
    assert_equals(getComputedStyle(redShadowSpan).color, "rgb(255, 0, 0)");
    assert_equals(getComputedStyle(blueShadowSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(whiteShadowSpan).color, "rgb(255, 0, 0)");
    assert_equals(getComputedStyle(yellowShadowSpan).color, "rgb(255, 255, 0)");
  });
}, 'Constructed style sheets can be applied on shadow root');

promise_test(() => {
  return Promise.all(createAllSheetsPromise()).then(values => {
    const greenStyleSheet = values[0];
    const redStyleSheet = values[1];
    shadowRoot.adoptedStyleSheets = [greenStyleSheet];
    assert_equals(getComputedStyle(greenShadowSpan).color, "rgb(0, 128, 0)", "Style applies connected");
    assert_equals(getComputedStyle(redShadowSpan).color, "rgb(0, 0, 0)", "Style applies when connected");
    let hostParent = shadowHost.parentNode;
    hostParent.removeChild(shadowHost);
    assert_equals(getComputedStyle(greenShadowSpan).color, "", "Style doesn't apply when detached");
    assert_equals(getComputedStyle(redShadowSpan).color, "", "Style doesn't apply when detached");
    shadowRoot.adoptedStyleSheets = [redStyleSheet, greenStyleSheet];
    hostParent.appendChild(shadowHost);
    assert_equals(getComputedStyle(greenShadowSpan).color, "rgb(0, 128, 0)", "Style applies after reattach");
    assert_equals(getComputedStyle(redShadowSpan).color, "rgb(255, 0, 0)", "Style applies after reattach");
  });
}, 'Re-attaching shadow host with adopted stylesheets work');

test(() => {
  const sheet = new CSSStyleSheet();
  sheet.replaceSync(":host { color: red; }");
  const host = document.createElement("div");
  let sr = host.attachShadow({mode: "open"});
  sr.adoptedStyleSheets = [sheet];
  document.body.appendChild(host);
  assert_equals(getComputedStyle(host).color, "rgb(255, 0, 0)", "Style applies when connected");
  sheet.replaceSync(":host { color: blue; }");
  assert_equals(getComputedStyle(host).color, "rgb(0, 0, 255)", "Style update applies when connected");
}, 'Attaching a shadow root that already has adopted stylesheets work');

test(() => {
  const sheet = new CSSStyleSheet();
  sheet.replaceSync(":host([red]) { color: red; } :host(.blue) { color: blue; }");
  const host = document.createElement("div");
  host.toggleAttribute("red");
  document.body.appendChild(host);
  assert_equals(getComputedStyle(host).color, "rgb(0, 0, 0)", "No style applies yet");

  let sr = host.attachShadow({mode: "open"});
  sr.adoptedStyleSheets = [sheet];

  assert_equals(getComputedStyle(host).color, "rgb(255, 0, 0)", "Style applies after adding style");
  document.body.removeChild(host);
  document.body.appendChild(host);
  assert_equals(getComputedStyle(host).color, "rgb(255, 0, 0)", "Style applies after reattachment");
  host.toggleAttribute("red");
  assert_equals(getComputedStyle(host).color, "rgb(0, 0, 0)", "Attribute updates to the element after reattachment apply");
  host.classList.toggle("blue");
  assert_equals(getComputedStyle(host).color, "rgb(0, 0, 255)", "Class updates to the element after reattachment apply");

}, "Re-attaching shadow host and updating attributes work");

promise_test(() => {
  const plainSheet = new CSSStyleSheet();
  const redStyleSheetPromise = plainSheet.replace(redStyleTexts[0]);
  return redStyleSheetPromise.then(function(redStyleSheet) {
    document.adoptedStyleSheets = [redStyleSheet];
    assert_equals(getComputedStyle(greenSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(redSpan).color, "rgb(255, 0, 0)");
    assert_equals(getComputedStyle(blueSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(whiteSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(yellowSpan).color, "rgb(0, 0, 0)");

    redStyleSheet.insertRule(redStyleTexts[1]);
    assert_equals(getComputedStyle(greenSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(redSpan).color, "rgb(255, 0, 0)");
    assert_equals(getComputedStyle(blueSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(whiteSpan).color, "rgb(255, 0, 0)");
    assert_equals(getComputedStyle(yellowSpan).color, "rgb(0, 0, 0)");

