Codebase Browser
chromium
Go to App

chromium/third_party/blink/web_tests/editing/selection/triple-click-in-pre.html 

<!doctype html>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="../assert_selection.js"></script>
<script>
// The triple click should select the entire line.
selection_test(
    '<pre contenteditable id="target">this text is in whitespace:pre</pre>',
    selection => {
        if (!window.eventSender)
          throw 'This test requires eventSender.';

        const elem = selection.document.getElementById('target');

        // x, y should be a position on the second line (after whitespace:pre).
        const x = elem.offsetLeft + elem.offsetWidth - 30;
        const y = elem.offsetTop + elem.offsetHeight / 2 + 10;

        eventSender.mouseMoveTo(x, y);
        eventSender.mouseDown();
        eventSender.mouseUp();
        eventSender.mouseDown();
        eventSender.mouseUp();
        eventSender.mouseDown();
        eventSender.mouseUp();
    },
    '<pre contenteditable id="target">^this text is in whitespace:pre|</pre>');
</script>