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| 1 | +const { |
| 2 | + add, |
| 3 | + subtract, |
| 4 | + multiply, |
| 5 | + divide, |
| 6 | +} = require('./calculator'); |
| 7 | + |
| 8 | +test('add function', () => { |
| 9 | + expect(add(1, 2)).toBe(3); |
| 10 | + expect(add(1.0, 2.0)).toBe(3.0); |
| 11 | + expect(add(0, 2.0)).toBe(2.0); |
| 12 | + expect(add(2.0, 0)).toBe(2.0); |
| 13 | + expect(add(-4, 2.0)).toBe(-2.0); |
| 14 | +}); |
| 15 | + |
| 16 | +test('subtract function', () => { |
| 17 | + expect(subtract(1, 2)).toBe(-1.0); |
| 18 | + expect(subtract(2, 1)).toBe(1.0); |
| 19 | + expect(subtract(1.0, 2.0)).toBe(-1.0); |
| 20 | + expect(subtract(0, 2.0)).toBe(-2.0); |
| 21 | + expect(subtract(2.0, 0)).toBe(2.0); |
| 22 | + expect(subtract(-4, 2.0)).toBe(-6.0); |
| 23 | +}); |
| 24 | + |
| 25 | +test('multiply function', () => { |
| 26 | + expect(multiply(1, 2)).toBe(2.0); |
| 27 | + expect(multiply(1.0, 2.0)).toBe(2.0); |
| 28 | + expect(multiply(0, 2.0)).toBe(0.0); |
| 29 | + expect(multiply(2.0, 0)).toBe(0.0); |
| 30 | + expect(multiply(-4, 2.0)).toBe(-8.0); |
| 31 | +}); |
| 32 | + |
| 33 | +test('divide function', () => { |
| 34 | + expect(divide(1, 2)).toBe(0.5); |
| 35 | + expect(divide(1.0, 2.0)).toBe(0.5); |
| 36 | + expect(divide(0, 2.0)).toBe(0); |
| 37 | + expect(divide(-4, 2.0)).toBe(-2.0); |
| 38 | + // expect(divide(2.0, 0)).toBe('Cannot divide by 0'); |
| 39 | +}); |
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