    redStyleSheet.deleteRule(1);
    assert_equals(getComputedStyle(greenSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(redSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(blueSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(whiteSpan).color, "rgb(255, 0, 0)");
    assert_equals(getComputedStyle(yellowSpan).color, "rgb(0, 0, 0)");

    redStyleSheet.cssRules[0].style.color = "white";
    assert_equals(getComputedStyle(greenSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(redSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(blueSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(whiteSpan).color, "rgb(255, 255, 255)");
    assert_equals(getComputedStyle(yellowSpan).color, "rgb(0, 0, 0)");
});
}, 'Changes to constructed stylesheets through CSSOM is reflected');

promise_test(() => {
  const plainSheet = new CSSStyleSheet();
  const redStyleSheetPromise = plainSheet.replace(redStyleTexts[0]);
  return redStyleSheetPromise.then(function(redStyleSheet) {
    document.adoptedStyleSheets = [redStyleSheet];
    shadowRoot.adoptedStyleSheets = [redStyleSheet];
    assert_equals(getComputedStyle(greenSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(redSpan).color, "rgb(255, 0, 0)");
    assert_equals(getComputedStyle(blueSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(whiteSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(yellowSpan).color, "rgb(0, 0, 0)");

    assert_equals(getComputedStyle(greenShadowSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(redShadowSpan).color, "rgb(255, 0, 0)");
    assert_equals(getComputedStyle(blueShadowSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(whiteShadowSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(yellowShadowSpan).color, "rgb(0, 0, 0)");

    shadowRoot.adoptedStyleSheets[0].insertRule(redStyleTexts[1]);
    assert_equals(getComputedStyle(greenSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(redSpan).color, "rgb(255, 0, 0)");
    assert_equals(getComputedStyle(blueSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(whiteSpan).color, "rgb(255, 0, 0)");
    assert_equals(getComputedStyle(yellowSpan).color, "rgb(0, 0, 0)");

    assert_equals(getComputedStyle(greenShadowSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(redShadowSpan).color, "rgb(255, 0, 0)");
    assert_equals(getComputedStyle(blueShadowSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(whiteShadowSpan).color, "rgb(255, 0, 0)");
    assert_equals(getComputedStyle(yellowShadowSpan).color, "rgb(0, 0, 0)");
    document.adoptedStyleSheets = [];
  });
}, 'Constructed stylesheet can be used and modified in multiple TreeScopes');

promise_test(() => {
  const iframe = document.createElement("iframe");
  document.body.appendChild(iframe);
  const thirdDiv = firstDiv.cloneNode(true);
  iframe.contentDocument.body.appendChild(thirdDiv);
  const greenIframeSpan = thirdDiv.children[0];
  const redIframeSpan = thirdDiv.children[1];
  const blueIframeSpan = thirdDiv.children[2];
  const whiteIframeSpan = thirdDiv.children[3];
  const yellowIframeSpan = thirdDiv.children[4];

  const plainSheet = new CSSStyleSheet();
  const redStyleSheetPromise = plainSheet.replace(redStyleTexts[0]);
  return redStyleSheetPromise.then(function(redStyleSheet) {
    assert_throws_dom(
      'NotAllowedError',
      iframe.contentWindow.DOMException,
      () => { iframe.contentDocument.adoptedStyleSheets = [redStyleSheet]; }
    );
    assert_equals(getComputedStyle(greenIframeSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(redIframeSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(blueIframeSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(whiteIframeSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(yellowIframeSpan).color, "rgb(0, 0, 0)");

    document.adoptedStyleSheets = [redStyleSheet];
    assert_equals(getComputedStyle(greenSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(redSpan).color, "rgb(255, 0, 0)");
    assert_equals(getComputedStyle(blueSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(whiteSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(yellowSpan).color, "rgb(0, 0, 0)");

    document.adoptedStyleSheets[0].insertRule(redStyleTexts[1]);
    assert_equals(getComputedStyle(greenSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(redSpan).color, "rgb(255, 0, 0)");
    assert_equals(getComputedStyle(blueSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(whiteSpan).color, "rgb(255, 0, 0)");
    assert_equals(getComputedStyle(yellowSpan).color, "rgb(0, 0, 0)");
  });
}, 'Stylesheets constructed on the main Document cannot be used in iframes');

