describe(“toBeNaN”, function() {
it("passes for NaN with a custom .not fail", function() { var matcher = j$.matchers.toBeNaN(), result; result = matcher.compare(Number.NaN); expect(result.pass).toBe(true); expect(result.message).toEqual("Expected actual not to be NaN."); }); it("fails for anything not a NaN", function() { var matcher = j$.matchers.toBeNaN(), result; result = matcher.compare(1); expect(result.pass).toBe(false); result = matcher.compare(null); expect(result.pass).toBe(false); result = matcher.compare(void 0); expect(result.pass).toBe(false); result = matcher.compare(''); expect(result.pass).toBe(false); result = matcher.compare(Number.POSITIVE_INFINITY); expect(result.pass).toBe(false); }); it("has a custom message on failure", function() { var matcher = j$.matchers.toBeNaN(), result = matcher.compare(0); expect(result.message()).toEqual("Expected 0 to be NaN."); });
});