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Test Info:
/* Any copyright is dedicated to the Public Domain.
const PREF_DEVTOOLS_THEME = "devtools.theme";
registerCleanupFunction(() => {
// Set preferences back to their original values
Services.prefs.clearUserPref(PREF_DEVTOOLS_THEME);
});
add_task(async function testDevtoolsTheme() {
info("Checking stylesheet and :root attributes based on devtools theme.");
Services.prefs.setCharPref(PREF_DEVTOOLS_THEME, "light");
is(
document.getElementById("appcontent").getAttribute("devtoolstheme"),
"light",
"The element has an attribute based on devtools theme."
);
Services.prefs.setCharPref(PREF_DEVTOOLS_THEME, "dark");
is(
document.getElementById("appcontent").getAttribute("devtoolstheme"),
"dark",
"The element has an attribute based on devtools theme."
);
Services.prefs.setCharPref(PREF_DEVTOOLS_THEME, "unknown");
is(
document.getElementById("appcontent").getAttribute("devtoolstheme"),
"light",
"The element has 'light' as a default for the devtoolstheme attribute."
);
});