|
| 1 | +import unittest |
| 2 | +from unittest.mock import MagicMock, patch |
| 3 | + |
| 4 | +from exceptions.id_sync_exception import IdSyncException |
| 5 | +from pds_details import get_nhs_number_from_pds_resource, pds_get_patient_details |
| 6 | + |
| 7 | + |
| 8 | +class TestGetPdsPatientDetails(unittest.TestCase): |
| 9 | + def setUp(self): |
| 10 | + """Set up test fixtures and mocks""" |
| 11 | + self.test_patient_id = "9912003888" |
| 12 | + |
| 13 | + # Patch all external dependencies |
| 14 | + self.logger_patcher = patch("pds_details.logger") |
| 15 | + self.mock_logger = self.logger_patcher.start() |
| 16 | + |
| 17 | + self.secrets_manager_patcher = patch("common.clients.global_secrets_manager_client") |
| 18 | + self.mock_secrets_manager = self.secrets_manager_patcher.start() |
| 19 | + |
| 20 | + self.pds_env_patcher = patch("pds_details.get_pds_env") |
| 21 | + self.mock_pds_env = self.pds_env_patcher.start() |
| 22 | + self.mock_pds_env.return_value = "test-env" |
| 23 | + |
| 24 | + self.auth_patcher = patch("pds_details.AppRestrictedAuth") |
| 25 | + self.mock_auth_class = self.auth_patcher.start() |
| 26 | + self.mock_auth_instance = MagicMock() |
| 27 | + self.mock_auth_class.return_value = self.mock_auth_instance |
| 28 | + |
| 29 | + self.pds_service_patcher = patch("pds_details.PdsService") |
| 30 | + self.mock_pds_service_class = self.pds_service_patcher.start() |
| 31 | + self.mock_pds_service_instance = MagicMock() |
| 32 | + self.mock_pds_service_class.return_value = self.mock_pds_service_instance |
| 33 | + |
| 34 | + def tearDown(self): |
| 35 | + """Clean up patches""" |
| 36 | + patch.stopall() |
| 37 | + |
| 38 | + def test_pds_get_patient_details_success(self): |
| 39 | + """Test successful retrieval of patient details""" |
| 40 | + # Arrange |
| 41 | + expected_patient_data = { |
| 42 | + "identifier": [{"value": "9912003888"}], |
| 43 | + "name": "John Doe", |
| 44 | + "birthDate": "1990-01-01", |
| 45 | + "gender": "male", |
| 46 | + } |
| 47 | + self.mock_pds_service_instance.get_patient_details.return_value = expected_patient_data |
| 48 | + |
| 49 | + # Act |
| 50 | + result = pds_get_patient_details(self.test_patient_id) |
| 51 | + |
| 52 | + # Assert |
| 53 | + self.assertEqual(result["identifier"][0]["value"], "9912003888") |
| 54 | + |
| 55 | + # Verify get_patient_details was called |
| 56 | + self.mock_pds_service_instance.get_patient_details.assert_called_once() |
| 57 | + |
| 58 | + def test_pds_get_patient_details_no_patient_found(self): |
| 59 | + """Test when PDS returns None (no patient found)""" |
| 60 | + # Arrange |
| 61 | + self.mock_pds_service_instance.get_patient_details.return_value = None |
| 62 | + |
| 63 | + # Act |
| 64 | + result = pds_get_patient_details(self.test_patient_id) |
| 65 | + |
| 66 | + # Assert |
| 67 | + self.assertIsNone(result) |
| 68 | + |
| 69 | + self.mock_pds_service_instance.get_patient_details.assert_called_once_with(self.test_patient_id) |
| 70 | + |
| 71 | + def test_pds_get_patient_details_empty_response(self): |
| 72 | + """Test when PDS returns empty dict (falsy)""" |
| 73 | + # Arrange |
| 74 | + self.mock_pds_service_instance.get_patient_details.return_value = None |
| 75 | + |
| 76 | + # Act |
| 77 | + result = pds_get_patient_details(self.test_patient_id) |
| 78 | + |
| 79 | + # Assert |
| 80 | + self.assertIsNone(result) |
| 81 | + |
| 82 | + def test_pds_get_patient_details_pds_service_exception(self): |
| 83 | + """Test when PdsService.get_patient_details raises an exception""" |
| 84 | + # Arrange |
| 85 | + mock_exception = Exception("My custom error") |
| 86 | + self.mock_pds_service_instance.get_patient_details.side_effect = mock_exception |
| 87 | + |
| 88 | + # Act |
| 89 | + with self.assertRaises(IdSyncException) as context: |
| 90 | + pds_get_patient_details(self.test_patient_id) |
| 91 | + |
| 92 | + exception = context.exception |
| 93 | + |
| 94 | + # Assert |
| 95 | + self.assertEqual( |
| 96 | + exception.message, |
| 97 | + "Error retrieving patient details from PDS", |
| 98 | + ) |
| 99 | + |
| 100 | + # Verify exception was logged |
| 101 | + self.mock_logger.exception.assert_called_once_with("Error retrieving patient details from PDS") |
