test(persistence): add test for list converter

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

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

@@ -0,0 +1,53 @@
+import 'dart:convert';
+
+import 'package:test/test.dart';
+import 'package:stream_chat_persistence/src/converter/list_converter.dart';
+
+void main() {
+  group('mapToDart', () {
+    final listConverter = ListConverter<String>();
+
+    test('should return null if nothing is provided', () {
+      final res = listConverter.mapToDart(null);
+      expect(res, isNull);
+    });
+
+    test('should throw type error if the provided json is not a list', () {
+      final json = {'test_key': 'testData'};
+      expect(
+        () => listConverter.mapToDart(jsonEncode(json)),
+        throwsA(isA<TypeError>()),
+      );
+    });
+
+    test('should throw type error if the provided json is not a list of String',
+        () {
+      final json = [22, 33, 44];
+      expect(
+        () => listConverter.mapToDart(jsonEncode(json)),
+        throwsA(isA<TypeError>()),
+      );
+    });
+
+    test('should return list of String if json data list is provided', () {
+      final data = ['data1', 'data2', 'data3'];
+      final res = listConverter.mapToDart(jsonEncode(data));
+      expect(res.length, data.length);
+    });
+  });
+
+  group('mapToSql', () {
+    final listConverter = ListConverter<String>();
+
+    test('should return null if nothing is provided', () {
+      final res = listConverter.mapToSql(null);
+      expect(res, isNull);
+    });
+
+    test('should return json string if data list is provided', () {
+      final data = ['data1', 'data2', 'data3'];
+      final res = listConverter.mapToSql(data);
+      expect(res, jsonEncode(data));
+    });
+  });
+}