add integration tests

integration/dockerfiles/Dockerfile_test_run_redo

@@ -0,0 +1,26 @@
+# Copyright 2020 Google, Inc. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+FROM debian:9.11
+RUN echo "hey" > /etc/foo
+RUN echo "baz" > /etc/baz
+RUN cp /etc/baz /etc/bar
+RUN rm /etc/baz
+
+# Test with ARG
+ARG file
+RUN echo "run" > $file
+
+RUN echo "test home" > $HOME/file
+COPY context/foo $HOME/foo

integration/images.go

@@ -48,6 +48,7 @@ const (
 // Arguments to build Dockerfiles with, used for both docker and kaniko builds
 var argsMap = map[string][]string{
 	"Dockerfile_test_run":        {"file=/file"},
+	"Dockerfile_test_run_redo":   {"file=/file"},
 	"Dockerfile_test_workdir":    {"workdir=/arg/workdir"},
 	"Dockerfile_test_add":        {"file=context/foo"},
 	"Dockerfile_test_arg_secret": {"SSH_PRIVATE_KEY", "SSH_PUBLIC_KEY=Pµbl1cK€Y"},
@@ -74,6 +75,7 @@ var additionalDockerFlagsMap = map[string][]string{
 // Arguments to build Dockerfiles with when building with kaniko
 var additionalKanikoFlagsMap = map[string][]string{
 	"Dockerfile_test_add":        {"--single-snapshot"},
+	"Dockerfile_test_run_redo":   {"--snapshotMode=redo"},
 	"Dockerfile_test_scratch":    {"--single-snapshot"},
 	"Dockerfile_test_maintainer": {"--single-snapshot"},
 	"Dockerfile_test_target":     {"--target=second"},