promise_test(async () => {
  const iframe = document.createElement("iframe");
  const iframeLoaded = new Promise(resolve => iframe.addEventListener("load", resolve));
  document.body.appendChild(iframe);
  await iframeLoaded;
  const thirdDiv = firstDiv.cloneNode(true);
  iframe.contentDocument.body.appendChild(thirdDiv);
  const greenIframeSpan = thirdDiv.children[0];
  const redIframeSpan = thirdDiv.children[1];
  const blueIframeSpan = thirdDiv.children[2];
  const whiteIframeSpan = thirdDiv.children[3];
  const yellowIframeSpan = thirdDiv.children[4];

  // Make sure both the main Document and the iframe are not styled
  const emptyStyleSheet = new CSSStyleSheet();
  document.adoptedStyleSheets = [emptyStyleSheet];
  assert_equals(getComputedStyle(greenSpan).color, "rgb(0, 0, 0)");
  assert_equals(getComputedStyle(redSpan).color, "rgb(0, 0, 0)");
  assert_equals(getComputedStyle(blueSpan).color, "rgb(0, 0, 0)");
  assert_equals(getComputedStyle(whiteSpan).color, "rgb(0, 0, 0)");
  assert_equals(getComputedStyle(yellowSpan).color, "rgb(0, 0, 0)");

  assert_equals(getComputedStyle(greenIframeSpan).color, "rgb(0, 0, 0)");
  assert_equals(getComputedStyle(redIframeSpan).color, "rgb(0, 0, 0)");
  assert_equals(getComputedStyle(blueIframeSpan).color, "rgb(0, 0, 0)");
  assert_equals(getComputedStyle(whiteIframeSpan).color, "rgb(0, 0, 0)");
  assert_equals(getComputedStyle(yellowIframeSpan).color, "rgb(0, 0, 0)");

  const iframePlainSheet = new iframe.contentWindow.CSSStyleSheet();
  const iframeRedStyleSheetPromise = iframePlainSheet.replace(redStyleTexts[0]);
  return iframeRedStyleSheetPromise.then(function(iframeRedStyleSheet) {
    assert_throws_dom('NotAllowedError', () => { document.adoptedStyleSheets = [iframeRedStyleSheet]; });
    assert_equals(getComputedStyle(greenSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(redSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(blueSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(whiteSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(yellowSpan).color, "rgb(0, 0, 0)");

    iframe.contentDocument.adoptedStyleSheets = [iframeRedStyleSheet];
    assert_equals(getComputedStyle(greenIframeSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(redIframeSpan).color, "rgb(255, 0, 0)");
    assert_equals(getComputedStyle(blueIframeSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(whiteIframeSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(yellowIframeSpan).color, "rgb(0, 0, 0)");

    iframe.contentDocument.adoptedStyleSheets[0].insertRule(redStyleTexts[1]);
    assert_equals(getComputedStyle(greenIframeSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(redIframeSpan).color, "rgb(255, 0, 0)");
    assert_equals(getComputedStyle(blueIframeSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(whiteIframeSpan).color, "rgb(255, 0, 0)");
    assert_equals(getComputedStyle(yellowIframeSpan).color, "rgb(0, 0, 0)");
  });
}, 'Stylesheet constructed on iframe cannot be used in the main Document');
</script>

<div id="divNonConstructed" class="nonConstructed">
</div>

<script>
`use strict`;
const shadowRootNonConstructed = divNonConstructed.attachShadow({mode:'open'})
nonConstructedStyle = document.createElement("style");
shadowRootNonConstructed.appendChild(nonConstructedStyle);
nonConstructedStyle.sheet.insertRule(".nonConstructed { color: red; }", 0);
const nonConstructedStyleSheet = nonConstructedStyle.sheet;

test(() => {
  assert_equals(getComputedStyle(divNonConstructed).color, "rgb(0, 0, 0)");
  assert_throws_dom('NotAllowedError', () => { document.adoptedStyleSheets = [nonConstructedStyleSheet]; });
}, 'Adding non-constructed stylesheet to AdoptedStyleSheets is not allowed when the owner document of the stylesheet is in the same document tree as the AdoptedStyleSheets');

