describe('toHaveClass', function() {
  it('fails for a DOM element that lacks the expected class', function() {
    const matcher = privateUnderTest.matchers.toHaveClass();
    const result = matcher.compare(
      specHelpers.domHelpers.createElementWithClassName(''),
      'foo'
    );

    expect(result.pass).toBe(false);
  });

  it('passes for a DOM element that has the expected class', function() {
    const matcher = privateUnderTest.matchers.toHaveClass();
    const el = specHelpers.domHelpers.createElementWithClassName('foo bar baz');

    expect(matcher.compare(el, 'foo').pass).toBe(true);
    expect(matcher.compare(el, 'bar').pass).toBe(true);
    expect(matcher.compare(el, 'bar').pass).toBe(true);
  });

  it('fails for a DOM element that only has other classes', function() {
    const matcher = privateUnderTest.matchers.toHaveClass();
    const el = specHelpers.domHelpers.createElementWithClassName('foo bar');

    expect(matcher.compare(el, 'fo').pass).toBe(false);
  });

  it('throws an exception when actual is not a DOM element', function() {
    const matcher = privateUnderTest.matchers.toHaveClass({
      pp: privateUnderTest.makePrettyPrinter()
    });

    expect(function() {
      matcher.compare('x', 'foo');
    }).toThrowError("'x' is not a DOM element");

    expect(function() {
      matcher.compare(undefined, 'foo');
    }).toThrowError('undefined is not a DOM element');

    const textNode = specHelpers.domHelpers.document.createTextNode('');
    expect(function() {
      matcher.compare(textNode, 'foo');
    }).toThrowError('HTMLNode is not a DOM element');

    expect(function() {
      matcher.compare({ classList: '' }, 'foo');
    }).toThrowError("Object({ classList: '' }) is not a DOM element");
  });
});