Add an integration test using the example

Author: clareliguori

.travis.yml

@@ -0,0 +1,12 @@
+language: go
+
+services:
+  - docker
+
+go_import_path: github.com/awslabs/aws-lambda-container-image-converter
+
+go:
+    - 1.11.x
+
+script:
+    - make install-deps build test integration-test stage-release-binaries

Makefile

@@ -27,6 +27,10 @@ $(LOCAL_BINARY): $(SOURCES) GITCOMMIT_SHA
 test:
 	go test -v -timeout 30s -short -cover $(shell go list ./img2lambda/... | grep -v /vendor/)
 
+.PHONY: integration-test
+integration-test: $(LOCAL_BINARY)
+	./scripts/build_example.sh
+
 .PHONY: generate
 generate: $(SOURCES)
 	PATH=$(LOCAL_PATH) go generate -x $(shell go list ./img2lambda/... | grep -v '/vendor/')
@@ -86,4 +90,5 @@ GITCOMMIT_SHA: $(GITFILES)
 clean:
 	- rm -rf ./bin
 	- rm -rf ./output
+	- rm -rf ./example/output
 	- rm -f GITCOMMIT_SHA

scripts/build_example.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+set -e
+
+# Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+# SPDX-License-Identifier: MIT-0
+
+# Normalize to working directory being build root (up one level from ./scripts)
+ROOT=$( cd "$( dirname "${BASH_SOURCE[0]}" )/.." && pwd )
+cd "${ROOT}"
+
+cd "${ROOT}"/example
+
+# Build the example and parse the layers
+docker build -t lambda-php .
+
+docker run lambda-php hello '{"name": "World"}'
+
+docker run lambda-php goodbye '{"name": "World"}'
+
+../bin/local/img2lambda -i lambda-php:latest --dry-run
+
+# Look for the 2 layers that contain files in opt/
+ls output/layer-1.zip
+ls output/layer-2.zip