test(WRITING-11435): test lambda function

Author: durran

.gitignore

@@ -87,3 +87,7 @@ etc/docs/build
 !docs/**/*.png
 !docs/**/*.css
 !docs/**/*.js
+
+# AWS SAM generated
+test/lambda/.aws-sam
+test/lambda/env.json

test/lambda/events/event.json

@@ -0,0 +1,62 @@
+{
+  "body": "{\"message\": \"hello world\"}",
+  "resource": "/{proxy+}",
+  "path": "/path/to/resource",
+  "httpMethod": "POST",
+  "isBase64Encoded": false,
+  "queryStringParameters": {
+    "foo": "bar"
+  },
+  "pathParameters": {
+    "proxy": "/path/to/resource"
+  },
+  "stageVariables": {
+    "baz": "qux"
+  },
+  "headers": {
+    "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
+    "Accept-Encoding": "gzip, deflate, sdch",
+    "Accept-Language": "en-US,en;q=0.8",
+    "Cache-Control": "max-age=0",
+    "CloudFront-Forwarded-Proto": "https",
+    "CloudFront-Is-Desktop-Viewer": "true",
+    "CloudFront-Is-Mobile-Viewer": "false",
+    "CloudFront-Is-SmartTV-Viewer": "false",
+    "CloudFront-Is-Tablet-Viewer": "false",
+    "CloudFront-Viewer-Country": "US",
+    "Host": "1234567890.execute-api.us-east-1.amazonaws.com",
+    "Upgrade-Insecure-Requests": "1",
+    "User-Agent": "Custom User Agent String",
+    "Via": "1.1 08f323deadbeefa7af34d5feb414ce27.cloudfront.net (CloudFront)",
+    "X-Amz-Cf-Id": "cDehVQoZnx43VYQb9j2-nvCh-9z396Uhbp027Y2JvkCPNLmGJHqlaA==",
+    "X-Forwarded-For": "127.0.0.1, 127.0.0.2",
+    "X-Forwarded-Port": "443",
+    "X-Forwarded-Proto": "https"
+  },
+  "requestContext": {
+    "accountId": "123456789012",
+    "resourceId": "123456",
+    "stage": "prod",
+    "requestId": "c6af9ac6-7b61-11e6-9a41-93e8deadbeef",
+    "requestTime": "09/Apr/2015:12:34:56 +0000",
+    "requestTimeEpoch": 1428582896000,
+    "identity": {
+      "cognitoIdentityPoolId": null,
+      "accountId": null,
+      "cognitoIdentityId": null,
+      "caller": null,
+      "accessKey": null,
+      "sourceIp": "127.0.0.1",
+      "cognitoAuthenticationType": null,
+      "cognitoAuthenticationProvider": null,
+      "userArn": null,
+      "userAgent": "Custom User Agent String",
+      "user": null
+    },
+    "path": "/prod/path/to/resource",
+    "resourcePath": "/{proxy+}",
+    "httpMethod": "POST",
+    "apiId": "1234567890",
+    "protocol": "HTTP/1.1"
+  }
+}

test/lambda/mongodb/.eslintignore

@@ -0,0 +1,2 @@
+node_modules
+.aws-sam

test/lambda/mongodb/.eslintrc.js

@@ -0,0 +1,15 @@
+module.exports = {
+    parser: "@typescript-eslint/parser",
+    parserOptions: {
+      ecmaVersion: 2020, // Allows for the parsing of modern ECMAScript features
+      sourceType: "module" 
+    },
+    extends: [
+      "plugin:@typescript-eslint/recommended", // recommended rules from the @typescript-eslint/eslint-plugin
+      "plugin:prettier/recommended" // Enables eslint-plugin-prettier and eslint-config-prettier. This will display prettier errors as ESLint errors. Make sure this is always the last configuration in the extends array.
+    ],
+    rules: {
+      // Place to specify ESLint rules. Can be used to overwrite rules specified from the extended configs
+      // e.g. "@typescript-eslint/explicit-function-return-type": "off",
+    }
+  };

test/lambda/mongodb/.npmignore

@@ -0,0 +1 @@
+tests/*

test/lambda/mongodb/.prettierrc.js

@@ -0,0 +1,7 @@
+module.exports = {
+    semi: true,
+    trailingComma: "all",
+    singleQuote: true,
+    printWidth: 120,
+    tabWidth: 4
+  };

test/lambda/mongodb/app.mjs

@@ -0,0 +1,71 @@
+import { MongoClient } from 'mongodb';
+
+// Creates the client that is cached for all requests, subscribes to
+// relevant events, and forces the connection pool to get populated.
+const mongoClient = new MongoClient(process.env.MONGODB_URI, {
+  monitorCommands: true
+});
+
+mongoClient.on('commandStarted', (event) => {
+  console.log('commandStarted', event);
+});
+
+mongoClient.on('commandSucceeded', (event) => {
+  console.log('commandSucceeded', event);
+});
+
+mongoClient.on('commandFailed', (event) => {
+  console.log('commandFailed', event);
+});
+
+mongoClient.on('serverHeartbeatStarted', (event) => {
+  console.log('serverHeartbeatStarted', event);
+});
+
+mongoClient.on('serverHeartbeatSucceeded', (event) => {
+  console.log('serverHeartbeatSucceeded', event);
+});
+
+mongoClient.on('serverHeartbeatFailed', (event) => {
+  console.log('serverHeartbeatFailed', event);
+});
+
+mongoClient.on('connectionCreated', (event) => {
+  console.log('connectionCreated', event);
+});
+
+mongoClient.on('connectionClosed', (event) => {
+  console.log('connectionClosed', event);
+});
+
+// Populate the connection pool.
+await mongoClient.connect();
+
+/**
+ * The handler function itself performs an insert/delete and returns the
+ * id of the document in play.
+ *
+ * @param {Object} event - API Gateway Lambda Proxy Input Format
+ * @returns {Object} object - API Gateway Lambda Proxy Output Format
+ */
+export const lambdaHandler = async (event) => {
+  const db = mongoClient.db('lambdaTest');
+  const collection = db.collection('test');
+  const { insertedId } = await collection.insertOne({ n: 1 });
+  await collection.deleteOne({ _id: insertedId });
+  try {
+    return {
+      statusCode: 200,
+      body: JSON.stringify({
+        insertedId: insertedId,
+      }),
+    };
+  } catch (err) {
+    return {
+      statusCode: 500,
+      body: JSON.stringify({
+        message: err.message,
+      }),
+    };
+  }
+};