SLSCMN-3 config service tests

jest.config.ts

@@ -138,7 +138,7 @@ export default {
   // runner: "jest-runner",
 
   // The paths to modules that run some code to configure or set up the testing environment before each test
-  // setupFiles: ['<rootDir>/jest.setup.ts'],
+  setupFiles: ['<rootDir>/jest.setup.ts'],
 
   // A list of paths to modules that run some code to configure or set up the testing framework before each test
   // setupFilesAfterEnv: [],

jest.setup.ts

@@ -0,0 +1,6 @@
+// declare env vars
+process.env.AWS_EXECUTION_ENV = 'aws-execution-env';
+process.env.AWS_LAMBDA_FUNCTION_MEMORY_SIZE = '128';
+process.env.AWS_LAMBDA_FUNCTION_NAME = 'aws-lambda-function-name';
+process.env.AWS_LAMBDA_FUNCTION_VERSION = 'aws-lambda-function-version';
+process.env.AWS_REGION = 'aws-region';

src/services/__tests__/config.service-failure.test.ts

@@ -0,0 +1,20 @@
+import { ServiceError } from '../../errors/service.error';
+import { LambdaConfig, lambdaConfigSchema, validateConfig } from '../config.service';
+
+describe('ConfigService Failure', () => {
+  const originalEnv = process.env;
+
+  beforeEach(() => {
+    jest.resetModules();
+    process.env = { ...originalEnv };
+    delete process.env.AWS_REGION;
+  });
+
+  afterEach(() => {
+    process.env = originalEnv;
+  });
+
+  it('should throw error when validation fails', () => {
+    expect(() => validateConfig<LambdaConfig>(lambdaConfigSchema)).toThrow(ServiceError);
+  });
+});

src/services/__tests__/config.service.test.ts

@@ -0,0 +1,20 @@
+import { LambdaConfig, lambdaConfigSchema, validateConfig } from '../config.service';
+
+describe('ConfigService', () => {
+  it('should validate successfully', () => {
+    const validatedConfig = validateConfig<LambdaConfig>(lambdaConfigSchema);
+
+    expect(validatedConfig).toBeDefined();
+  });
+
+  it('should return LambdaConfig attributes', () => {
+    const validatedConfig = validateConfig<LambdaConfig>(lambdaConfigSchema);
+
+    expect(validatedConfig).toBeDefined();
+    expect(validatedConfig.AWS_EXECUTION_ENV).toBe('aws-execution-env');
+    expect(validatedConfig.AWS_LAMBDA_FUNCTION_MEMORY_SIZE).toBe('128');
+    expect(validatedConfig.AWS_LAMBDA_FUNCTION_NAME).toBe('aws-lambda-function-name');
+    expect(validatedConfig.AWS_LAMBDA_FUNCTION_VERSION).toBe('aws-lambda-function-version');
+    expect(validatedConfig.AWS_REGION).toBe('aws-region');
+  });
+});