Add integration tests from Issues

integration-test.sh

@@ -37,4 +37,4 @@ fi
 echo "Running integration tests..."
 make out/executor
 make out/warmer
-go test ./integration/... -v --bucket "${GCS_BUCKET}" --repo "${IMAGE_REPO}" --timeout 30m "$@"
+go test ./integration/... -v --bucket "${GCS_BUCKET}" --repo "${IMAGE_REPO}" --timeout 50m "$@"

integration/dockerfiles/Dockerfile_test_issue_519

@@ -0,0 +1,12 @@
+FROM alpine as base_stage
+RUN echo base_stage
+RUN touch meow.txt
+
+FROM base_stage as BUG_stage
+RUN echo BUG_stage
+RUN touch purr.txt
+
+
+FROM BUG_stage as final_stage
+RUN echo final_stage
+RUN touch mew.txt

integration/dockerfiles/Dockerfile_test_issue_647

@@ -0,0 +1,12 @@
+FROM alpine:3.8 AS foo
+RUN mkdir /foo
+WORKDIR /foo
+RUN mkdir some_dir
+RUN touch some_file
+RUN chmod 777 some_dir
+RUN chmod 666 some_file
+RUN ls -l
+
+FROM alpine:3.8
+COPY --from=foo /foo /bar
+RUN ls -l /bar

integration/dockerfiles/Dockerfile_test_issue_684

@@ -0,0 +1,3 @@
+FROM ubuntu:rolling as builder
+
+RUN apt-get update && apt-get -y upgrade && apt-get -y install lib32stdc++6 wget

integration/dockerfiles/Dockerfile_test_issue_704

@@ -0,0 +1,5 @@
+FROM alpine
+
+RUN mkdir -p /some/dir/ && echo 'first' > /some/dir/first.txt
+
+RUN rm /some/dir/first.txt