src/test/java/com/android/tools/r8/naming/CovariantReturnTypeTest.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.naming;

import static com.android.tools.r8.utils.codeinspector.Matchers.isPresent;
import static com.android.tools.r8.utils.codeinspector.Matchers.isRenamed;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertThat;

import com.android.tools.r8.StringConsumer.FileConsumer;
import com.android.tools.r8.TestBase;
import com.android.tools.r8.jasmin.JasminBuilder;
import com.android.tools.r8.jasmin.JasminBuilder.ClassBuilder;
import com.android.tools.r8.utils.AndroidApp;
import com.android.tools.r8.utils.codeinspector.ClassSubject;
import com.android.tools.r8.utils.codeinspector.CodeInspector;
import com.android.tools.r8.utils.codeinspector.MethodSubject;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import java.io.File;
import java.nio.file.Path;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import org.junit.Ignore;
import org.junit.Test;

public class CovariantReturnTypeTest extends TestBase {

  @Ignore("b/115613850")
  @Test
  public void test() throws Exception {
    for (int i = 0; i < 3; i++) {
      JasminBuilder appBuilder = new JasminBuilder();
      ClassBuilder classBuilder = appBuilder.addClass("package.TestClass");

      classBuilder.addVirtualMethod(
          "method1",
          "Ljava/lang/Object;",
          ".limit stack 1",
          ".limit locals 1",
          "aconst_null",
          "areturn");
      classBuilder.addVirtualMethod(
          "method1", "Lpackage/A;", ".limit stack 1", ".limit locals 1", "aconst_null", "areturn");
      classBuilder.addVirtualMethod(
          "method1", "Lpackage/B;", ".limit stack 1", ".limit locals 1", "aconst_null", "areturn");

      classBuilder.addVirtualMethod(
          "method2", "Lpackage/A;", ".limit stack 1", ".limit locals 1", "aconst_null", "areturn");
      classBuilder.addVirtualMethod(
          "method2",
          "Ljava/lang/Object;",
          ".limit stack 1",
          ".limit locals 1",
          "aconst_null",
          "areturn");
      classBuilder.addVirtualMethod(
          "method2", "Lpackage/B;", ".limit stack 1", ".limit locals 1", "aconst_null", "areturn");

      classBuilder.addVirtualMethod(
          "method3", "Lpackage/A;", ".limit stack 1", ".limit locals 1", "aconst_null", "areturn");
      classBuilder.addVirtualMethod(
          "method3", "Lpackage/B;", ".limit stack 1", ".limit locals 1", "aconst_null", "areturn");
      classBuilder.addVirtualMethod(
          "method3",
          "Ljava/lang/Object;",
          ".limit stack 1",
          ".limit locals 1",
          "aconst_null",
          "areturn");

      appBuilder.addInterface("package.A");
      appBuilder.addInterface("package.B");

      Path proguardMapPath = File.createTempFile("mapping", ".txt", temp.getRoot()).toPath();
      AndroidApp output =
          compileWithR8(
              appBuilder.build(),
              keepMainProguardConfiguration("package.TestClass"),
              options -> {
                options.enableTreeShaking = false;
                options.proguardMapConsumer = new FileConsumer(proguardMapPath);
              });

      CodeInspector inspector = new CodeInspector(output, proguardMapPath);
      ClassSubject clazz = inspector.clazz("package.TestClass");
      assertThat(clazz, isPresent());

      Map<String, Set<MethodSubject>> methodSubjectsByName = new HashMap<>();
      for (String name : ImmutableList.of("method1", "method2", "method3")) {
        methodSubjectsByName.put(
            name,
            ImmutableSet.of(
                clazz.method("java.lang.Object", name, ImmutableList.of()),
                clazz.method("package.A", name, ImmutableList.of()),
                clazz.method("package.B", name, ImmutableList.of())));
      }

      Set<String> minifiedMethodNames = new HashSet<>();
      for (Set<MethodSubject> methodSubjects : methodSubjectsByName.values()) {
        for (MethodSubject methodSubject : methodSubjects) {
          assertThat(methodSubject, isRenamed());
          minifiedMethodNames.add(methodSubject.getFinalName());
        }
      }
      assertEquals(3, minifiedMethodNames.size());
    }
  }
}