test(() => {
  const iframe = document.createElement("iframe");
  document.body.appendChild(iframe);
  iframeDiv = iframe.contentDocument.createElement("div");
  iframeDiv.classList.add("nonConstructed");
  iframe.contentDocument.body.appendChild(iframeDiv);

  assert_equals(getComputedStyle(iframeDiv).color, "rgb(0, 0, 0)");
  assert_throws_dom('NotAllowedError', iframe.contentWindow.DOMException, () => {
    iframe.contentDocument.adoptedStyleSheets = [nonConstructedStyleSheet];
  });
  assert_equals(getComputedStyle(iframeDiv).color, "rgb(0, 0, 0)");

  iframeStyle = iframe.contentDocument.createElement("style");
  iframe.contentDocument.body.appendChild(iframeStyle);
  iframeStyle.sheet.insertRule(".nonConstructedSpan { color: red; }");
  const iframeStyleSheet = iframeStyle.sheet;
  nonConstructedSpan = document.createElement("span");
  nonConstructedSpan.classList.add(".nonConstructedSpan");
  divNonConstructed.appendChild(nonConstructedSpan);

  assert_equals(getComputedStyle(iframeDiv).color, "rgb(0, 0, 0)");
  assert_throws_dom('NotAllowedError', () => { document.adoptedStyleSheets = [iframeStyleSheet]; });
  assert_equals(getComputedStyle(iframeDiv).color, "rgb(0, 0, 0)");
}, 'Adding non-constructed stylesheet to AdoptedStyleSheets is not allowed when the owner document of the stylesheet and the AdoptedStyleSheets are in different document trees');

function attachShadowDiv(host) {
  const shadowRoot = host.attachShadow({mode: 'open'});
  const shadowDiv = document.createElement("div");
  shadowRoot.appendChild(shadowDiv);
  return shadowDiv;
}

test(() => {
  const sheet = new CSSStyleSheet();
  assert_equals(sheet.cssRules.length, 0);

  sheet.replaceSync(redStyleTexts[0])
  assert_equals(sheet.cssRules.length, 1);
  assert_equals(redStyleTexts[0], sheet.cssRules[0].cssText);

  sheet.replaceSync(redStyleTexts[1]);
  assert_equals(sheet.cssRules.length, 1);
  assert_equals(redStyleTexts[1], sheet.cssRules[0].cssText);
}, 'CSSStyleSheet.replaceSync replaces stylesheet text synchronously');

test(() => {
  // Attach a div inside a shadow root with the class ".red".
  const span = document.createElement("span");
  thirdSection.appendChild(span);
  const shadowDiv = attachShadowDiv(span);
  shadowDiv.classList.add("red");
  // Create empty stylesheet.
  const sheet = new CSSStyleSheet();
  span.shadowRoot.adoptedStyleSheets = [sheet];
  assert_equals(getComputedStyle(shadowDiv).color, "rgb(0, 0, 0)");
  // Replace the stylesheet text that will color it red.
  sheet.replaceSync(redStyleTexts[0]);
  assert_equals(getComputedStyle(shadowDiv).color, "rgb(255, 0, 0)");
  assert_equals(sheet.cssRules.length, 1);
  assert_equals(sheet.cssRules[0].cssText, redStyleTexts[0]);
  sheet.insertRule(redStyleTexts[1]);
  assert_equals(sheet.cssRules.length, 2);
  assert_equals(sheet.cssRules[0].cssText, redStyleTexts[1]);
}, 'CSSStyleSheet.replaceSync correctly updates the style of its adopters synchronously');

test(() => {
  // Attach a div inside a shadow root with the class ".red".
  const span = document.createElement("span");
  thirdSection.appendChild(span);
  const shadowDiv = attachShadowDiv(span);
  shadowDiv.classList.add("target");

  // Create empty stylesheet.
  const sheet = new CSSStyleSheet();
  span.shadowRoot.adoptedStyleSheets = [sheet];
  assert_equals(getComputedStyle(shadowDiv).color, "rgb(0, 0, 0)");

