Merge pull request #3 from dana-yaish/test

Test

Author: dana-yaish

app/test_calculator.py

@@ -29,3 +29,5 @@ def test_divide():
  assert Calculator.divide(0, 2.0) == 0
  assert Calculator.divide(-4, 2.0) == -2.0
  # assert Calculator.divide(2.0, 0.0) == 'Cannot divide by 0'
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