Regression test for no mapping file output.
Bug: 202076520
Change-Id: I307e6cf090fe341bf72a708f1bd1d458142136ed
diff --git a/src/test/java/com/android/tools/r8/naming/IdentityMappingFileTest.java b/src/test/java/com/android/tools/r8/naming/IdentityMappingFileTest.java
new file mode 100644
index 0000000..d788387
--- /dev/null
+++ b/src/test/java/com/android/tools/r8/naming/IdentityMappingFileTest.java
@@ -0,0 +1,99 @@
+// Copyright (c) 2021, the R8 project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+package com.android.tools.r8.naming;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+
+import com.android.tools.r8.DexIndexedConsumer;
+import com.android.tools.r8.DiagnosticsHandler;
+import com.android.tools.r8.R8;
+import com.android.tools.r8.R8Command;
+import com.android.tools.r8.StringConsumer.ForwardingConsumer;
+import com.android.tools.r8.TestBase;
+import com.android.tools.r8.TestParameters;
+import com.android.tools.r8.TestParametersCollection;
+import com.android.tools.r8.ToolHelper;
+import com.android.tools.r8.origin.Origin;
+import com.android.tools.r8.utils.AndroidApiLevel;
+import com.android.tools.r8.utils.BooleanBox;
+import com.google.common.collect.ImmutableList;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+
+@RunWith(Parameterized.class)
+public class IdentityMappingFileTest extends TestBase {
+
+ @Parameterized.Parameters(name = "{0}")
+ public static TestParametersCollection data() {
+ return getTestParameters().withNoneRuntime().build();
+ }
+
+ public IdentityMappingFileTest(TestParameters parameters) {
+ parameters.assertNoneRuntime();
+ }
+
+ @Test
+ public void testTheTestBuilder() throws Exception {
+ String mapping =
+ testForR8(Backend.DEX)
+ .addProgramClasses(Main.class)
+ .setMinApi(AndroidApiLevel.B)
+ .addKeepMainRule(Main.class)
+ .compile()
+ .getProguardMap();
+ // TODO(b/202076520): The identity mapping content should at minimum include the header info.
+ assertEquals("", mapping);
+ }
+
+ @Test
+ public void testFileOutput() throws Exception {
+ Path mappingPath = temp.newFolder().toPath().resolve("mapping.map");
+ R8.run(
+ R8Command.builder()
+ .addProgramFiles(ToolHelper.getClassFileForTestClass(Main.class))
+ .addProguardConfiguration(
+ ImmutableList.of(keepMainProguardConfiguration(Main.class)), Origin.unknown())
+ .addLibraryFiles(ToolHelper.getJava8RuntimeJar())
+ .setProguardMapOutputPath(mappingPath)
+ .setProgramConsumer(DexIndexedConsumer.emptyConsumer())
+ .build());
+ // TODO(b/202076520): The identity mapping should we written to the file.
+ assertFalse(Files.exists(mappingPath));
+ }
+
+ @Test
+ public void testStringConsumer() throws Exception {
+ BooleanBox consumerWasCalled = new BooleanBox(false);
+ R8.run(
+ R8Command.builder()
+ .addProgramFiles(ToolHelper.getClassFileForTestClass(Main.class))
+ .addProguardConfiguration(
+ ImmutableList.of(keepMainProguardConfiguration(Main.class)), Origin.unknown())
+ .addLibraryFiles(ToolHelper.getJava8RuntimeJar())
+ .setProguardMapConsumer(
+ new ForwardingConsumer(null) {
+ @Override
+ public void finished(DiagnosticsHandler handler) {
+ consumerWasCalled.set(true);
+ }
+ })
+ .setProgramConsumer(DexIndexedConsumer.emptyConsumer())
+ .build());
+ // TODO(b/202076520): The identity mapping should at least still signal finish to the consumer.
+ assertFalse(consumerWasCalled.get());
+ }
+
+ // Compiling this program with a keep main will result in an identity mapping for the residual
+ // program. The (identity) mapping should still be created and emitted to the client.
+ static class Main {
+
+ public static void main(String[] args) {
+ System.out.println("Hello world!");
+ }
+ }
+}