  // Replace the stylesheet text that will color it red.
  sheet.replaceSync(".target { color: red; }");
  assert_equals(getComputedStyle(shadowDiv).color, "rgb(255, 0, 0)");

  // Create a style element that will set colors to white.
  const style = document.createElement("style");
  style.textContent = ".target { color: white; }";
  span.shadowRoot.appendChild(style)
  assert_equals(getComputedStyle(shadowDiv).color, "rgb(255, 0, 0)", "non-adopted styles should be ordered before adopted styles");

  span.shadowRoot.adoptedStyleSheets = [];
  assert_equals(getComputedStyle(shadowDiv).color, "rgb(255, 255, 255)", "with no adopted styles in conflict, the non-adopted style should take effect");

  span.shadowRoot.adoptedStyleSheets = [sheet];
  assert_equals(getComputedStyle(shadowDiv).color, "rgb(255, 0, 0)", "the adopted style should be ordered after the non-adopted style");

  sheet.disabled = true;
  assert_equals(getComputedStyle(shadowDiv).color, "rgb(255, 255, 255)", "with the adopted sheet disabled, the non-adopted style should take effect");

  sheet.disabled = false;
  assert_equals(getComputedStyle(shadowDiv).color, "rgb(255, 0, 0)", "the adopted sheet re-enabled, it should take effect again");
}, 'Adopted sheets are ordered after non-adopted sheets in the shadow root')

test(() => {
  // Attach a div inside a shadow root with the class ".red".
  const span = document.createElement("span");
  thirdSection.appendChild(span);
  span.classList.add("target");

  // Create empty stylesheet.
  const sheet = new CSSStyleSheet();
  document.adoptedStyleSheets = [sheet];
  assert_equals(getComputedStyle(span).color, "rgb(0, 0, 0)");

  // Replace the stylesheet text that will color it red.
  sheet.replaceSync(".target { color: red; }");
  assert_equals(getComputedStyle(span).color, "rgb(255, 0, 0)");

  // Create a style element that will set colors to white.
  const style = document.createElement("style");
  style.textContent = ".target { color: white; }";
  span.appendChild(style)
  assert_equals(getComputedStyle(span).color, "rgb(255, 0, 0)", "non-adopted styles should be ordered before adopted styles");

  document.adoptedStyleSheets = [];
  assert_equals(getComputedStyle(span).color, "rgb(255, 255, 255)", "with no adopted styles in conflict, the non-adopted style should take effect");

  document.adoptedStyleSheets = [sheet];
  assert_equals(getComputedStyle(span).color, "rgb(255, 0, 0)", "the adopted style should be ordered after the non-adopted style");

  sheet.disabled = true;
  assert_equals(getComputedStyle(span).color, "rgb(255, 255, 255)", "with the adopted sheet disabled, the non-adopted style should take effect");

  sheet.disabled = false;
  assert_equals(getComputedStyle(span).color, "rgb(255, 0, 0)", "the adopted sheet re-enabled, it should take effect again")
}, 'Adopted sheets are ordered after non-adopted sheets in the document')

const import_text = '@import url("support/constructable-import.css");';

test(() => {
  assert_throws_dom("SyntaxError", () => { (new CSSStyleSheet).insertRule(import_text) });
}, 'Inserting an @import rule through insertRule on a constructed stylesheet throws an exception');

promise_test(t => {
    const importUrl = "support/constructable-import.css";
    const sheet = new CSSStyleSheet();

    sheet.replaceSync(`@import url("${importUrl}");`);

    const timeAfterReplaceSync = performance.now();
    let link = document.createElement("link");
    link.rel = "stylesheet";
    link.href = importUrl;

    return new Promise(resolve => {
      link.addEventListener("error", t.unreached_func("Load shouldn't fail"));
      link.addEventListener("load", t.step_func(() => {
        let entries = window.performance.getEntriesByType('resource').filter(entry => entry.name.includes(importUrl));
        assert_equals(entries.length, 1, "There should be only one entry for the import URL");
        assert_greater_than_equal(entries[0].startTime, timeAfterReplaceSync, "The entry's start time should be after replaceSync threw");
        link.remove();
        resolve();
      }));
      document.body.appendChild(link);
    });
}, "CSSStyleSheet.replaceSync should not trigger any loads from @import rules")

