chore: standardized env setup for tests (#1255)

Author: dreamorosi

packages/commons/jest.config.js

@@ -1,4 +1,8 @@
 module.exports = {
+  displayName: {
+    name: 'AWS Lambda Powertools utility: COMMONS',
+    color: 'red',
+  },
   'preset': 'ts-jest',
   'transform': {
     '^.+\\.ts?$': 'ts-jest',

packages/idempotency/jest.config.js

@@ -1,7 +1,7 @@
 module.exports = {
   displayName: {
     name: 'AWS Lambda Powertools utility: IDEMPOTENCY',
-    color: 'blue',
+    color: 'yellow',
   },
   'runner': 'groups',
   'preset': 'ts-jest',

packages/idempotency/tests/helpers/populateEnvironmentVariables.ts

@@ -3,5 +3,7 @@ process.env._X_AMZN_TRACE_ID = '1-abcdef12-3456abcdef123456abcdef12';
 process.env.AWS_LAMBDA_FUNCTION_NAME = 'my-lambda-function';
 process.env.AWS_EXECUTION_ENV = 'nodejs16.x';
 process.env.AWS_LAMBDA_FUNCTION_MEMORY_SIZE = '128';
-process.env.AWS_REGION = 'eu-west-1';
+if (process.env.AWS_REGION === undefined && process.env.CDK_DEFAULT_REGION === undefined) {
+  process.env.AWS_REGION = 'eu-west-1';
+}
 process.env._HANDLER = 'index.handler';

packages/logger/tests/helpers/populateEnvironmentVariables.ts

@@ -2,7 +2,9 @@
 process.env._X_AMZN_TRACE_ID = 'Root=1-5759e988-bd862e3fe1be46a994272793;Parent=557abcec3ee5a047;Sampled=1';
 process.env.AWS_LAMBDA_FUNCTION_NAME = 'my-lambda-function';
 process.env.AWS_LAMBDA_FUNCTION_MEMORY_SIZE = '128';
-process.env.AWS_REGION = 'eu-west-1';
+if (process.env.AWS_REGION === undefined && process.env.CDK_DEFAULT_REGION === undefined) {
+  process.env.AWS_REGION = 'eu-west-1';
+}
 
 // Powertools variables
 process.env.LOG_LEVEL = 'DEBUG';

packages/metrics/jest.config.js

@@ -1,4 +1,8 @@
 module.exports = {
+  displayName: {
+    name: 'AWS Lambda Powertools utility: METRICS',
+    color: 'green',
+  },
   'runner': 'groups',
   'preset': 'ts-jest',
   'transform': {
@@ -33,4 +37,7 @@ module.exports = {
     'json-summary',
     'text',
     'lcov' ],
+  'setupFiles': [
+    '<rootDir>/tests/helpers/populateEnvironmentVariables.ts'
+  ]
 };

packages/metrics/tests/helpers/populate-environment-variables.ts

@@ -0,0 +1,10 @@
+// Reserved variables
+process.env._X_AMZN_TRACE_ID = 'Root=1-5759e988-bd862e3fe1be46a994272793;Parent=557abcec3ee5a047;Sampled=1';
+process.env.AWS_LAMBDA_FUNCTION_NAME = 'my-lambda-function';
+process.env.AWS_LAMBDA_FUNCTION_MEMORY_SIZE = '128';
+if (process.env.AWS_REGION === undefined && process.env.CDK_DEFAULT_REGION === undefined) {
+  process.env.AWS_REGION = 'eu-west-1';
+}
+
+// Powertools variables
+process.env.POWERTOOLS_METRICS_NAMESPACE = 'hello-world';

packages/metrics/tests/helpers/populateEnvironmentVariables.ts

@@ -7,7 +7,6 @@
 import { ContextExamples as dummyContext, Events as dummyEvent, LambdaInterface } from '@aws-lambda-powertools/commons';
 import { Context, Callback } from 'aws-lambda';
 import { Metrics, MetricUnits } from '../../src/';
-import { populateEnvironmentVariables } from '../helpers';
 
 const MAX_METRICS_SIZE = 100;
 const MAX_DIMENSION_COUNT = 29;
@@ -20,7 +19,7 @@ interface LooseObject {
 }
 
 describe('Class: Metrics', () => {
-  const originalEnvironmentVariables = process.env;
+  const ENVIRONMENT_VARIABLES = process.env;
   const context = dummyContext.helloworldContext;
   const event = dummyEvent.Custom.CustomEvent;
 
@@ -29,12 +28,7 @@ describe('Class: Metrics', () => {
   });
 
   beforeAll(() => {
-    populateEnvironmentVariables();
-  });
-
-  afterEach(() => {
-    process.env = originalEnvironmentVariables;
-    delete process.env.POWERTOOLS_SERVICE_NAME;
+    process.env = { ...ENVIRONMENT_VARIABLES };
   });
 
   describe('Feature: Dimensions logging', () => {

packages/metrics/tests/unit/Metrics.test.ts

@@ -2,8 +2,6 @@
 process.env._X_AMZN_TRACE_ID = 'Root=1-5759e988-bd862e3fe1be46a994272793;Parent=557abcec3ee5a047;Sampled=1';
 process.env.AWS_LAMBDA_FUNCTION_NAME = 'my-lambda-function';
 process.env.AWS_LAMBDA_FUNCTION_MEMORY_SIZE = '128';
-process.env.AWS_REGION = 'eu-west-1';
-
-// Powertools variables
-process.env.LOG_LEVEL = 'DEBUG';
-process.env.POWERTOOLS_SERVICE_NAME = 'hello-world';
+if (process.env.AWS_REGION === undefined && process.env.CDK_DEFAULT_REGION === undefined) {
+  process.env.AWS_REGION = 'eu-west-1';
+}

packages/parameters/tests/helpers/populateEnvironmentVariables.ts

@@ -1,7 +1,7 @@
 module.exports = {
   displayName: {
     name: 'AWS Lambda Powertools utility: TRACER',
-    color: 'cyan',
+    color: 'white',
   },
   'runner': 'groups',
   'preset': 'ts-jest',

packages/tracer/jest.config.js

@@ -3,7 +3,9 @@ process.env._X_AMZN_TRACE_ID = '1-abcdef12-3456abcdef123456abcdef12';
 process.env.AWS_LAMBDA_FUNCTION_NAME = 'my-lambda-function';
 process.env.AWS_EXECUTION_ENV = 'nodejs16.x';
 process.env.AWS_LAMBDA_FUNCTION_MEMORY_SIZE = '128';
-process.env.AWS_REGION = 'eu-west-1';
+if (process.env.AWS_REGION === undefined && process.env.CDK_DEFAULT_REGION === undefined) {
+  process.env.AWS_REGION = 'eu-west-1';
+}
 process.env._HANDLER = 'index.handler';
 
 // Powertools variables