chromium/src/third_party/blink/web_tests/editing/selection/select_all/select_all_input.html - manifest_repos/chromium_src - Git at Google

 <!doctype html>
 <script src="../../../resources/testharness.js"></script>
 <script src="../../../resources/testharnessreport.js"></script>
 <input id="input"></input>
 <script>
 test(function() {
     var input = document.getElementById('input');
     input.focus();
     assert_false(document.queryCommandEnabled('SelectAll'));

     input.value = 'x';
     input.focus();
     assert_true(document.queryCommandEnabled('SelectAll'));
 }, 'SelectAll is not enabled if input is empty');
 </script>
	<!doctype html>
	<script src="../../../resources/testharness.js"></script>
	<script src="../../../resources/testharnessreport.js"></script>
	<input id="input"></input>
	<script>
	test(function() {
	var input = document.getElementById('input');
	input.focus();
	assert_false(document.queryCommandEnabled('SelectAll'));

	input.value = 'x';
	input.focus();
	assert_true(document.queryCommandEnabled('SelectAll'));
	}, 'SelectAll is not enabled if input is empty');
	</script>