| // 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.ir.optimize.uninstantiatedtypes; |
| |
| import static com.android.tools.r8.utils.codeinspector.Matchers.isPresent; |
| import static org.hamcrest.MatcherAssert.assertThat; |
| |
| import com.android.tools.r8.NeverInline; |
| import com.android.tools.r8.TestBase; |
| import com.android.tools.r8.TestParameters; |
| import com.android.tools.r8.TestParametersBuilder; |
| 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.Parameters; |
| |
| /** |
| * Tests that the interface {@link CustomSupplier}, which is only instantiated (indirectly) via a |
| * lambda, is not considered to be uninstantiated. |
| */ |
| @RunWith(Parameterized.class) |
| public class LambdaInstantiatedTypeTest extends TestBase { |
| |
| private final TestParameters parameters; |
| |
| @Parameters(name = "{0}") |
| public static TestParametersCollection data() { |
| return TestParametersBuilder.builder().withAllRuntimesAndApiLevels().build(); |
| } |
| |
| public LambdaInstantiatedTypeTest(TestParameters parameters) { |
| this.parameters = parameters; |
| } |
| |
| String expected = StringUtils.joinLines("In TestClass.live()"); |
| |
| @Test |
| public void testReference() throws Exception { |
| testForRuntime(parameters) |
| .addInnerClasses(LambdaInstantiatedTypeTest.class) |
| .run(parameters.getRuntime(), TestClass.class) |
| .assertSuccessWithOutput(expected); |
| } |
| |
| @Test |
| public void test() throws Exception { |
| CodeInspector inspector = |
| testForR8(parameters.getBackend()) |
| .addInnerClasses(LambdaInstantiatedTypeTest.class) |
| .addKeepMainRule(TestClass.class) |
| .enableInliningAnnotations() |
| .setMinApi(parameters.getApiLevel()) |
| .run(parameters.getRuntime(), TestClass.class) |
| .assertSuccessWithOutput(expected) |
| .inspector(); |
| |
| ClassSubject classSubject = inspector.clazz(TestClass.class); |
| assertThat(classSubject, isPresent()); |
| |
| // Check that the method live() has not been removed. |
| assertThat(classSubject.uniqueMethodWithName("live"), isPresent()); |
| } |
| |
| static class TestClass { |
| |
| public static void main(String[] args) { |
| testNoRewriteToThrowNull(); |
| } |
| |
| @NeverInline |
| private static void testNoRewriteToThrowNull() { |
| // Should not be rewritten to "throw null". |
| A.create(); |
| live(); |
| } |
| |
| @NeverInline |
| private static void live() { |
| System.out.print("In TestClass.live()"); |
| } |
| } |
| |
| static class A { |
| |
| private static final CustomSupplier<A> factory = A::new; |
| |
| @NeverInline |
| public static A create() { |
| // Should not be rewritten to throw null since CustomSupplier<A> is instantiated by a lambda. |
| return factory.get(); |
| } |
| } |
| |
| interface CustomSupplier<T> { |
| |
| T get(); |
| } |
| } |