test: add smoke test script

readme.md

@@ -40,6 +40,8 @@ unsupported by Tesseract file extensions.
 
 See [compile-tesseract.sh](compile-tesseract.sh) & [compress-with-brotli.sh](compress-with-brotli.sh) files
 
+Smoke test that it works by running `test.sh` script
+
 ## See Also
 
 - [aws-lambda-libreoffice](https://github.com/shelfio/aws-lambda-libreoffice)

test.js

@@ -0,0 +1,9 @@
+/* eslint-disable @typescript-eslint/no-var-requires */
+const {execSync} = require('child_process');
+const {getTextFromImage} = require('./src');
+
+module.exports.handler = async () => {
+  execSync(`cp ./test.png /tmp/test.png`);
+
+  return getTextFromImage('/tmp/test.png');
+};

test.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+docker run --rm \
+  -v "$PWD":/var/task \
+  lambci/lambda:nodejs8.10 test.handler