| 102 | + |
| 103 | + self.mock_pds_service_instance.get_patient_details.assert_called_once_with(self.test_patient_id) |
| 104 | + |
| 105 | + def test_pds_get_patient_details_auth_initialization_error(self): |
| 106 | + """Test when AppRestrictedAuth initialization fails""" |
| 107 | + # Arrange |
| 108 | + self.mock_auth_class.side_effect = ValueError("Invalid authentication parameters") |
| 109 | + |
| 110 | + # Act |
| 111 | + with self.assertRaises(IdSyncException) as context: |
| 112 | + pds_get_patient_details(self.test_patient_id) |
| 113 | + |
| 114 | + # Assert |
| 115 | + exception = context.exception |
| 116 | + self.assertEqual( |
| 117 | + exception.message, |
| 118 | + "Error retrieving patient details from PDS", |
| 119 | + ) |
| 120 | + |
| 121 | + # Verify exception was logged |
| 122 | + self.mock_logger.exception.assert_called_once_with("Error retrieving patient details from PDS") |
| 123 | + |
| 124 | + def test_pds_get_patient_details_exception(self): |
| 125 | + """Test when logger.info throws an exception""" |
| 126 | + # Arrange |
| 127 | + test_exception = Exception("some-random-error") |
| 128 | + self.mock_pds_service_class.side_effect = test_exception |
| 129 | + test_nhs_number = "another-nhs-number" |
| 130 | + |
| 131 | + # Act |
| 132 | + with self.assertRaises(Exception) as context: |
| 133 | + pds_get_patient_details(test_nhs_number) |
| 134 | + |
| 135 | + exception = context.exception |
| 136 | + # Assert |
| 137 | + self.assertEqual( |
| 138 | + exception.message, |
| 139 | + "Error retrieving patient details from PDS", |
| 140 | + ) |
| 141 | + # Verify logger.exception was called due to the caught exception |
| 142 | + self.mock_logger.exception.assert_called_once_with("Error retrieving patient details from PDS") |
| 143 | + |
| 144 | + def test_pds_get_patient_details_different_patient_ids(self): |
| 145 | + """Test with different patient ID formats""" |
| 146 | + test_cases = [ |
| 147 | + ("9912003888", {"identifier": [{"value": "9912003888"}]}), |
| 148 | + ("1234567890", {"identifier": [{"value": "1234567890"}]}), |
| 149 | + ("0000000000", {"identifier": [{"value": "0000000000"}]}), |
| 150 | + ] |
| 151 | + |
| 152 | + for patient_id, expected_response in test_cases: |
| 153 | + with self.subTest(patient_id=patient_id): |
| 154 | + # Reset mocks |
| 155 | + self.mock_pds_service_instance.reset_mock() |
| 156 | + self.mock_logger.reset_mock() |
| 157 | + |
| 158 | + # Arrange |
| 159 | + self.mock_pds_service_instance.get_patient_details.return_value = expected_response |
| 160 | + |
| 161 | + # Act |
| 162 | + result = pds_get_patient_details(patient_id) |
| 163 | + |
| 164 | + # Assert |
| 165 | + self.assertEqual(result, expected_response) |
| 166 | + self.mock_pds_service_instance.get_patient_details.assert_called_once_with(patient_id) |
| 167 | + |
| 168 | + def test_pds_get_patient_details(self): |
| 169 | + """Test with complex identifier structure""" |
| 170 | + # Arrange |
| 171 | + test_nhs_number = "9912003888" |
| 172 | + pds_id = "abcefghijkl" |
| 173 | + mock_pds_response = {"identifier": [{"value": pds_id}]} |
| 174 | + self.mock_pds_service_instance.get_patient_details.return_value = mock_pds_response |
| 175 | + # Act |
| 176 | + result = pds_get_patient_details(test_nhs_number) |
| 177 | + |
| 178 | + # Assert - function should extract the value from first identifier |
| 179 | + self.assertEqual(result, mock_pds_response) |
| 180 | + self.mock_pds_service_instance.get_patient_details.assert_called_once_with(test_nhs_number) |
| 181 | + |
| 182 | + def test_get_nhs_number_from_pds_resource(self): |
| 183 | + """Test that the NHS Number is retrieved from a full PDS patient resource.""" |
| 184 | + mock_pds_resource = { |
| 185 | + "identifier": [ |
| 186 | + { |
| 187 | + "system": "https://fhir.nhs.uk/Id/nhs-number", |
| 188 | + "value": "123456789012", |
| 189 | + } |
| 190 | + ] |
| 191 | + } |
| 192 | + |
| 193 | + result = get_nhs_number_from_pds_resource(mock_pds_resource) |
| 194 | + |
| 195 | + self.assertEqual(result, "123456789012") |
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