src/test/java/com/android/tools/r8/apimodel/ApiModelNoDesugaredLibraryReferenceTest.java

// 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.apimodel;

import static com.android.tools.r8.apimodel.ApiModelingTestHelper.verifyThat;
import static org.junit.Assert.assertEquals;

import com.android.tools.r8.TestParameters;
import com.android.tools.r8.ToolHelper.DexVm.Version;
import com.android.tools.r8.desugar.desugaredlibrary.DesugaredLibraryTestBase;
import com.android.tools.r8.references.Reference;
import com.android.tools.r8.utils.AndroidApiLevel;
import java.lang.reflect.Method;
import java.nio.file.Paths;
import java.util.List;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;

@RunWith(Parameterized.class)
public class ApiModelNoDesugaredLibraryReferenceTest extends DesugaredLibraryTestBase {

  private final TestParameters parameters;

  @Parameters(name = "{0}")
  public static List<Object[]> data() {
    return buildParameters(getTestParameters().withDexRuntimes().withAllApiLevels().build());
  }

  public ApiModelNoDesugaredLibraryReferenceTest(TestParameters parameters) {
    this.parameters = parameters;
  }

  @Test
  public void testR8() throws Exception {
    KeepRuleConsumer keepRuleConsumer = createKeepRuleConsumer(parameters);
    Method printZone = LibUser.class.getDeclaredMethod("printPath");
    Method main = Executor.class.getDeclaredMethod("main", String[].class);
    testForR8(parameters.getBackend())
        .addProgramClasses(Executor.class, LibUser.class)
        .addLibraryFiles(getLibraryFile())
        .addKeepMainRule(Executor.class)
        .setMinApi(parameters.getApiLevel())
        .enableCoreLibraryDesugaring(parameters.getApiLevel(), keepRuleConsumer)
        .apply(ApiModelingTestHelper::enableApiCallerIdentification)
        // We are testing that we do not inline/merge higher api-levels
        .apply(ApiModelingTestHelper::disableOutliningAndStubbing)
        .apply(
            ApiModelingTestHelper.addTracedApiReferenceLevelCallBack(
                (reference, apiLevel) -> {
                  if (reference.equals(Reference.methodFromMethod(printZone))) {
                    assertEquals(AndroidApiLevel.O.max(parameters.getApiLevel()), apiLevel);
                  }
                }))
        .compile()
        .addDesugaredCoreLibraryRunClassPath(
            this::buildDesugaredLibrary, parameters.getApiLevel(), keepRuleConsumer.get(), false)
        .run(parameters.getRuntime(), Executor.class)
        .applyIf(
            parameters.getDexRuntimeVersion().isDalvik(),
            result -> result.assertSuccessWithOutputLines("java.nio.file.Paths"))
        .applyIf(
            parameters.getDexRuntimeVersion().isInRangeInclusive(Version.V5_1_1, Version.V7_0_0),
            result ->
                result.assertSuccessWithOutputLines("Failed resolution of: Ljava/nio/file/Paths;"))
        .applyIf(
            parameters.getDexRuntimeVersion().isNewerThan(Version.V7_0_0),
            result -> result.assertSuccessWithOutputLines("~"))
        .inspect(
            inspector -> {
              verifyThat(inspector, parameters, printZone)
                  .inlinedIntoFromApiLevel(main, AndroidApiLevel.O);
            });
  }

  static class Executor {

    public static void main(String[] args) {
      try {
        LibUser.printPath();
      } catch (Throwable t) {
        System.out.println(t.getMessage());
      }
    }
  }

  static class LibUser {

    public static void printPath() {
      // java.nio.Path is not (yet) library desugared.
      System.out.println(Paths.get("~"));
    }
  }
}