describe("toBePositiveInfinity", function() {
  it("fails for anything that isn't Infinity", function() {
    var matcher = jasmineUnderTest.matchers.toBePositiveInfinity(),
      result;

    result = matcher.compare(1);
    expect(result.pass).toBe(false);

    result = matcher.compare(Number.NaN);
    expect(result.pass).toBe(false);

    result = matcher.compare(null);
    expect(result.pass).toBe(false);
  });

  it("has a custom message on failure", function() {
    var matcher = jasmineUnderTest.matchers.toBePositiveInfinity(),
      result = matcher.compare(0);

    expect(result.message()).toEqual("Expected 0 not to be Infinity.")
  });

  it("succeeds for Infinity", function() {
    var matcher = jasmineUnderTest.matchers.toBePositiveInfinity(),
      result = matcher.compare(Number.POSITIVE_INFINITY);

    expect(result.pass).toBe(true);
    expect(result.message).toEqual("Expected actual to be Infinity.")
  });

});