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Test Info:
/* Any copyright is dedicated to the Public Domain.
"use strict";
// Test matched selectors and variables defined for a :host selector.
const SHADOW_DOM = `<style>
:host {
--test-color: red;
}
span {
color: var(--test-color);
}
</style>
<span class="test-span">test</span>`;
const TEST_PAGE = `
<div id="host"></div>
<script>
const div = document.querySelector("div");
div.attachShadow({ mode: "open" }).innerHTML = \`${SHADOW_DOM}\`;
</script>`;
TEST_PAGE
)}`;
add_task(async function () {
await addTab(TEST_URI);
const { inspector, view } = await openRuleView();
info("Select the host and check that :host is matching");
await selectNode("#host", inspector);
let selector = getRuleViewRuleEditor(view, 1).selectorText;
is(
selector.querySelector(".matched").textContent,
":host",
":host should be matched."
);
info("Select a shadow dom element and check that :host is matching");
const nodeFront = await getNodeFrontInShadowDom(
".test-span",
"#host",
inspector
);
await selectNode(nodeFront, inspector);
selector = getRuleViewRuleEditor(view, 3).selectorText;
is(
selector.querySelector(".matched").textContent,
":host",
":host should be matched."
);
info("Check that the variable from :host is correctly applied");
const setColor = getRuleViewProperty(
view,
"span",
"color"
).valueSpan.querySelector(".inspector-variable");
is(setColor.textContent, "--test-color", "--test-color is set correctly");
is(
setColor.dataset.variable,
"red",
"--test-color's dataset.variable is set correctly"
);
const previewTooltip = await assertShowPreviewTooltip(view, setColor);
ok(
previewTooltip.panel.textContent.includes("red"),
"CSS variable preview tooltip shows the expected CSS variable"
);
await assertTooltipHiddenOnMouseOut(previewTooltip, setColor);
});