adding some simple tests using bats-core

.semaphore/semaphore.yml

@@ -13,7 +13,14 @@ blocks:
         commands:
           # Authenticate to the registry for all jobs in the block
           - echo "${DOCKER_PASSWORD}" | docker login -u "${DOCKER_USERNAME}" --password-stdin
+          - git clone https://github.com/bats-core/bats-core.git
+          - cd bats-core
+          - sudo ./install.sh /usr/local
       jobs:
+      - name: Tests
+        commands:
+          - checkout
+          - sudo bats tests
       - name: Docker build
         commands:
           - checkout

tests/nginx-proxy.bats

@@ -0,0 +1,68 @@
+#!/usr/bin/env bats
+
+BASE=recipes/docker-compose/simple
+setup () {
+    if [[ "$BATS_TEST_NUMBER" -eq 1 ]]; then
+        docker-compose -f $BASE/docker-compose.yml up -d
+        timeout 2m bash -c 'while [[ "$(curl -s -o /dev/null -w ''%{http_code}'' localhost/healthcheck)" != "200" ]]; do sleep 5; done' || false
+        rm -rf $BASE/data/*
+    fi
+}
+
+@test "PNG returns an image/png content-type" {
+    curl -sSL -D - http://localhost/unsafe/500x150/i.imgur.com/Nfn80ck.png -o /dev/null |grep 'Content-Type: image/png'
+}
+
+@test "PNG result is cached" {
+    ls $BASE/data/result_storage/default/8b/83/b846d9575c01f23bff9f430d5f81f16c44cb
+    curl -sSL -D - http://localhost/unsafe/500x150/i.imgur.com/Nfn80ck.png -o /dev/null |grep 'Content-Type: image/png'
+}
+
+@test "next PNG request is fetched from cache" {
+    echo 1234 > $BASE/data/result_storage/default/8b/83/b846d9575c01f23bff9f430d5f81f16c44cb
+    curl -H -sSL -D - http://localhost/unsafe/500x150/i.imgur.com/Nfn80ck.png |tail -1 |grep 1234
+}
+
+@test "AUTO_WEBP returns an image/webp image" {
+    curl -H 'Accept: image/webp' -sSL -D - http://localhost/unsafe/500x150/i.imgur.com/Nfn80ck.png -o /dev/null |grep 'Content-Type: image/webp'
+}
+
+@test "AUTO_WEBP result is cached" {
+    ls $BASE/data/result_storage/auto_webp/8b/83/b846d9575c01f23bff9f430d5f81f16c44cb
+    curl -H 'Accept: image/webp' -sSL -D - http://localhost/unsafe/500x150/i.imgur.com/Nfn80ck.png -o /dev/null |grep 'Content-Type: image/webp'
+}
+
+@test "next WEBP request is fetched from cache" {
+    echo 1234 > $BASE/data/result_storage/auto_webp/8b/83/b846d9575c01f23bff9f430d5f81f16c44cb
+    curl -H 'Accept: image/webp' -sSL -D - http://localhost/unsafe/500x150/i.imgur.com/Nfn80ck.png |tail -1 |grep 1234
+}
+
+@test "filters:format(jpeg) returns an image/jpeg content-type" {
+    rm -f $BASE/data/result_storage/default/8b/83/b846d9575c01f23bff9f430d5f81f16c44cb
+    curl -sSL -D - 'http://localhost/unsafe/500x150/filters:format(jpeg)/i.imgur.com/Nfn80ck.png' -o /dev/null |grep 'Content-Type: image/jpeg'
+}
+
+@test "filters:format(jpeg) result is cached" {
+    ls $BASE/data/result_storage/default/77/1f/8c8786e4ad7ed364b2ea722fbe8f3ec043b6
+    curl -sSL -D - 'http://localhost/unsafe/500x150/filters:format(jpeg)/i.imgur.com/Nfn80ck.png' -o /dev/null |grep 'Content-Type: image/jpeg'
+}
+
+@test "next filters:format(jpeg) request is fetched from cache" {
+    echo 1234 > $BASE/data/result_storage/default/77/1f/8c8786e4ad7ed364b2ea722fbe8f3ec043b6
+    curl -sSL -D - 'http://localhost/unsafe/500x150/filters:format(jpeg)/i.imgur.com/Nfn80ck.png' |tail -1 |grep 1234
+}
+
+@test "filters:format(webp) returns an image/webp content-type" {
+    rm -f $BASE/data/result_storage/default/a4/5a/9b7ed7290937d3c996c178141ae5517f8567
+    curl -sSL -D - 'http://localhost/unsafe/500x150/filters:format(webp)/i.imgur.com/Nfn80ck.png' -o /dev/null |grep 'Content-Type: image/webp'
+}
+
+@test "filters:format(webp) result is cached" {
+    ls $BASE/data/result_storage/default/a4/5a/9b7ed7290937d3c996c178141ae5517f8567
+    curl -sSL -D - 'http://localhost/unsafe/500x150/filters:format(webp)/i.imgur.com/Nfn80ck.png' -o /dev/null |grep 'Content-Type: image/webp'
+}
+
+@test "next filters:format(webp) request is fetched from cache" {
+    echo 1234 > $BASE/data/result_storage/default/a4/5a/9b7ed7290937d3c996c178141ae5517f8567
+    curl -sSL -D - 'http://localhost/unsafe/500x150/filters:format(webp)/i.imgur.com/Nfn80ck.png' |tail -1 |grep 1234
+}