promise_test(() => {
  const span = document.createElement("span");
  thirdSection.appendChild(span);
  const shadowDiv = attachShadowDiv(span);
  const sheet = new CSSStyleSheet();
  span.shadowRoot.adoptedStyleSheets = [sheet];
  assert_equals(getComputedStyle(shadowDiv).color, "rgb(0, 0, 0)");
  // Replace and assert that the imported rule is NOT applied.
  const sheet_promise = sheet.replace(import_text);
  return sheet_promise.then((sheet) => {
    // replace() ignores @import rules:
    assert_equals(sheet.cssRules.length, 0);
    assert_equals(getComputedStyle(shadowDiv).color, "rgb(0, 0, 0)");
  }).catch((reason) => {
    assert_unreached(`Promise was rejected (${reason}) when it should have been resolved`);
  });
}, 'CSSStyleSheet.replace allows, but ignores, import rule inside');

promise_test(() => {
  const span = document.createElement("span");
  thirdSection.appendChild(span);
  const shadowDiv = attachShadowDiv(span);
  const targetSpan = document.createElement("span");
  targetSpan.classList.add("target");
  shadowDiv.appendChild(targetSpan);
  const sheet = new CSSStyleSheet();
  span.shadowRoot.adoptedStyleSheets = [sheet];
  assert_equals(getComputedStyle(shadowDiv).color, "rgb(0, 0, 0)");
  // Replace and assert that the imported rule is NOT applied, but regular rule does apply.
  const sheet_promise = sheet.replace(import_text + ".target { color: blue; }");
  return sheet_promise.then((sheet) => {
    assert_equals(sheet.cssRules.length, 1);
    // @import not applied:
    assert_equals(getComputedStyle(shadowDiv).color, "rgb(0, 0, 0)");
    // regular rule applied:
    assert_equals(getComputedStyle(targetSpan).color, "rgb(0, 0, 255)");
  }).catch((reason) => {
    assert_unreached(`Promise was rejected (${reason}) when it should have been resolved`);
  });
}, 'CSSStyleSheet.replace ignores @import rule but still loads other rules');

test(() => {
  const span = document.createElement("span");
  thirdSection.appendChild(span);
  const shadowDiv = attachShadowDiv(span);
  const sheet = new CSSStyleSheet();
  span.shadowRoot.adoptedStyleSheets = [sheet];
  assert_equals(getComputedStyle(shadowDiv).color, "rgb(0, 0, 0)");
  // Replace and assert that the imported rule is NOT applied.
  try {
    sheet.replaceSync(import_text);
    // replaceSync() ignores @import rules:
    assert_equals(sheet.cssRules.length, 0);
    assert_equals(getComputedStyle(shadowDiv).color, "rgb(0, 0, 0)");
  } catch(reason) {
    assert_unreached(`replaceSync threw an exception (${reason}) when it shouldn't have`);
  }
}, 'CSSStyleSheet.replaceSync allows, but ignores, import rule inside');

promise_test(() => {
  const sheet = new CSSStyleSheet();
  const sheet_promise = sheet.replace("@import url('not-there.css');");

  return sheet_promise.then((sheet) => {
    // No exception here
  }).catch((reason) => {
    assert_unreached("Promise was rejected");
  });
}, 'CSSStyleSheet.replace does not reject on failed imports');

test(() => {
  const span = document.createElement("span");
  thirdSection.appendChild(span);
  const shadowDiv = attachShadowDiv(span);
  const sheet = new CSSStyleSheet();
  span.shadowRoot.adoptedStyleSheets = [sheet];

  const newSpan = span.cloneNode(true);
  assert_equals(newSpan.shadowRoot, null);
}, 'Cloning a shadow host will not clone shadow root, and also adoptedStyleSheets');

test(() => {
  const span = document.createElement("span");
  thirdSection.appendChild(span);
  const shadowDiv = attachShadowDiv(span);
  const sheet = new CSSStyleSheet();
  span.shadowRoot.adoptedStyleSheets = [sheet];

