ManualTests/inspector/console-assert.html - WebKit - Git at Google

 <script>
     function createClickHandler(result, str) {
         return function() {
             console.assert(result, "%s", str);
         }
     }

     function load() {
         var tests = [
             "",
             "false",
             "null",
             "document.body",
             "!document.body",
             "true"
         ];

         for (var i = 0; i < tests.length; ++i) {
             var test = tests[i];
             var result;
             try {
                 result = eval(test);
             } catch(e) {
                 result = false;
             }
             var button = document.createElement("button");
             button.innerText = "console.assert(" + test + "): should" + (result ? " not" : "") + " assert";
             button.onclick = createClickHandler(result, test);
             var p = document.createElement("p");
             p.appendChild(button);
             document.body.appendChild(p);
         }
     }
 </script>
 <body onload="load()">
 <p>Test for <a href="https://bugs.webkit.org/show_bug.cgi?id=19134">Bug 19134: Inspector should support console.assert</a>.</p>
 <p>To test, click the buttons below and look at the Inspector's Console.</p>
	<script>
	function createClickHandler(result, str) {
	return function() {
	console.assert(result, "%s", str);
	}
	}

	function load() {
	var tests = [
	"",
	"false",
	"null",
	"document.body",
	"!document.body",
	"true"
	];

	for (var i = 0; i < tests.length; ++i) {
	var test = tests[i];
	var result;
	try {
	result = eval(test);
	} catch(e) {
	result = false;
	}
	var button = document.createElement("button");
	button.innerText = "console.assert(" + test + "): should" + (result ? " not" : "") + " assert";
	button.onclick = createClickHandler(result, test);
	var p = document.createElement("p");
	p.appendChild(button);
	document.body.appendChild(p);
	}
	}
	</script>
	<body onload="load()">
	<p>Test for <a href="https://bugs.webkit.org/show_bug.cgi?id=19134">Bug 19134: Inspector should support console.assert</a>.</p>
	<p>To test, click the buttons below and look at the Inspector's Console.</p>