middy - npm Package Compare versions

Comparing version 0.27.1 to 0.28.0

middlewares.d.ts

@@ -84,2 +84,3 @@ import { SSM } from 'aws-sdk'
   onWarmup?: (event: any) => void;
+  waitForEmptyEventLoop?: boolean;
 }
@@ -86,0 +87,0 @@

package.json

 {
   "name": "middy",
-  "version": "0.27.1",
+  "version": "0.28.0",
   "description": "🛵 The stylish Node.js middleware engine for AWS Lambda",
@@ -5,0 +5,0 @@ "main": "./index.js",

src/middlewares/__tests__/warmup.js

@@ -78,2 +78,67 @@ const middy = require('../../middy')
   })
+
+  test(`Should execute handler with callbackWaitsForEmptyEventLoop if waitForEmptyEventLoop true`, (endTest) => {
+    console.log = jest.fn()
+
+    const handler = middy((event, context, cb) => {
+      cb()
+    })
+    handler.use(lambdaIsWarmingUp({
+      waitForEmptyEventLoop: true
+    }))
+
+    const event = {
+      source: 'serverless-plugin-warmup'
+    }
+    const context = {}
+    handler(event, context, (_, response) => {
+      expect(context.callbackWaitsForEmptyEventLoop).toBe(true)
+      expect(response).toBe('warmup')
+      endTest()
+    })
+  })
+
+  test(`Should execute handler with callbackWaitsForEmptyEventLoop if waitForEmptyEventLoop false`, (endTest) => {
+    console.log = jest.fn()
+
+    const handler = middy((event, context, cb) => {
+      cb()
+    })
+    handler.use(lambdaIsWarmingUp({
+      waitForEmptyEventLoop: false
+    }))
+
+    const event = {
+      source: 'serverless-plugin-warmup'
+    }
+    const context = {
+      callbackWaitsForEmptyEventLoop: true
+    }
+    handler(event, context, (_, response) => {
+      expect(context.callbackWaitsForEmptyEventLoop).toBe(false)
+      expect(response).toBe('warmup')
+      endTest()
+    })
+  })
+
+  test(`Should execute handler with callbackWaitsForEmptyEventLoop unchanged if waitForEmptyEventLoop is not set`, (endTest) => {
+    console.log = jest.fn()
+
+    const handler = middy((event, context, cb) => {
+      cb()
+    })
+    handler.use(lambdaIsWarmingUp({}))
+
+    const event = {
+      source: 'serverless-plugin-warmup'
+    }
+    const context = {
+      callbackWaitsForEmptyEventLoop: true
+    }
+    handler(event, context, (_, response) => {
+      expect(context.callbackWaitsForEmptyEventLoop).toBe(true)
+      expect(response).toBe('warmup')
+      endTest()
+    })
+  })
 })

src/middlewares/warmup.js

 module.exports = (config) => {
   const defaults = {
     isWarmingUp: (event) => event.source === 'serverless-plugin-warmup',
-    onWarmup: (event) => console.log('Exiting early via warmup Middleware')
+    onWarmup: (event) => console.log('Exiting early via warmup Middleware'),
+    waitForEmptyEventLoop: null
   }
@@ -13,2 +14,5 @@
         options.onWarmup(handler.event)
+        if (options.waitForEmptyEventLoop !== null) {
+          handler.context.callbackWaitsForEmptyEventLoop = Boolean(options.waitForEmptyEventLoop)
+        }
         return handler.callback(null, 'warmup')
@@ -15,0 +19,0 @@ }

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Improved metrics

Total package byte prevSize

184321

increased by1.09%

Lines of code

4656

increased by1.33%

No dependency changes