| // 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.string; |
| |
| import static com.android.tools.r8.utils.codeinspector.Matchers.isPresent; |
| import static org.hamcrest.MatcherAssert.assertThat; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assume.assumeTrue; |
| |
| import com.android.tools.r8.D8TestRunResult; |
| import com.android.tools.r8.NeverInline; |
| import com.android.tools.r8.R8TestRunResult; |
| import com.android.tools.r8.TestBase; |
| import com.android.tools.r8.TestParameters; |
| import com.android.tools.r8.TestParametersCollection; |
| import com.android.tools.r8.TestRunResult; |
| import com.android.tools.r8.utils.InternalOptions; |
| import com.android.tools.r8.utils.StringUtils; |
| import com.android.tools.r8.utils.codeinspector.ClassSubject; |
| import com.android.tools.r8.utils.codeinspector.CodeInspector; |
| 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 StringIsEmptyTest extends TestBase { |
| private static final String JAVA_OUTPUT = StringUtils.lines( |
| "false", |
| "true", |
| "false", |
| "false" |
| ); |
| private static final Class<?> MAIN = TestClass.class; |
| |
| @Parameterized.Parameters(name = "{0}") |
| public static TestParametersCollection data() { |
| return getTestParameters().withAllRuntimesAndApiLevels().build(); |
| } |
| |
| private final TestParameters parameters; |
| |
| public StringIsEmptyTest(TestParameters parameters) { |
| this.parameters = parameters; |
| } |
| |
| @Test |
| public void testJVMOutput() throws Exception { |
| assumeTrue("Only run JVM reference on CF runtimes", parameters.isCfRuntime()); |
| testForJvm() |
| .addTestClasspath() |
| .run(parameters.getRuntime(), MAIN) |
| .assertSuccessWithOutput(JAVA_OUTPUT); |
| } |
| |
| private void configure(InternalOptions options) { |
| // This test wants to check if compile-time computation is not applied to non-null, |
| // non-constant value. In a simple test setting, call-site optimization knows the argument is |
| // always a non-null, specific constant, but that is beyond the scope of this test. |
| options.enablePropagationOfConstantsAtCallSites = false; |
| } |
| |
| private void test(TestRunResult result, int expectedStringIsEmptyCount) throws Exception { |
| CodeInspector codeInspector = result.inspector(); |
| ClassSubject mainClass = codeInspector.clazz(MAIN); |
| MethodSubject mainMethod = mainClass.mainMethod(); |
| assertThat(mainMethod, isPresent()); |
| assertEquals(expectedStringIsEmptyCount, countCall(mainMethod, "String", "isEmpty")); |
| |
| MethodSubject wrapper = mainClass.uniqueMethodWithName("wrapper"); |
| assertThat(wrapper, isPresent()); |
| // Due to nullable, non-constant argument (w/o call-site optimization), isEmpty() should remain. |
| assertEquals(1, countCall(wrapper, "String", "isEmpty")); |
| } |
| |
| @Test |
| public void testD8() throws Exception { |
| assumeTrue("Only run D8 for Dex backend", parameters.isDexRuntime()); |
| |
| D8TestRunResult result = |
| testForD8() |
| .debug() |
| .addProgramClasses(MAIN) |
| .setMinApi(parameters.getApiLevel()) |
| .addOptionsModification(this::configure) |
| .run(parameters.getRuntime(), MAIN) |
| .assertSuccessWithOutput(JAVA_OUTPUT); |
| test(result, 3); |
| |
| result = |
| testForD8() |
| .release() |
| .addProgramClasses(MAIN) |
| .setMinApi(parameters.getApiLevel()) |
| .addOptionsModification(this::configure) |
| .run(parameters.getRuntime(), MAIN) |
| .assertSuccessWithOutput(JAVA_OUTPUT); |
| test(result, 1); |
| } |
| |
| @Test |
| public void testR8() throws Exception { |
| R8TestRunResult result = |
| testForR8(parameters.getBackend()) |
| .addProgramClasses(MAIN) |
| .enableProguardTestOptions() |
| .enableInliningAnnotations() |
| .addKeepMainRule(MAIN) |
| .setMinApi(parameters.getApiLevel()) |
| .addOptionsModification(this::configure) |
| .run(parameters.getRuntime(), MAIN) |
| .assertSuccessWithOutput(JAVA_OUTPUT); |
| test(result, 1); |
| } |
| |
| static class TestClass { |
| |
| @NeverInline |
| static boolean wrapper(String arg) { |
| // Cannot be computed at compile time (unless call-site optimization is enabled). |
| return arg.isEmpty(); |
| } |
| |
| public static void main(String[] args) { |
| String s1 = "non-empty"; |
| System.out.println(s1.isEmpty()); |
| String s2 = ""; |
| System.out.println(s2.isEmpty()); |
| System.out.println((s1 + s2).isEmpty()); |
| System.out.println(wrapper("non-null")); |
| try { |
| wrapper(null); |
| throw new AssertionError("Should raise NullPointerException"); |
| } catch (NullPointerException npe) { |
| // expected |
| } |
| } |
| } |
| |
| } |