<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Selector Invalidation: :has() in adjacent position</title>
<link rel="author" title="Antti Koivisto" href="mailto:antti@apple.com">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<link rel="help" href="https://drafts.csswg.org/selectors/#relational">
<style>
div, main { color: grey }
div:has(.test) + #subject { color: red }
div:has([test_attr]) + #subject { color: orangered }
div:has(> .test) + #subject { color: green }
div:has(> [test_attr]) + #subject { color: lightgreen }
div:has(~ .test) + #subject { color: yellow }
div:has(~ [test_attr]) + #subject { color: ivory }
div:has(+ .test) + #subject { color: blue }
div:has(+ [test_attr]) + #subject { color: skyblue }
div:has(~ div .test) + #subject { color: purple }
div:has(~ div [test_attr]) + #subject { color: violet }
div:has(+ div .test) + #subject { color: pink }
div:has(+ div [test_attr]) + #subject { color: lightpink }
</style>

<main id=main>
    <div id=previous_sibling>
        <div id=previous_sibling_child>
            <div id=previous_sibling_descendant></div>
        </div>
    </div>
    <div id=subject></div>
    <div id=next_sibling>
        <div id=next_sibling_child>
            <div id=next_sibling_descendant></div>
        </div>
    </div>
</main>

<script>
const grey = 'rgb(128, 128, 128)';
const red = 'rgb(255, 0, 0)';
const orangered = 'rgb(255, 69, 0)';
const green = 'rgb(0, 128, 0)';
const lightgreen = 'rgb(144, 238, 144)';
const blue = 'rgb(0, 0, 255)';
const skyblue = 'rgb(135, 206, 235)';
const yellow = 'rgb(255, 255, 0)';
const ivory = 'rgb(255, 255, 240)';
const purple = 'rgb(128, 0, 128)';
const violet = 'rgb(238, 130, 238)';
const pink = 'rgb(255, 192, 203)';
const lightpink = 'rgb(255, 182, 193)';
const colors = {
  grey: {
    classTest: grey,
    attributeTest: grey,
  },
  red: {
    classTest: red,
    attributeTest: orangered,
  },
  green: {
    classTest: green,
    attributeTest: lightgreen,
  },
  blue: {
    classTest: blue,
    attributeTest: skyblue,
  },
  yellow: {
    classTest: yellow,
    attributeTest: ivory,
  },
  purple: {
    classTest: purple,
    attributeTest: violet,
  },
  pink: {
    classTest: pink,
    attributeTest: lightpink,
  },
};

function testColor(test_name, color) {
    test(function() {
        assert_equals(getComputedStyle(subject).color, color);
    }, test_name);
}

function testClassChange(element, expectedColorName)
{
    const expectedColorForClassTest = colors[expectedColorName].classTest;
    element.classList.add('test');
    testColor(`add .test to ${element.id}`, expectedColorForClassTest);
    element.classList.remove('test');
    testColor(`remove .test from ${element.id}`, grey);
}

function testElementInsertionBefore(beforeElement, expectedColorName)
{
    const expectedColorForClassTest = colors[expectedColorName].classTest;
    const expectedColorForAttributeTest = colors[expectedColorName].attributeTest;
    const newElement = document.createElement('div');
    newElement.classList.add('test')

    beforeElement.before(newElement);
    testColor(`insert element div.test before ${beforeElement.id}`, expectedColorForClassTest);

    newElement.classList.remove('test');
    testColor(`remove the class 'test' from the element inserted before ${beforeElement.id}`, grey);

    newElement.classList.add('test');
    testColor(`add the class 'test' again to the element inserted before ${beforeElement.id}`, expectedColorForClassTest);

    newElement.remove();
    testColor(`remove element div.test before ${beforeElement.id}`, grey);

    newElement.classList.remove('test');

    beforeElement.before(newElement);
    testColor(`insert element div before ${beforeElement.id}`, grey);

