test(persistence): add test for map converter

Signed-off-by: Sahil Kumar <[email protected]>

packages/stream_chat_persistence/test/src/converter/map_converter_test.dart

@@ -0,0 +1,64 @@
+import 'dart:convert';
+
+import 'package:test/test.dart';
+import 'package:stream_chat_persistence/src/converter/map_converter.dart';
+
+void main() {
+  group('mapToDart', () {
+    final mapConverter = MapConverter<String>();
+
+    test('should return null if nothing is provided', () {
+      final res = mapConverter.mapToDart(null);
+      expect(res, isNull);
+    });
+
+    test('should throw type error if the provided json is not a map', () {
+      const json = ['testData1', 'testData2', 'testData3'];
+      expect(
+        () => mapConverter.mapToDart(jsonEncode(json)),
+        throwsA(isA<TypeError>()),
+      );
+    });
+
+    test(
+      'should throw type error if the provided json is not a '
+      'map of String, String',
+      () {
+        const json = {'test_key': 22, 'test_key2': 33, 'test_key3': 44};
+        expect(
+          () => mapConverter.mapToDart(jsonEncode(json)),
+          throwsA(isA<TypeError>()),
+        );
+      },
+    );
+
+    test('should return map of String, String if json data is provided', () {
+      const data = {
+        'test_key': 'testValue',
+        'test_key2': 'testValue2',
+        'test_key3': 'testValue3',
+      };
+      final res = mapConverter.mapToDart(jsonEncode(data));
+      expect(res, data);
+    });
+  });
+
+  group('mapToSql', () {
+    final mapConverter = MapConverter<String>();
+
+    test('should return null if nothing is provided', () {
+      final res = mapConverter.mapToSql(null);
+      expect(res, isNull);
+    });
+
+    test('should return json string if data map is provided', () {
+      const data = {
+        'test_key': 'testValue',
+        'test_key2': 'testValue2',
+        'test_key3': 'testValue3',
+      };
+      final res = mapConverter.mapToSql(data);
+      expect(res, jsonEncode(data));
+    });
+  });
+}