Function mirrorPropAsAssertion

spec/sinon.js:4101–4126

(name, method, message)

    }

    function mirrorPropAsAssertion(name, method, message) {
        if (arguments.length == 2) {
            message = method;
            method = name;
        }

        assert[name] = function (fake) {
            verifyIsStub(fake);

            var args = slice.call(arguments, 1);
            var failed = false;

            if (typeof method == "function") {
                failed = !method(fake);
            } else {
                failed = typeof fake[method] == "function" ?
                    !fake[method].apply(fake, args) : !fake[method];
            }

            if (failed) {
                failAssertion(this, fake.printf.apply(fake, [message].concat(args)));
            } else {
                assert.pass(name);
            }
        };
    }

    function exposedName(prefix, prop) {
        return !prefix || /^fail/.test(prop) ? prop :