    newElement.classList.add('test');
    testColor(`add the class 'test' to the element inserted again before ${beforeElement.id}`, expectedColorForClassTest);

    newElement.classList.remove('test');
    testColor(`remove the class 'test' from the element inserted again before ${beforeElement.id}`, grey);

    newElement.remove();
    testColor(`remove element div before ${beforeElement.id}`, grey);

    newElement.setAttribute('test_attr', '');

    beforeElement.before(newElement);
    testColor(`insert element div[test_attr] before ${beforeElement.id}`, expectedColorForAttributeTest);

    newElement.remove();
    testColor(`remove element div[test_attr] before ${beforeElement.id}`, grey);
}

function testElementInsertionAfter(afterElement, expectedColorName)
{
    const expectedColorForClassTest = colors[expectedColorName].classTest;
    const expectedColorForAttributeTest = colors[expectedColorName].attributeTest;
    const newElement = document.createElement('div');
    newElement.classList.add('test')

    afterElement.after(newElement);
    testColor(`insert element div.test after ${afterElement.id}`, expectedColorForClassTest);

    newElement.classList.remove('test');
    testColor(`remove the class 'test' from the element inserted after ${afterElement.id}`, grey);

    newElement.classList.add('test');
    testColor(`add the class 'test' again to the element inserted after ${afterElement.id}`, expectedColorForClassTest);

    newElement.remove();
    testColor(`remove element div.test after ${afterElement.id}`, grey);

    newElement.classList.remove('test');

    afterElement.after(newElement);
    testColor(`insert element div after ${afterElement.id}`, grey);

    newElement.classList.add('test');
    testColor(`add the class 'test' to the element inserted again after ${afterElement.id}`, expectedColorForClassTest);

    newElement.classList.remove('test');
    testColor(`remove the class 'test' from the element inserted again after ${afterElement.id}`, grey);

    newElement.remove();
    testColor(`remove element div after ${afterElement.id}`, grey);

    newElement.setAttribute('test_attr', '');

    afterElement.after(newElement);
    testColor(`insert element div[test_attr] after ${afterElement.id}`, expectedColorForAttributeTest);

    newElement.remove();
    testColor(`remove element div[test_attr] after ${afterElement.id}`, grey);
}

function testTreeInsertionBefore(beforeElement, expectedColorName)
{
    const expectedColorForClassTest = colors[expectedColorName].classTest;
    const expectedColorForAttributeTest = colors[expectedColorName].attributeTest;
    const newElement = document.createElement('div');
    const newChild = document.createElement('div');
    newChild.classList.add('test');
    newElement.appendChild(newChild);

    beforeElement.before(newElement);
    testColor(`insert tree div>div.test before ${beforeElement.id}`, expectedColorForClassTest);

    newChild.classList.remove('test');
    testColor(`remove the class 'test' from the element in the tree inserted before ${beforeElement.id}`, grey);

    newChild.classList.add('test');
    testColor(`add the class 'test' again to the element in the tree inserted before ${beforeElement.id}`, expectedColorForClassTest);

    newElement.remove();
    testColor(`remove tree div>div.test before ${beforeElement.id}`, grey);

    newChild.classList.remove('test');

    beforeElement.before(newElement);
    testColor(`insert tree div>div before ${beforeElement.id}`, grey);

    newChild.classList.add('test');
    testColor(`add the class 'test' to the element in the tree inserted again before ${beforeElement.id}`, expectedColorForClassTest);

    newChild.classList.remove('test');
    testColor(`remove the class 'test' from the element in the tree inserted again before ${beforeElement.id}`, grey);

    newElement.remove();
    testColor(`remove tree div>div before ${beforeElement.id}`, grey);

    newChild.setAttribute('test_attr', '');

    beforeElement.before(newElement);
    testColor(`insert element div>div[test_attr] before ${beforeElement.id}`, expectedColorForAttributeTest);

