[Test] Add test cases for RecceConfig

Signed-off-by: Kent Huang <[email protected]>

tests/data/config/recce.yml

@@ -0,0 +1,11 @@
+# Preset Checks
+# Please see https://datarecce.io/docs/features/preset-checks/
+checks:
+- name: Row count diff
+  description: Check the row count diff for all table models.
+  type: row_count_diff
+  params:
+    select: state:modified,config.materialized:table
+- name: Schema diff
+  description: Check the schema diff for all nodes.
+  type: schema_diff

tests/test_config.py

@@ -0,0 +1,37 @@
+import os.path
+from unittest import TestCase
+from unittest.mock import patch
+
+from recce.config import RecceConfig
+from recce.util import SingletonMeta
+
+test_root_path = os.path.dirname(os.path.abspath(__file__))
+
+
+class RecceConfigTestCase(TestCase):
+    def setUp(self):
+        self.recce_config_path = os.path.join(test_root_path, 'data', 'config', 'recce.yml')
+        pass
+
+    def tearDown(self):
+        # Reset the SingletonMeta instances due to RecceConfig is a singleton
+        SingletonMeta._instances = {}
+
+    def test_load_recce_config(self):
+        config = RecceConfig(self.recce_config_path)
+
+        # Test data contains 2 checks
+        preset_checks = config.config.get('checks')
+        self.assertIsNotNone(preset_checks)
+        self.assertIsInstance(preset_checks, list)
+        self.assertEqual(len(preset_checks), 2)
+
+    @patch('recce.config.RecceConfig.save')
+    def test_recce_config_not_found(self, mock_save):
+        default_config = RecceConfig('NOT_EXISTING_FILE')
+        assert mock_save.called is True
+        # Default config should be generated
+        preset_checks = default_config.config.get('checks')
+        self.assertIsNotNone(default_config.config)
+        self.assertIsInstance(preset_checks, list)
+        self.assertEqual(len(preset_checks), 2)