test: add tests for DataSchemaValue

Author: JKRhb

test/scripting_api/data_schema_value_test.dart

@@ -0,0 +1,19 @@
+// Copyright 2023 Contributors to the Eclipse Foundation. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+//
+// SPDX-License-Identifier: BSD-3-Clause
+
+import 'package:dart_wot/scripting_api.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group('DataSchemaValue', () {
+    test('should use the wrapped value for toString()', () {
+      const inputValue = 42;
+      final dataSchemaValue = DataSchemaValue.fromNumber(inputValue);
+
+      expect(dataSchemaValue.toString() == inputValue.toString(), isTrue);
+    });
+  });
+}