text: // https://en.wikipedia.org/wiki/Triad_(music)
  
  import isTriad from './';
  
  describe('isTriad', () => {
    it('should return true on Major Triad', () => {
      const chord = ['C', 'E', 'G'];
      expect(isTriad(chord)).toBe(true);
    });
  
    it('should return true on Major Triad', () => {
      const chord = ['F', 'A', 'C'];
      expect(isTriad(chord)).toBe(true);
    });
  
    it('should return true on Major Triad', () => {
      const chord = ['F2', 'A2', 'C3'];
      expect(isTriad(chord)).toBe(true);
    });
  
    it('should return true on Major Triad', () => {
      const chord = ['C2', 'E2', 'G2'];
      expect(isTriad(chord)).toBe(true);
    });
  
    it('should return true on Minor Triad', () => {
      const chord = ['C', 'Eb', 'G'];
      expect(isTriad(chord)).toBe(true);
    });
  
    it('should return true on Diminished Triad', () => {
      const chord = ['C', 'D#', 'F#'];
      expect(isTriad(chord)).toBe(true);
    });
  
    it('should return true on Augmented Triad', () => {
      const chord = ['C', 'E', 'G#'];
      expect(isTriad(chord)).toBe(true);
    });
  
    it('should return false when input is not a triad', () => {
      const chord = [0, 3, 8];
      expect(isTriad(chord)).toBe(false);
    });
  
    it('should return false when input is not a triad', () => {
      const chord = [0, 3, 7, 3];
      expect(isTriad(chord)).toBe(false);
    });
  });
  