test the happy paths

.github/workflows/python-app.yml

@@ -26,14 +26,14 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install flake8 pytest
+        pip install flake8
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names
         flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
         # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
         flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
-    - name: Test with pytest
+    - name: Test with unittests
       run: |
-        pytest
+        python -m unittest test_reconciler.py

test_output.csv

@@ -0,0 +1,3 @@
+Type,Record Identifier,Field,Source Value,Target Value
+Missing in Target,1,,,
+Missing in Source,3,,,

test_reconciler.py

@@ -0,0 +1,46 @@
+import unittest
+import csv
+import os
+from reconciler import Reconciler, ReconciliationReport
+
+class TestReconciler(unittest.TestCase):
+    def setUp(self):
+        # Create sample CSV files for testing
+        self.source_csv_path =  'test_source.csv'
+        self.target_csv_path = 'test_target.csv'
+        self.output_csv_path = 'test_output.csv'
+
+        self.create_sample_csv(self.source_csv_path, [{'ID': '1', 'Name': 'John'}, {'ID': '2', 'Name': 'Alice'}])
+        self.create_sample_csv(self.target_csv_path, [{'ID': '2', 'Name': 'Alice'}, {'ID': '3', 'Name': 'Bob'}])
+
+    def tearDown(self):
+        # Remove sample CSV files after testing
+        os.remove(self.source_csv_path)
+        os.remove(self.target_csv_path)
+
+
+    def create_sample_csv(self, file_path, data):
+        with open(file_path, 'w', newline='') as file:
+            writer = csv.DictWriter(file, fieldnames=['ID', 'Name'])
+            writer.writeheader()
+            writer.writerows(data)
+
+    def test_reconciliation_with_discrepancies(self):
+        rc = Reconciler(self.source_csv_path, self.target_csv_path)
+        report = rc.reconcile_data()
+
+        self.assertIsInstance(report, ReconciliationReport)
+        self.assertTrue(report.missing_in_target)
+        self.assertTrue(report.missing_in_source)
+        self.assertTrue(report.discrepancies)
+
+
+    def test_report_generation(self):
+        rc = Reconciler(self.source_csv_path, self.target_csv_path)
+        report = rc.reconcile_data()
+        report.generate_report(self.output_csv_path)
+
+        self.assertTrue(os.path.exists(self.output_csv_path))
+
+if __name__ == '__main__':
+    unittest.main()