describe('perf()', () => {
  describe('Trace', () => {
    it('start() & stop()', async () => {
      const trace = firebase.perf().newTrace('bar');
      await trace.start();
      await trace.stop();
    });

    it('getAttribute() should return null', async () => {
      const trace = firebase.perf().newTrace('bar');
      await trace.start();
      const value = await trace.getAttribute('foo');
      should.equal(value, null);
      await trace.stop();
    });

    it('getAttribute() should return string value', async () => {
      const trace = firebase.perf().newTrace('bar');
      await trace.start();
      await trace.putAttribute('foo', 'bar');
      const value = await trace.getAttribute('foo');
      should.equal(value, 'bar');
      await trace.stop();
    });

    it('putAttribute()', async () => {
      const trace = firebase.perf().newTrace('bar');
      await trace.start();
      await trace.putAttribute('foo', 'bar');
      const value = await trace.getAttribute('foo');
      value.should.equal('bar');
      await trace.stop();
    });

    it('getAttributes()', async () => {
      const trace = firebase.perf().newTrace('bar');
      await trace.start();
      await trace.putAttribute('foo', 'bar');
      await trace.putAttribute('bar', 'baz');
      const value = await trace.getAttributes();
      value.should.deepEqual({
        foo: 'bar',
        bar: 'baz',
      });
      await trace.stop();
    });

    it('removeAttribute()', async () => {
      const trace = firebase.perf().newTrace('bar');
      await trace.start();
      await trace.putAttribute('foobar', 'bar');
      const value = await trace.getAttribute('foobar');
      value.should.equal('bar');
      await trace.removeAttribute('foobar');
      const removed = await trace.getAttribute('foobar');
      should.equal(removed, null);
      await trace.stop();
    });

    it('getMetric()', async () => {
      const trace = firebase.perf().newTrace('bar');
      await trace.start();
      const metric = await trace.getMetric('foo');
      metric.should.equal(0);
      await trace.stop();
    });

    it('putMetric()', async () => {
      const trace = firebase.perf().newTrace('bar');
      await trace.start();
      await trace.putMetric('baz', 1);
      const metric = await trace.getMetric('baz');
      metric.should.equal(1);
      await trace.stop();
    });

    it('incrementMetric()', async () => {
      const trace = firebase.perf().newTrace('bar');
      await trace.start();
      await trace.putMetric('baz', 1);
      await trace.incrementMetric('baz', 2);
      const metric = await trace.getMetric('baz');
      metric.should.equal(3);
      await trace.stop();
    });

  });
});