tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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browser_focus_steal_from_chrome_during_mousedown.js (2570B)

      1 add_task(async function test() {
      2  const kTestURI =
      3    "data:text/html," +
      4    '<script type="text/javascript">' +
      5    "  function onMouseDown(aEvent) {" +
      6    "    document.getElementById('willBeFocused').focus();" +
      7    "    aEvent.preventDefault();" +
      8    "  }" +
      9    "</script>" +
     10    '<body id="body">' +
     11    '<button onmousedown="onMouseDown(event);" style="width: 100px; height: 100px;">click here</button>' +
     12    '<input id="willBeFocused"></body>';
     13 
     14  let tab = await BrowserTestUtils.openNewForegroundTab(gBrowser, kTestURI);
     15 
     16  let fm = Services.focus;
     17 
     18  for (var button = 0; button < 3; button++) {
     19    // Set focus to a chrome element before synthesizing a mouse down event.
     20    gURLBar.focus();
     21 
     22    is(
     23      fm.focusedElement,
     24      gURLBar.inputField,
     25      "Failed to move focus to search bar: button=" + button
     26    );
     27 
     28    // We intentionally turn off this a11y check, because the following click
     29    // is sent on an arbitrary web content that is not expected to be tested
     30    // by itself with the browser mochitests, therefore this rule check shall
     31    // be ignored by a11y-checks suite.
     32    AccessibilityUtils.setEnv({ mustHaveAccessibleRule: false });
     33    // Synthesize mouse down event on browser object over the button, such that
     34    // the event propagates through both processes.
     35    EventUtils.synthesizeMouse(tab.linkedBrowser, 20, 20, { button });
     36    AccessibilityUtils.resetEnv();
     37 
     38    isnot(
     39      fm.focusedElement,
     40      gURLBar.inputField,
     41      "Failed to move focus away from search bar: button=" + button
     42    );
     43 
     44    await SpecialPowers.spawn(
     45      tab.linkedBrowser,
     46      [button],
     47      async function (button) {
     48        let fm = Services.focus;
     49 
     50        let attempts = 10;
     51        await new Promise(resolve => {
     52          function check() {
     53            if (
     54              attempts > 0 &&
     55              content.document.activeElement.id != "willBeFocused"
     56            ) {
     57              attempts--;
     58              content.window.setTimeout(check, 100);
     59              return;
     60            }
     61 
     62            Assert.equal(
     63              content.document.activeElement.id,
     64              "willBeFocused",
     65              "The input element isn't active element: button=" + button
     66            );
     67            Assert.equal(
     68              fm.focusedElement,
     69              content.document.activeElement,
     70              "The active element isn't focused element in App level: button=" +
     71                button
     72            );
     73            resolve();
     74          }
     75          check();
     76        });
     77      }
     78    );
     79  }
     80 
     81  gBrowser.removeTab(tab);
     82 });