| // 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.ir.optimize.string; |
| |
| import static org.junit.Assert.assertEquals; |
| 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.MethodSubject; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.Parameterized; |
| |
| @RunWith(Parameterized.class) |
| public class NestedStringBuilderTest extends TestBase { |
| private static final Class<?> MAIN = NestedStringBuilders.class; |
| private static final String EXPECTED = StringUtils.lines("one$two"); |
| |
| @Parameterized.Parameters(name = "{0}") |
| public static TestParametersCollection data() { |
| return getTestParameters().withAllRuntimesAndApiLevels().build(); |
| } |
| |
| private final TestParameters parameters; |
| |
| public NestedStringBuilderTest(TestParameters parameters) { |
| this.parameters = parameters; |
| } |
| |
| @Test |
| public void b113859361() throws Exception { |
| assumeTrue("CF does not rewrite move results.", parameters.isDexRuntime()); |
| |
| testForR8(parameters.getBackend()) |
| .addProgramClasses(MAIN) |
| .addKeepMainRule(MAIN) |
| .setMinApi(parameters.getApiLevel()) |
| .run(parameters.getRuntime(), MAIN.getTypeName(), "$") |
| .assertSuccessWithOutput(EXPECTED) |
| .inspect( |
| codeInspector -> { |
| ClassSubject mainClass = codeInspector.clazz(MAIN); |
| MethodSubject main = mainClass.uniqueMethod(); |
| assertEquals( |
| // TODO(b/113859361): should be 1 after merging StringBuilder's |
| 2, |
| main.streamInstructions() |
| .filter(i -> i.isNewInstance(StringBuilder.class.getTypeName())) |
| .count()); |
| }); |
| } |
| |
| static class NestedStringBuilders { |
| |
| public static void main(String... args) { |
| System.out.println(concat("one", args[0]) + "two"); |
| } |
| |
| public static String concat(String one, String two) { |
| return one + two; |
| } |
| } |
| } |