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Test Info:
- Manifest: layout/inspector/tests/mochitest.toml
<!DOCTYPE HTML>
<html>
<head>
<title>Test InspectorUtils.parseStyleSheet with nested rules</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<style>
h1 {
.mySpan {
background: gold;
&.mySpan {
color: red;
}
}
}
</style>
</head>
<body>
<h1>Hello<span class="mySpan">world</span>
<script>
add_task(function() {
info("Flush layout");
// This is important to reproduce the original issue
document.documentElement.getBoundingClientRect();
const InspectorUtils = SpecialPowers.InspectorUtils;
const sheet = document.styleSheets[0];
const spanEl = document.querySelector(".mySpan");
is(
sheet.cssRules[0].cssRules[0].cssRules[0].cssText,
`&.mySpan { color: red; }`,
"Nested rule has expected initial text"
);
is(
InspectorUtils.getMatchingCSSRules(spanEl).length,
2,
"getMatchingCSSRules returned 2 rules for .mySpan"
);
info("Modify stylesheet using InspectorUtils.parseStyleSheet");
InspectorUtils.parseStyleSheet(
sheet,
`h1 {
.mySpan {
background: gold;
&.mySpan {
color: black;
}
}
}`
);
is(
sheet.cssRules[0].cssRules[0].cssRules[0].cssText,
`&.mySpan { color: black; }`,
"Nested rule has expected text after updating the stylesheet"
);
info("Flush layout");
// This is important to reproduce the original issue
document.documentElement.getBoundingClientRect();
is(
getComputedStyle(spanEl).color,
"rgb(0, 0, 0)",
"the color of the span element was properly updated"
);
const rules = InspectorUtils.getMatchingCSSRules(spanEl);
is(
rules.length,
2,
"getMatchingCSSRules still returned 2 rules for .mySpan after stylesheet was updated"
);
is(rules[1].style.color, "black", "rule was properly updated");
});
</script>
</body>
</html>