| // Copyright (c) 2020, 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 com.android.tools.r8.TestBase; |
| import com.android.tools.r8.TestParameters; |
| import com.android.tools.r8.TestParametersCollection; |
| import com.android.tools.r8.ToolHelper.DexVm.Version; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.Parameterized; |
| |
| @RunWith(Parameterized.class) |
| public class UnusedStringBuilderFromCharSequenceWithAppendObjectTest extends TestBase { |
| |
| private final TestParameters parameters; |
| |
| @Parameterized.Parameters(name = "{0}") |
| public static TestParametersCollection data() { |
| return getTestParameters().withAllRuntimesAndApiLevels().build(); |
| } |
| |
| public UnusedStringBuilderFromCharSequenceWithAppendObjectTest(TestParameters parameters) { |
| this.parameters = parameters; |
| } |
| |
| @Test |
| public void test() throws Exception { |
| testForR8(parameters.getBackend()) |
| .addInnerClasses(getClass()) |
| .addKeepMainRule(Main.class) |
| .setMinApi(parameters.getApiLevel()) |
| .compile() |
| .run(parameters.getRuntime(), Main.class) |
| .assertSuccessWithOutputLinesIf( |
| parameters.isCfRuntime() |
| || parameters.getDexRuntimeVersion().isNewerThanOrEqual(Version.V7_0_0), |
| "CustomCharSequence.length()", |
| "CustomCharSequence.length()", |
| "CustomCharSequence.length()", |
| "CustomCharSequence.charAt(0)") |
| .assertSuccessWithOutputLinesIf( |
| parameters.isDexRuntime() |
| && parameters.getDexRuntimeVersion().isOlderThan(Version.V7_0_0), |
| "CustomCharSequence.toString()"); |
| } |
| |
| static class Main { |
| |
| public static void main(String[] args) { |
| new StringBuilder(new CustomCharSequence()); |
| } |
| } |
| |
| static class CustomCharSequence implements CharSequence { |
| |
| @Override |
| public int length() { |
| System.out.println("CustomCharSequence.length()"); |
| return 1; |
| } |
| |
| @Override |
| public char charAt(int i) { |
| if (i != 0) { |
| throw new RuntimeException(); |
| } |
| System.out.println("CustomCharSequence.charAt(0)"); |
| return 'A'; |
| } |
| |
| @Override |
| public CharSequence subSequence(int i, int i1) { |
| throw new RuntimeException(); |
| } |
| |
| @Override |
| public String toString() { |
| System.out.println("CustomCharSequence.toString()"); |
| return "A"; |
| } |
| } |
| } |