[FSSDK-10616] logger improvement

Author: junaed-optimizely

src/logger.spec.ts

@@ -0,0 +1,78 @@
+/**
+ * Copyright 2024 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 * as optimizely from '@optimizely/optimizely-sdk';
+import { logger } from './logger';
+import { sprintf } from './utils';
+
+jest.mock('@optimizely/optimizely-sdk', () => ({
+  getLogger: jest.fn().mockReturnValue({
+    log: jest.fn(),
+  }),
+  enums: {
+    LOG_LEVEL: {
+      WARNING: 'WARNING',
+      INFO: 'INFO',
+      DEBUG: 'DEBUG',
+      ERROR: 'ERROR',
+    },
+  },
+}));
+
+describe('logger module', () => {
+  const mockLogHandler = optimizely.getLogger('ReactSDK');
+  const logSpy = mockLogHandler.log as jest.Mock;
+
+  beforeEach(() => {
+    jest.clearAllMocks();
+  });
+
+  it('should log a warning message', () => {
+    const message = 'This is a warning: %s';
+    const arg = 'something went wrong';
+
+    logger.warn(message, arg);
+
+    expect(logSpy).toHaveBeenCalledWith(optimizely.enums.LOG_LEVEL.WARNING, sprintf(message, arg));
+  });
+
+  it('should log an info message', () => {
+    const message = 'This is an info: %s';
+    const arg = 'all good';
+
+    logger.info(message, arg);
+
+    expect(logSpy).toHaveBeenCalledWith(optimizely.enums.LOG_LEVEL.INFO, sprintf(message, arg));
+  });
+
+  it('should log a debug message', () => {
+    const message = 'Debugging: %s';
+    const arg = 'checking details';
+
+    logger.debug(message, arg);
+
+    expect(logSpy).toHaveBeenCalledWith(optimizely.enums.LOG_LEVEL.DEBUG, sprintf(message, arg));
+  });
+
+  it('should log an error message', () => {
+    const message = 'Error occurred: %s';
+    const arg = 'critical failure';
+
+    logger.error(message, arg);
+
+    expect(logSpy).toHaveBeenCalledWith(optimizely.enums.LOG_LEVEL.ERROR, sprintf(message, arg));
+  });
+});

src/logger.tsx

@@ -1,5 +1,5 @@
 /**
- * Copyright 2022, Optimizely
+ * Copyright 2022,2024 Optimizely
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.