src/test/java/com/android/tools/r8/proguard/configuration/ProguardRuleWithEllipsisForReturnTypeTest.java

// Copyright (c) 2019, 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.proguard.configuration;

import static com.android.tools.r8.utils.codeinspector.Matchers.isPresent;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.junit.Assume.assumeTrue;

import com.android.tools.r8.TestBase;
import com.android.tools.r8.TestParameters;
import com.android.tools.r8.TestParametersCollection;
import com.android.tools.r8.utils.StringUtils;
import com.android.tools.r8.utils.codeinspector.ClassSubject;
import com.android.tools.r8.utils.codeinspector.CodeInspector;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameter;
import org.junit.runners.Parameterized.Parameters;

@RunWith(Parameterized.class)
public class ProguardRuleWithEllipsisForReturnTypeTest extends TestBase {

  private static final Class<?> clazz = ProguardRuleWithEllipsisForReturnTypeTestClass.class;
  private static final String expectedOutput = StringUtils.lines("Hello world!");
  
  @Parameter public TestParameters parameters;

  @Parameters(name = "{0}")
  public static TestParametersCollection data() {
    return getTestParameters().withAllRuntimesAndApiLevels().build();
  }

  @Test
  public void testR8() throws Exception {
    testForR8(parameters.getBackend())
        .addProgramClasses(clazz)
        .addKeepRules(
            "-keep class " + clazz.getTypeName() + " {",
            "  private static ... unused;",
            "  public static ... main(...);",
            "}")
        .run(parameters.getRuntime(), clazz)
        .assertSuccessWithOutput(expectedOutput)
        .inspect(this::inspect);
  }

  @Test
  public void testProguard() throws Exception {
    assumeTrue(parameters.isCfRuntime());
    testForProguard()
        .addProgramClasses(clazz)
        .addKeepRules(
            "-keep class " + clazz.getTypeName() + " {",
            "  private static ... unused;",
            "  public static ... main(...);",
            "}")
        .run(parameters.getRuntime(), clazz)
        .assertSuccessWithOutput(expectedOutput)
        .inspect(this::inspect);
  }

  private void inspect(CodeInspector inspector) {
    ClassSubject classSubject = inspector.clazz(clazz);
    assertThat(classSubject, isPresent());
    assertThat(classSubject.uniqueFieldWithName("unused"), isPresent());
    assertThat(classSubject.uniqueMethodWithName("main"), isPresent());
  }
}

class ProguardRuleWithEllipsisForReturnTypeTestClass {

  private static Object unused = new Object();

  public static void main(String[] args) {
    System.out.println("Hello world!");
  }
}