LayoutTests/js/console.html

<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
<html>
<head>
<script src="../resources/js-test-pre.js"></script>
</head>
<body>
<script>
shouldBeEqualToString("typeof console", "object");
shouldBeEqualToString("console.toString()", "[object console]");
shouldBe("console", "console");

// <https://webkit.org/b/157782> console namespace breaks putting properties on console.__proto__
shouldNotBe("Object.getPrototypeOf(console)", "Object.getPrototypeOf({})");

var consoleDescriptor = Object.getOwnPropertyDescriptor(window, "console");
shouldBeTrue('consoleDescriptor.configurable');
shouldBeTrue('consoleDescriptor.writable');
shouldBeFalse('consoleDescriptor.enumerable');

// Console methods don't care what their this object is.
console.log("log message");
console.log.call(null, "log message");
console.log.call(undefined, "log message");
console.log.call(console, "log message");
console.log.call(123, "log message");
console.log.call("ignore", "log message");
console.log.bind(console, "log message");
console.log.bind(console)("log message");
[1,2,3].forEach(console.log);

// All properties should be enumerable.
var property, descriptor;
var enumerablePropertyCount = 0;
for (property in console) {
    enumerablePropertyCount++;
    descriptor = Object.getOwnPropertyDescriptor(console, property);

    debug("");
    debug(`console.${property}`);
    shouldBeEqualToString(`typeof console.${property}`, "function");
    shouldBe(`console.${property}.length`, '0');
    shouldBeTrue('descriptor.configurable');
    shouldBeTrue('descriptor.writable');
    shouldBeTrue('descriptor.enumerable');
}

debug("");
shouldBe("Object.getOwnPropertyNames(console).length", "enumerablePropertyCount");

const fuzzingArguments = [
	`undefined`,
	`null`,
	`1`,
	`"test"`,
	`[]`,
	`{}`,
	`window`,
	`console`,
];

debug("");
debug("fuzzing of target for console.record");
shouldNotThrow(`console.record()`);
for (let argument of fuzzingArguments)
	shouldNotThrow(`console.record(${argument})`);

debug("");
debug("fuzzing of options for console.record");
for (let argument of fuzzingArguments)
	shouldNotThrow(`console.record({}, ${argument})`);

debug("");
debug("fuzzing of target for console.recordEnd");
shouldNotThrow(`console.recordEnd()`);
for (let argument of fuzzingArguments)
	shouldNotThrow(`console.recordEnd(${argument})`);

debug("");
debug("ensure multiple calls don't throw");
shouldNotThrow(`console.recordEnd(window.canvas)`);
shouldNotThrow(`console.recordEnd(window.canvas)`);
shouldNotThrow(`console.recordEnd(window.canvas)`);
shouldNotThrow(`console.record(window.canvas)`);
shouldNotThrow(`console.record(window.canvas)`);
shouldNotThrow(`console.record(window.canvas)`);

debug("");
debug("fuzzing of target for console.screenshot");
shouldNotThrow(`console.screenshot()`);
for (let argument of fuzzingArguments)
    shouldNotThrow(`console.screenshot(${argument})`);

debug("");

</script>
<script src="../resources/js-test-post.js"></script>
<canvas id="canvas"></canvas>
</body>
</html>