browser/base/content/test/tabMediaIndicator/browser_mute2.js


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const PAGE = "data:text/html,page";

async function test_on_browser(browser) {
  ok(!browser.audioMuted, "Audio should not be muted by default");
  browser.mute();
  ok(browser.audioMuted, "Audio should be muted now");

  await BrowserTestUtils.withNewTab(
    {
      gBrowser,
      url: PAGE,
    },
    test_on_browser2
  );

  browser.unmute();
  ok(!browser.audioMuted, "Audio should be unmuted now");
}

function test_on_browser2(browser) {
  ok(!browser.audioMuted, "Audio should not be muted by default");
}

add_task(async function() {
  await BrowserTestUtils.withNewTab(
    {
      gBrowser,
      url: PAGE,
    },
    test_on_browser
  );
});