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Qliu2/new test #98

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0f7ac27
BUGFIX: Implement 3-arg subtraction
Feb 7, 2023
c053581
add sub function
Feb 7, 2023
1625e5c
add missing test
Feb 7, 2023
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4 changes: 4 additions & 0 deletions src/calc.py
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Original file line number Diff line number Diff line change
Expand Up @@ -18,3 +18,7 @@ def sub(a, b):
```
"""
return a - b

def sub(a, b, c = 0):
return a - b - c

6 changes: 6 additions & 0 deletions src/calc_test.py
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Expand Up @@ -17,6 +17,12 @@ def test_sub_2arg(self):
# Make sure 4 - 3 = 1
self.assertEqual(sub(4, 3), 1, 'subtracting three from four')

def test sub_3arg(self):
self.assertEqual(sub(4, 3, 1), 0, 'subtractingthree and one from four')

def test sub_3arg_zeros(self):
self.assertEqual(sub(0, 0, 0), 0, 'zero minus zero minus zero is zero'):


if __name__ == '__main__':
unittest.main()