| // Copyright (c) 2022, 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 com.android.tools.r8.ir.optimize.string.utils.StringBuilderCodeMatchers.countStringBuilderAppends; |
| import static com.android.tools.r8.ir.optimize.string.utils.StringBuilderCodeMatchers.countStringBuilderInits; |
| import static com.android.tools.r8.utils.codeinspector.Matchers.isPresent; |
| import static org.hamcrest.MatcherAssert.assertThat; |
| import static org.junit.Assert.assertEquals; |
| |
| import com.android.tools.r8.TestBase; |
| import com.android.tools.r8.TestParameters; |
| import com.android.tools.r8.TestParametersCollection; |
| import com.android.tools.r8.utils.codeinspector.MethodSubject; |
| 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 StringConcatImplicitToStringConcatConstantTest extends TestBase { |
| |
| private static final String EXPECTED = "oko"; |
| |
| @Parameter() public TestParameters parameters; |
| |
| @Parameters(name = "{0}") |
| public static TestParametersCollection data() { |
| return getTestParameters().withAllRuntimesAndApiLevels().build(); |
| } |
| |
| @Test |
| public void testRuntime() throws Exception { |
| testForRuntime(parameters) |
| .addProgramClasses(Main.class) |
| .run(parameters.getRuntime(), Main.class) |
| .assertSuccessWithOutputLines(EXPECTED); |
| } |
| |
| @Test |
| public void testR8() throws Exception { |
| testForR8(parameters.getBackend()) |
| .addProgramClasses(Main.class) |
| .setMinApi(parameters.getApiLevel()) |
| .addKeepMainRule(Main.class) |
| .run(parameters.getRuntime(), Main.class) |
| .assertSuccessWithOutputLines(EXPECTED) |
| .inspect( |
| inspect -> { |
| MethodSubject methodSubject = inspect.clazz(Main.class).mainMethod(); |
| assertThat(methodSubject, isPresent()); |
| assertEquals(0, countStringBuilderInits(methodSubject.asFoundMethodSubject())); |
| assertEquals(0, countStringBuilderAppends(methodSubject.asFoundMethodSubject())); |
| }); |
| } |
| |
| public static class Main { |
| |
| public static void main(String[] args) { |
| String arg1 = System.currentTimeMillis() > 0 ? "o" : ""; |
| System.out.println( |
| new StringBuilder(new StringBuilder(arg1).append("k").append("o")).toString()); |
| } |
| } |
| } |