Add JavaCompilationArtifactsTest.

PiperOrigin-RevId: 408075514

src/test/java/com/google/devtools/build/lib/view/java/JavaCompilationArtifactsTest.java

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+// Copyright 2021 The Bazel Authors. 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.
+package com.google.devtools.build.lib.view.java;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import com.google.devtools.build.lib.actions.Artifact;
+import com.google.devtools.build.lib.actions.ArtifactRoot;
+import com.google.devtools.build.lib.actions.ArtifactRoot.RootType;
+import com.google.devtools.build.lib.actions.util.ActionsTestUtil;
+import com.google.devtools.build.lib.rules.java.JavaCompilationArtifacts;
+import com.google.devtools.build.lib.testutil.FoundationTestCase;
+import com.google.devtools.build.lib.vfs.Path;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/** Unit Test for {@link JavaCompilationArtifacts} */
+@RunWith(JUnit4.class)
+public class JavaCompilationArtifactsTest extends FoundationTestCase {
+
+  @Test
+  public void testSimple() {
+    Path execRoot = scratch.getFileSystem().getPath("/exec");
+    String outSegment = "root";
+    ArtifactRoot root = ArtifactRoot.asDerivedRoot(execRoot, RootType.Output, outSegment);
+    Artifact runtimeJar = ActionsTestUtil.createArtifact(root, "rt.jar");
+    Artifact compileTimeJar = ActionsTestUtil.createArtifact(root, "ct.jar");
+    JavaCompilationArtifacts original =
+        new JavaCompilationArtifacts.Builder()
+            .addRuntimeJar(runtimeJar)
+            .addCompileTimeJarAsFullJar(compileTimeJar)
+            .build();
+    assertThat(original.getRuntimeJars()).containsExactly(runtimeJar);
+    assertThat(original.getCompileTimeJars()).containsExactly(compileTimeJar);
+  }
+
+  @Test
+  public void testDuplicates() {
+    Path execRoot = scratch.getFileSystem().getPath("/exec");
+    ArtifactRoot root = ArtifactRoot.asDerivedRoot(execRoot, RootType.Output, "root");
+    Artifact runtimeJar = ActionsTestUtil.createArtifact(root, "rt.jar");
+    Artifact compileTimeJar = ActionsTestUtil.createArtifact(root, "ct.jar");
+
+    JavaCompilationArtifacts.Builder builder = new JavaCompilationArtifacts.Builder();
+    // Add the same jars to the builder twice.
+    builder.addRuntimeJar(runtimeJar).addCompileTimeJarAsFullJar(compileTimeJar);
+    builder
+        .addRuntimeJar(runtimeJar)
+        .addCompileTimeJarAsFullJar(compileTimeJar)
+        .build();
+    JavaCompilationArtifacts artifacts = builder.build();
+    // There is only a single instance of each jar in the final artifact collection.
+    assertThat(artifacts.getRuntimeJars()).containsExactly(runtimeJar);
+    assertThat(artifacts.getCompileTimeJars()).containsExactly(compileTimeJar);
+  }
+}