describe('toHaveBeenCalledBefore', function() {
  it('throws an exception when the actual is not a spy', function() {
    const matcher = privateUnderTest.matchers.toHaveBeenCalledBefore({
      pp: privateUnderTest.makePrettyPrinter()
    });
    const fn = function() {};
    const spy = new privateUnderTest.Env().createSpy('a spy');

    expect(function() {
      matcher.compare(fn, spy);
    }).toThrowError(Error, /Expected a spy, but got Function./);
  });

  it('throws an exception when the expected is not a spy', function() {
    const matcher = privateUnderTest.matchers.toHaveBeenCalledBefore({
      pp: privateUnderTest.makePrettyPrinter()
    });
    const spy = new privateUnderTest.Env().createSpy('a spy');
    const fn = function() {};

    expect(function() {
      matcher.compare(spy, fn);
    }).toThrowError(Error, /Expected a spy, but got Function./);
  });

  it('fails when the actual was not called', function() {
    const matcher = privateUnderTest.matchers.toHaveBeenCalledBefore();
    const firstSpy = new privateUnderTest.Spy('first spy');
    const secondSpy = new privateUnderTest.Spy('second spy');

    secondSpy();

    const result = matcher.compare(firstSpy, secondSpy);
    expect(result.pass).toBe(false);
    expect(result.message).toMatch(
      /Expected spy first spy to have been called./
    );
  });

  it('fails when the expected was not called', function() {
    const matcher = privateUnderTest.matchers.toHaveBeenCalledBefore();
    const firstSpy = new privateUnderTest.Spy('first spy');
    const secondSpy = new privateUnderTest.Spy('second spy');

    firstSpy();

    const result = matcher.compare(firstSpy, secondSpy);
    expect(result.pass).toBe(false);
    expect(result.message).toMatch(
      /Expected spy second spy to have been called./
    );
  });

  it('fails when the actual is called after the expected', function() {
    const matcher = privateUnderTest.matchers.toHaveBeenCalledBefore();
    const firstSpy = new privateUnderTest.Spy('first spy');
    const secondSpy = new privateUnderTest.Spy('second spy');

    secondSpy();
    firstSpy();

    const result = matcher.compare(firstSpy, secondSpy);
    expect(result.pass).toBe(false);
    expect(result.message).toEqual(
      'Expected spy first spy to have been called before spy second spy'
    );
  });

  it('fails when the actual is called before and after the expected', function() {
    const matcher = privateUnderTest.matchers.toHaveBeenCalledBefore();
    const firstSpy = new privateUnderTest.Spy('first spy');
    const secondSpy = new privateUnderTest.Spy('second spy');

    firstSpy();
    secondSpy();
    firstSpy();

    const result = matcher.compare(firstSpy, secondSpy);
    expect(result.pass).toBe(false);
    expect(result.message).toEqual(
      'Expected latest call to spy first spy to have been called before first call to spy second spy (no interleaved calls)'
    );
  });

  it('fails when the expected is called before and after the actual', function() {
    const matcher = privateUnderTest.matchers.toHaveBeenCalledBefore();
    const firstSpy = new privateUnderTest.Spy('first spy');
    const secondSpy = new privateUnderTest.Spy('second spy');

    secondSpy();
    firstSpy();
    secondSpy();

    const result = matcher.compare(firstSpy, secondSpy);
    expect(result.pass).toBe(false);
    expect(result.message).toEqual(
      'Expected first call to spy second spy to have been called after latest call to spy first spy (no interleaved calls)'
    );
  });

  it('passes when the actual is called before the expected', function() {
    const matcher = privateUnderTest.matchers.toHaveBeenCalledBefore();
    const firstSpy = new privateUnderTest.Spy('first spy');
    const secondSpy = new privateUnderTest.Spy('second spy');

    firstSpy();
    secondSpy();

    const result = matcher.compare(firstSpy, secondSpy);
    expect(result.pass).toBe(true);
    expect(result.message).toEqual(
      'Expected spy first spy to not have been called before spy second spy, but it was'
    );
  });

  it('set the correct calls as verified when passing', function() {
    const matcher = privateUnderTest.matchers.toHaveBeenCalledBefore();
    const firstSpy = new privateUnderTest.Spy('first spy');
    const secondSpy = new privateUnderTest.Spy('second spy');

    firstSpy();
    secondSpy();

    matcher.compare(firstSpy, secondSpy);

    expect(firstSpy.calls.count()).toBe(1);
    expect(firstSpy.calls.unverifiedCount()).toBe(0);
    expect(secondSpy.calls.count()).toBe(1);
    expect(secondSpy.calls.unverifiedCount()).toBe(0);
  });
});