From de3a611b70b8439bbfb8ada6944b87475dd5f08e Mon Sep 17 00:00:00 2001
From: "Hiroshi (Wes) Nishio" <hnishio0105@gmail.com>
Date: Fri, 20 Mar 2026 07:56:58 -0700
Subject: [PATCH 1/4] Initial empty commit to create PR [skip ci]


From dc15f54a3bd71398f4cdf2e236790af9406ef99d Mon Sep 17 00:00:00 2001
From: "gitauto-ai[bot]" <161652217+gitauto-ai[bot]@users.noreply.github.com>
Date: Fri, 20 Mar 2026 14:58:16 +0000
Subject: [PATCH 2/4] Create test_calculator.py [skip ci]

Co-Authored-By: Hiroshi (Wes) Nishio <hnishio0105@gmail.com>
---
 test_calculator.py | 109 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 109 insertions(+)
 create mode 100644 test_calculator.py

diff --git a/test_calculator.py b/test_calculator.py
new file mode 100644
index 0000000..5b996a7
--- /dev/null
+++ b/test_calculator.py
@@ -0,0 +1,109 @@
+from unittest.mock import patch
+
+from calculator import add, divide, main, multiply, subtract
+
+import pytest
+
+
+class TestAdd:
+    def test_positive_numbers(self):
+        assert add(2, 3) == 5
+
+    def test_negative_numbers(self):
+        assert add(-1, -2) == -3
+
+    def test_mixed_signs(self):
+        assert add(-1, 3) == 2
+
+    def test_zeros(self):
+        assert add(0, 0) == 0
+
+    def test_floats(self):
+        assert add(1.5, 2.5) == 4.0
+
+
+class TestSubtract:
+    def test_positive_numbers(self):
+        assert subtract(5, 3) == 2
+
+    def test_negative_result(self):
+        assert subtract(3, 5) == -2
+
+    def test_zeros(self):
+        assert subtract(0, 0) == 0
+
+    def test_floats(self):
+        assert subtract(5.5, 2.5) == 3.0
+
+
+class TestMultiply:
+    def test_positive_numbers(self):
+        assert multiply(3, 4) == 12
+
+    def test_by_zero(self):
+        assert multiply(5, 0) == 0
+
+    def test_negative_numbers(self):
+        assert multiply(-2, -3) == 6
+
+    def test_mixed_signs(self):
+        assert multiply(-2, 3) == -6
+
+    def test_floats(self):
+        assert multiply(2.5, 4) == 10.0
+
+
+class TestDivide:
+    def test_even_division(self):
+        assert divide(10, 2) == 5.0
+
+    def test_fractional_result(self):
+        assert divide(7, 2) == 3.5
+
+    def test_divide_by_zero(self):
+        with pytest.raises(ValueError, match="Cannot divide by zero"):
+            divide(10, 0)
+
+    def test_negative_divisor(self):
+        assert divide(10, -2) == -5.0
+
+    def test_zero_numerator(self):
+        assert divide(0, 5) == 0.0
+
+
+class TestMain:
+    @patch("builtins.print")
+    @patch("builtins.input", side_effect=["5", "+", "3"])
+    def test_addition_operation(self, _mock_input, mock_print):
+        main()
+        mock_print.assert_any_call("5.0 + 3.0 = 8.0")
+
+    @patch("builtins.print")
+    @patch("builtins.input", side_effect=["10", "-", "4"])
+    def test_subtraction_operation(self, _mock_input, mock_print):
+        main()
+        mock_print.assert_any_call("10.0 - 4.0 = 6.0")
+
+    @patch("builtins.print")
+    @patch("builtins.input", side_effect=["3", "*", "7"])
+    def test_multiplication_operation(self, _mock_input, mock_print):
+        main()
+        mock_print.assert_any_call("3.0 * 7.0 = 21.0")
+
+    @patch("builtins.print")
+    @patch("builtins.input", side_effect=["20", "/", "4"])
+    def test_division_operation(self, _mock_input, mock_print):
+        main()
+        mock_print.assert_any_call("20.0 / 4.0 = 5.0")
+
+    @patch("builtins.print")
+    @patch("builtins.input", side_effect=["5", "%", "3"])
+    def test_unknown_operation(self, _mock_input, mock_print):
+        main()
+        mock_print.assert_any_call("Unknown operation: %")
+
+    @patch("builtins.print")
+    @patch("builtins.input", side_effect=["10", "/", "0"])
+    def test_divide_by_zero_in_main(self, _mock_input, _mock_print):
+        with pytest.raises(ValueError, match="Cannot divide by zero"):
+            main()

From f390f1a4092a98b5b622e656b4a899fc2f3e8e4f Mon Sep 17 00:00:00 2001
From: "gitauto-ai[bot]" <161652217+gitauto-ai[bot]@users.noreply.github.com>
Date: Fri, 20 Mar 2026 15:00:12 +0000
Subject: [PATCH 3/4] Disable unnecessary lint rules for test_calculator.py
 [skip ci]

Co-Authored-By: Hiroshi (Wes) Nishio <hnishio0105@gmail.com>
---
 test_calculator.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/test_calculator.py b/test_calculator.py
index 5b996a7..05602bc 100644
--- a/test_calculator.py
+++ b/test_calculator.py
@@ -1,3 +1,4 @@
+# pylint: disable=redefined-outer-name, unused-argument
 from unittest.mock import patch
 
 from calculator import add, divide, main, multiply, subtract

From d396716ccad3fac194f054eb9fa36198d2e2d913 Mon Sep 17 00:00:00 2001
From: "gitauto-ai[bot]" <161652217+gitauto-ai[bot]@users.noreply.github.com>
Date: Fri, 20 Mar 2026 15:00:13 +0000
Subject: [PATCH 4/4] Empty commit to trigger final tests