[FSSDK-11238] json_schema_validator test addition

Author: junaed-optimizely

lib/utils/json_schema_validator/index.spec.ts

@@ -0,0 +1,49 @@
+/**
+ * Copyright 2025, Optimizely
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import { describe, it, expect } from 'vitest';
+import { validate } from '.';
+import testData from '../../tests/test_data';
+import { NO_JSON_PROVIDED, INVALID_DATAFILE } from 'error_message';
+
+describe('validate', () => {
+  it('should throw an error if the object is not valid', () => {
+    expect(() => validate({})).toThrow();
+
+    try {
+      validate({});
+    } catch (err) {
+      expect(err.baseMessage).toBe(INVALID_DATAFILE);
+    }
+  });
+
+  it('should throw an error if no json object is passed in', () => {
+    // eslint-disable-next-line @typescript-eslint/ban-ts-comment
+    // @ts-ignore
+    expect(() => validate()).toThrow();
+
+    try {
+      // eslint-disable-next-line @typescript-eslint/ban-ts-comment
+      // @ts-ignore
+      validate();
+    } catch (err) {
+      expect(err.baseMessage).toBe(NO_JSON_PROVIDED);
+    }
+  });
+
+  it('should validate specified Optimizely datafile', () => {
+		expect(validate(testData.getTestProjectConfig())).toBe(true);
+  });
+});