  const iframe = document.createElement("iframe");
  document.body.appendChild(iframe);
  const newSpan = iframe.contentDocument.importNode(span, true);
  iframe.contentDocument.body.appendChild(newSpan);
  assert_equals(newSpan.shadowRoot, null);
}, 'Importing a shadow host will not copy shadow root, and also adoptedStyleSheets');

test(() => {
  const span = document.createElement("span");
  thirdSection.appendChild(span);
  const shadowDiv = attachShadowDiv(span);
  const sheet = new CSSStyleSheet();
  sheet.replaceSync("* { color: red; }");
  span.shadowRoot.adoptedStyleSheets = [sheet];
  assert_equals(getComputedStyle(shadowDiv).color, "rgb(255, 0, 0)");

  document.adoptNode(span);
  assert_equals(span.shadowRoot.adoptedStyleSheets.length, 1);
  assert_equals(span.shadowRoot.adoptedStyleSheets[0], sheet);

  const iframe = document.createElement("iframe");
  document.body.appendChild(iframe);
  iframe.contentDocument.adoptNode(span);
  iframe.contentDocument.body.appendChild(span);
  assert_not_equals(span.shadowRoot, null);
  assert_equals(span.shadowRoot.adoptedStyleSheets.length, 0);
  assert_equals(getComputedStyle(shadowDiv).color, "rgb(0, 0, 0)");
}, 'Adopting a shadow host will empty adoptedStyleSheets if adopting to a different document');

test(() => {
  const span = document.createElement("span");
  const div = document.createElement("div");
  thirdSection.appendChild(span);
  span.appendChild(div);
  const shadowDiv = attachShadowDiv(div);
  const sheet = new CSSStyleSheet();
  sheet.replaceSync("* { color: red; }");
  div.shadowRoot.adoptedStyleSheets = [sheet];
  assert_equals(getComputedStyle(shadowDiv).color, "rgb(255, 0, 0)");

  document.adoptNode(span);
  assert_equals(div.shadowRoot.adoptedStyleSheets.length, 1);
  assert_equals(div.shadowRoot.adoptedStyleSheets[0], sheet);

  const iframe = document.createElement("iframe");
  document.body.appendChild(iframe);
  iframe.contentDocument.adoptNode(span);
  iframe.contentDocument.body.appendChild(span);
  assert_not_equals(div.shadowRoot, null);
  assert_equals(div.shadowRoot.adoptedStyleSheets.length, 0);
  assert_equals(getComputedStyle(shadowDiv).color, "rgb(0, 0, 0)");
}, `Adopting a shadow host's ancestor will empty adoptedStyleSheets if adopting to a different document`);

test(() => {
  const host = document.createElement("div");
  const root = host.attachShadow({mode: "open"});
  root.adoptedStyleSheets = [new CSSStyleSheet()];
  document.body.offsetTop;
}, 'Forcing a style update after adding an adopted stylesheet on a disconnected shadow root should not crash.');

test(() => {
  const host = document.createElement("div");
  thirdSection.appendChild(host);
  const root = host.attachShadow({mode: "open"});
  const sheet = new CSSStyleSheet();
  root.adoptedStyleSheets = [sheet];
  host.remove();
  sheet.replaceSync('');
}, 'Modifying an adopted stylesheet on a disconnected shadow root should not crash.');

function currentLocation() {
  const sections = location.href.split("/")
  sections.pop();
  return sections.join("/");
}

test(() => {
  const span = document.createElement("span");
  thirdSection.appendChild(span);
  const shadowDiv = attachShadowDiv(span);

  const fileName = "example.png"
  const fullPath = `${currentLocation()}/${fileName}`

  const sheet = new CSSStyleSheet();
  span.shadowRoot.adoptedStyleSheets = [sheet];

  sheet.replaceSync(`* { background-image: url("${fileName}"); }`);
  const styleFromRelative = getComputedStyle(shadowDiv).backgroundImage;

  sheet.replaceSync(`* { background-image: url("${fullPath}"); }`);
  const styleFromFull = getComputedStyle(shadowDiv).backgroundImage;

  assert_equals(styleFromRelative, styleFromFull);
}, "Constructing a sheet with the default base URL uses the constructor document's base URL for CSS rules");

</script>