src/test/java/com/android/tools/r8/kotlin/metadata/MetadataStripTest.java

// Copyright (c) 2018, 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.kotlin.metadata;

import static com.android.tools.r8.utils.codeinspector.Matchers.isPresent;
import static com.android.tools.r8.utils.codeinspector.Matchers.isPresentAndNotRenamed;
import static com.android.tools.r8.utils.codeinspector.Matchers.isPresentAndRenamed;
import static org.hamcrest.CoreMatchers.equalTo;
import static org.hamcrest.CoreMatchers.not;
import static org.hamcrest.MatcherAssert.assertThat;

import com.android.tools.r8.R8TestRunResult;
import com.android.tools.r8.TestParameters;
import com.android.tools.r8.ToolHelper;
import com.android.tools.r8.ToolHelper.KotlinTargetVersion;
import com.android.tools.r8.shaking.ProguardKeepAttributes;
import com.android.tools.r8.utils.codeinspector.AnnotationSubject;
import com.android.tools.r8.utils.codeinspector.ClassSubject;
import com.android.tools.r8.utils.codeinspector.CodeInspector;
import java.util.Collection;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;

@RunWith(Parameterized.class)
public class MetadataStripTest extends KotlinMetadataTestBase {

  private final TestParameters parameters;

  @Parameterized.Parameters(name = "{0} target: {1}")
  public static Collection<Object[]> data() {
    return buildParameters(
        getTestParameters().withAllRuntimesAndApiLevels().build(), KotlinTargetVersion.values());
  }

  public MetadataStripTest(TestParameters parameters, KotlinTargetVersion targetVersion) {
    super(targetVersion);
    this.parameters = parameters;
  }

  @Test
  public void testJstyleRunnable() throws Exception {
    final String folder = "lambdas_jstyle_runnable";
    final String mainClassName = "lambdas_jstyle_runnable.MainKt";
    final String implementer1ClassName = "lambdas_jstyle_runnable.Implementer1Kt";
    R8TestRunResult result =
        testForR8(parameters.getBackend())
            .addProgramFiles(getKotlinJarFile(folder))
            .addProgramFiles(getJavaJarFile(folder))
            .addProgramFiles(ToolHelper.getKotlinReflectJar())
            .addKeepMainRule(mainClassName)
            .addKeepKotlinMetadata()
            .addKeepAttributes(ProguardKeepAttributes.RUNTIME_VISIBLE_ANNOTATIONS)
            .allowDiagnosticWarningMessages()
            .setMinApi(parameters.getApiLevel())
            .compile()
            .assertAllWarningMessagesMatch(
                equalTo("Resource 'META-INF/MANIFEST.MF' already exists."))
            .run(parameters.getRuntime(), mainClassName);
    CodeInspector inspector = result.inspector();
    ClassSubject clazz = inspector.clazz(mainClassName);
    assertThat(clazz, isPresentAndNotRenamed());
    // Main class is kept, hence the presence of Metadata.
    AnnotationSubject annotationSubject = clazz.annotation(METADATA_TYPE);
    assertThat(annotationSubject, isPresent());
    ClassSubject impl1 = inspector.clazz(implementer1ClassName);
    assertThat(impl1, isPresentAndRenamed());
    // All other classes can be renamed, hence the absence of Metadata;
    assertThat(impl1.annotation(METADATA_TYPE), not(isPresent()));
  }
}