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Test Info:
/* Any copyright is dedicated to the Public Domain.
"use strict";
// Test that the rule-view content is correct when the page defines nested at-rules (@media, @layer, @supports, …)
const TEST_URI = `
<style type="text/css">
body {
container: mycontainer / inline-size;
}
@layer mylayer {
@supports (container-name: mycontainer) {
@container mycontainer (min-width: 1px) {
@media screen {
@container mycontainer (min-width: 2rem) {
h1, [test-hint="nested"] {
background: gold;
}
}
}
}
}
}
</style>
<h1>Hello nested at-rules!</h1>
`;
add_task(async function () {
await pushPref("layout.css.container-queries.enabled", true);
await addTab(
encodeURIComponent(TEST_URI)
);
const { inspector, view } = await openRuleView();
await selectNode("h1", inspector);
const expectedRules = [
{ selector: "element", ancestorRulesData: null },
{
selector: `h1, [test-hint="nested"]`,
ancestorRulesData: [
`@layer mylayer {`,
` @supports (container-name: mycontainer) {`,
` @container mycontainer (min-width: 1px) {`,
` @media screen {`,
` @container mycontainer (min-width: 2rem) {`,
],
},
];
const rulesInView = Array.from(view.element.children);
is(
rulesInView.length,
expectedRules.length,
"All expected rules are displayed"
);
for (let i = 0; i < expectedRules.length; i++) {
const expectedRule = expectedRules[i];
info(`Checking rule #${i}: ${expectedRule.selector}`);
const selector = rulesInView[i].querySelector(
".ruleview-selectors-container"
).innerText;
is(selector, expectedRule.selector, `Expected selector for ${selector}`);
if (expectedRule.ancestorRulesData == null) {
is(
getRuleViewAncestorRulesDataElementByIndex(view, i),
null,
`No ancestor rules data displayed for ${selector}`
);
} else {
is(
getRuleViewAncestorRulesDataTextByIndex(view, i),
expectedRule.ancestorRulesData.join("\n"),
`Expected ancestor rules data displayed for ${selector}`
);
}
}
});