    newElement.remove();
    testColor(`remove element div>div[test_attr] before ${beforeElement.id}`, grey);
}

function testTreeInsertionAfter(afterElement, expectedColorName)
{
    const expectedColorForClassTest = colors[expectedColorName].classTest;
    const expectedColorForAttributeTest = colors[expectedColorName].attributeTest;
    const newElement = document.createElement('div');
    const newChild = document.createElement('div');
    newChild.classList.add('test');
    newElement.appendChild(newChild);

    afterElement.after(newElement);
    testColor(`insert tree div>div.test after ${afterElement.id}`, expectedColorForClassTest);

    newChild.classList.remove('test');
    testColor(`remove the class 'test' from the element in the tree inserted after ${afterElement.id}`, grey);

    newChild.classList.add('test');
    testColor(`add the class 'test' again to the element in the tree inserted after ${afterElement.id}`, expectedColorForClassTest);

    newElement.remove();
    testColor(`remove tree div>div.test after ${afterElement.id}`, grey);

    newChild.classList.remove('test');

    afterElement.after(newElement);
    testColor(`insert tree div>div after ${afterElement.id}`, grey);

    newChild.classList.add('test');
    testColor(`add the class 'test' to the element in the tree inserted again after ${afterElement.id}`, expectedColorForClassTest);

    newChild.classList.remove('test');
    testColor(`remove the class 'test' from the element in the tree inserted again after ${afterElement.id}`, grey);

    newElement.remove();
    testColor(`remove tree div>div after ${afterElement.id}`, grey);

    newChild.setAttribute('test_attr', '');

    afterElement.after(newElement);
    testColor(`insert element div>div[test_attr] after ${afterElement.id}`, expectedColorForAttributeTest);

    newElement.remove();
    testColor(`remove element div>div[test_attr] after ${afterElement.id}`, grey);
}

testColor('Initial color', grey);

testClassChange(previous_sibling, "grey");
testClassChange(previous_sibling_child, "green");
testClassChange(previous_sibling_descendant, "red");
testClassChange(subject, "blue");
testClassChange(next_sibling, "yellow");
testClassChange(next_sibling_child, "purple");
testClassChange(next_sibling_descendant, "purple");

testElementInsertionBefore(previous_sibling, "grey");
testElementInsertionBefore(previous_sibling_child, "green");
testElementInsertionBefore(previous_sibling_descendant, "red");
testElementInsertionBefore(subject, "grey");
testElementInsertionBefore(next_sibling, "yellow");
testElementInsertionBefore(next_sibling_child, "purple");
testElementInsertionBefore(next_sibling_descendant, "purple");

testElementInsertionAfter(previous_sibling, "grey");
testElementInsertionAfter(previous_sibling_child, "green");
testElementInsertionAfter(previous_sibling_descendant, "red");
testElementInsertionAfter(subject, "yellow");
testElementInsertionAfter(next_sibling, "yellow");
testElementInsertionAfter(next_sibling_child, "purple");
testElementInsertionAfter(next_sibling_descendant, "purple");

testTreeInsertionBefore(previous_sibling, "grey");
testTreeInsertionBefore(previous_sibling_child, "red");
testTreeInsertionBefore(previous_sibling_descendant, "red");
testTreeInsertionBefore(subject, "green");
testTreeInsertionBefore(next_sibling, "purple");
testTreeInsertionBefore(next_sibling_child, "purple");
testTreeInsertionBefore(next_sibling_descendant, "purple");

testTreeInsertionAfter(previous_sibling, "green");
testTreeInsertionAfter(previous_sibling_child, "red");
testTreeInsertionAfter(previous_sibling_descendant, "red");
testTreeInsertionAfter(subject, "purple");
testTreeInsertionAfter(next_sibling, "purple");
testTreeInsertionAfter(next_sibling_child, "purple");
testTreeInsertionAfter(next_sibling_descendant, "purple");

</script>
