added tests

test-projects/python-basic/tests/test_calculator.py

@@ -0,0 +1,47 @@
+"""Tests for the calculator module."""
+
+import pytest
+from test_package.calculator import Calculator
+
+
+class TestCalculator:
+    """Test cases for Calculator class."""
+    
+    def setup_method(self):
+        """Set up test fixtures."""
+        self.calc = Calculator()
+    
+    def test_add(self):
+        """Test addition operation."""
+        assert self.calc.add(2, 3) == 5
+        assert self.calc.add(-1, 1) == 0
+        assert self.calc.add(0.1, 0.2) == pytest.approx(0.3)
+    
+    def test_subtract(self):
+        """Test subtraction operation."""
+        assert self.calc.subtract(5, 3) == 2
+        assert self.calc.subtract(1, 1) == 0
+        assert self.calc.subtract(-1, -2) == 1
+    
+    def test_multiply(self):
+        """Test multiplication operation."""
+        assert self.calc.multiply(3, 4) == 12
+        assert self.calc.multiply(-2, 3) == -6
+        assert self.calc.multiply(0, 100) == 0
+    
+    def test_divide(self):
+        """Test division operation."""
+        assert self.calc.divide(10, 2) == 5.0
+        assert self.calc.divide(7, 2) == 3.5
+        assert self.calc.divide(-6, 3) == -2.0
+    
+    def test_divide_by_zero(self):
+        """Test division by zero raises error."""
+        with pytest.raises(ValueError, match="Cannot divide by zero"):
+            self.calc.divide(5, 0)
+    
+    def test_power(self):
+        """Test power operation."""
+        assert self.calc.power(2, 3) == 8
+        assert self.calc.power(5, 0) == 1
+        assert self.calc.power(2, -1) == 0.5