add integration test for platform tags

Author: eifinger

jib-core/src/integration-test/java/com/google/cloud/tools/jib/api/ContainerizerIntegrationTest.java

@@ -19,13 +19,15 @@
 import com.google.cloud.tools.jib.Command;
 import com.google.cloud.tools.jib.api.buildplan.AbsoluteUnixPath;
 import com.google.cloud.tools.jib.api.buildplan.FileEntriesLayer;
+import com.google.cloud.tools.jib.api.buildplan.Platform;
 import com.google.cloud.tools.jib.event.events.ProgressEvent;
 import com.google.cloud.tools.jib.event.progress.ProgressEventHandler;
 import com.google.cloud.tools.jib.global.JibSystemProperties;
 import com.google.cloud.tools.jib.registry.LocalRegistry;
 import com.google.common.base.Splitter;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.ImmutableSet;
 import com.google.common.io.Resources;
 import java.io.IOException;
 import java.net.URISyntaxException;
@@ -35,6 +37,8 @@
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
+import java.util.Objects;
+import java.util.Set;
 import java.util.concurrent.ExecutionException;
 import java.util.stream.Stream;
 import org.hamcrest.CoreMatchers;
@@ -83,6 +87,8 @@ private void checkCompletion() {
   private static final Logger logger = LoggerFactory.getLogger(ContainerizerIntegrationTest.class);
   private static final String DISTROLESS_DIGEST =
       "sha256:f488c213f278bc5f9ffe3ddf30c5dbb2303a15a74146b738d12453088e662880";
+  private static final String MULTI_PLATFORM_DIGEST =
+      "sha256:c737fc29fc2556d3377d6a719a9842a500777fce35a7f1299acd569c73f65247";
   private static final double DOUBLE_ERROR_MARGIN = 1e-10;
 
   public static ImmutableList<FileEntriesLayer> fakeLayerConfigurations;
@@ -228,6 +234,30 @@ public void testSteps_forBuildToDockerRegistry_multipleTags()
         new Command("docker", "run", "--rm", imageReference3).run());
   }
 
+  @Test
+  public void testSteps_forBuildToDockerRegistry_multiplePlatforms()
+      throws IOException, InterruptedException, ExecutionException, RegistryException,
+          CacheDirectoryCreationException, InvalidImageReferenceException {
+    buildImage(
+        ImageReference.of("gcr.io", "distroless/java17-debian11", MULTI_PLATFORM_DIGEST),
+        Containerizer.to(RegistryImage.named(dockerHost + ":5000/testimage:testtag")),
+        Collections.singletonList("testtag"),
+        ImmutableSet.of(new Platform("amd64", "linux"), new Platform("arm64", "linux")));
+
+    String imageReference = dockerHost + ":5000/testimage:testtag-amd64";
+    localRegistry.pull(imageReference);
+    assertDockerInspect(imageReference);
+    Assert.assertEquals(
+        "Hello, world. An argument.\n", new Command("docker", "run", "--rm", imageReference).run());
+
+    String imageReference2 = dockerHost + ":5000/testimage:testtag-arm64";
+    localRegistry.pull(imageReference2);
+    assertDockerInspect(imageReference2);
+    Assert.assertEquals(
+        "Hello, world. An argument.\n",
+        new Command("docker", "run", "--rm", imageReference2).run());
+  }
+
   @Test
   public void testSteps_forBuildToDockerRegistry_skipExistingDigest()
       throws IOException, InterruptedException, ExecutionException, RegistryException,
@@ -336,6 +366,16 @@ private JibContainer buildImage(
       ImageReference baseImage, Containerizer containerizer, List<String> additionalTags)
       throws IOException, InterruptedException, RegistryException, CacheDirectoryCreationException,
           ExecutionException {
+    return buildImage(baseImage, containerizer, additionalTags, null);
+  }
+
+  private JibContainer buildImage(
+      ImageReference baseImage,
+      Containerizer containerizer,
+      List<String> additionalTags,
+      Set<Platform> additionalPlatforms)
+      throws IOException, InterruptedException, RegistryException, CacheDirectoryCreationException,
+          ExecutionException {
     JibContainerBuilder containerBuilder =
         Jib.from(baseImage)
             .setEntrypoint(
@@ -346,6 +386,9 @@ private JibContainer buildImage(
             .setExposedPorts(Ports.parse(Arrays.asList("1000", "2000-2002/tcp", "3000/udp")))
             .setLabels(ImmutableMap.of("key1", "value1", "key2", "value2"))
             .setFileEntriesLayers(fakeLayerConfigurations);
+    if (Objects.nonNull(additionalPlatforms)) {
+      containerBuilder.setPlatforms(additionalPlatforms);
+    }
 
     containerizer
         .setAllowInsecureRegistries(true)