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.");
});

});