Fexed issues under node 10

Author: Szpadel

.dockerignore

@@ -0,0 +1,4 @@
+.git
+node_modules
+/*.zip
+.history

__tests__/lib/brotli/compress.test.js

@@ -5,8 +5,10 @@ describe('brotli compress', () => {
         jest.resetModules();
     });
 
-    test('returns a promise', () => {
-        expect(typeof compress('').then).toBe('function');
+    test('returns a promise', async () => {
+        const result = compress('');
+        expect(typeof result.then).toBe('function');
+        await result;
     });
 
     test('resolves a promise with Buffer object', async () => {
@@ -17,7 +19,7 @@ describe('brotli compress', () => {
 
     test('result output is smaller then input', async () => {
         const input = 'test input to compress';
-        const output = await compress(input).toString();
+        const output = (await compress(input)).toString();
 
         expect(output.length).toBeLessThan(input.length);
     });

__tests__/lib/gzip/compress.test.js

@@ -3,10 +3,12 @@ describe('gzip compress', () => {
         jest.resetModules();
     });
 
-    test('returns a promise', () => {
+    test('returns a promise', async () => {
         const compress = require('../../../lib/gzip/compress');
 
-        expect(typeof compress('').then).toBe('function');
+        const result = compress('');
+        expect(typeof result.then).toBe('function');
+        await result;
     });
 
     test('resolves a promise with Buffer object', async () => {

__tests__/lib/imagemin/compress.test.js

@@ -14,7 +14,9 @@ describe('imagemin compress', () => {
         );
         const compress = require('../../../lib/imagemin/compress');
 
-        expect(typeof compress(input).then).toBe('function');
+        const result = compress(input);
+        expect(typeof result.then).toBe('function');
+        await result;
     });
 
     test('resolves a promise with Buffer object', async () => {

__tests__/lib/webp/compress.test.js

@@ -16,7 +16,9 @@ describe('webp compress', () => {
         );
         const compress = require('../../../lib/webp/compress');
 
-        expect(typeof compress(input).then).toBe('function');
+        const result = compress(input);
+        expect(typeof result.then).toBe('function');
+        await result;
     });
 
     test('resolves a promise with Buffer object', async () => {

docker/test-node10.Dockerfile

@@ -0,0 +1,13 @@
+FROM node:10
+
+RUN apt update -y && apt install -y build-essential autoconf automake libjpeg-dev libpng-dev libtiff-dev
+
+ADD package.json yarn.lock /app/
+
+WORKDIR /app
+
+ENV JOBS=max
+RUN yarn
+
+ADD . /app/
+RUN yarn jest --version; yarn test

lib/gzip/compress.js

@@ -6,7 +6,7 @@
  * @param {Buffer|string} input Buffer instance or string to compress.
  * @returns {Promise<Buffer>} Promise that resolves with Buffer of compressed input.
  */
-module.exports = input =>
+module.exports = async (input) =>
     new Promise((resolve, reject) => {
         const { gzip } = require('zlib');
 

package.json

@@ -11,7 +11,8 @@
     "scripts": {
         "create-package": "docker run --rm -v \"$PWD\":/var/app mageops/aws-lambda-build nodejs-yarn edge-lambda-deploy-package",
         "precommit": "lint-staged",
-        "test": "jest"
+        "test": "jest",
+        "test-docker": "docker buildx build --pull -f docker/test-node10.Dockerfile ."
     },
     "devDependencies": {
         "eslint": "^6.8.0",