Add test for pruning generic signature with allowshrinking
Bug: 189443104
Change-Id: I2e31d53fbae6232712b19b948e7388a9e5006a4c
diff --git a/src/test/java/com/android/tools/r8/graph/genericsignature/GenericSignatureAllowShrinkingTest.java b/src/test/java/com/android/tools/r8/graph/genericsignature/GenericSignatureAllowShrinkingTest.java
new file mode 100644
index 0000000..46e1a82
--- /dev/null
+++ b/src/test/java/com/android/tools/r8/graph/genericsignature/GenericSignatureAllowShrinkingTest.java
@@ -0,0 +1,102 @@
+// Copyright (c) 2021, 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.graph.genericsignature;
+
+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.shaking.ProguardKeepAttributes;
+import com.android.tools.r8.utils.codeinspector.ClassSubject;
+import com.android.tools.r8.utils.codeinspector.CodeInspector;
+import java.lang.reflect.ParameterizedType;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import org.junit.runners.Parameterized.Parameters;
+
+@RunWith(Parameterized.class)
+// This is a reproduction of b/189443104.
+public class GenericSignatureAllowShrinkingTest extends TestBase {
+
+ private final TestParameters parameters;
+ private final String[] EXPECTED = new String[] {"class java.lang.String"};
+
+ @Parameters(name = "{0}")
+ public static TestParametersCollection data() {
+ return getTestParameters().withAllRuntimesAndApiLevels().build();
+ }
+
+ public GenericSignatureAllowShrinkingTest(TestParameters parameters) {
+ this.parameters = parameters;
+ }
+
+ @Test
+ public void testR8WithDirectKeep() throws Exception {
+ testForR8(parameters.getBackend())
+ .addInnerClasses(getClass())
+ .setMinApi(parameters.getApiLevel())
+ .addKeepClassRules(Foo.class)
+ .addKeepRules("-keep class * extends " + Foo.class.getTypeName() + " { *; }")
+ .addKeepAttributes(ProguardKeepAttributes.SIGNATURE)
+ .addKeepMainRule(Main.class)
+ .run(parameters.getRuntime(), Main.class)
+ .inspect(inspector -> inspect(inspector, true))
+ .assertSuccessWithOutputLines(EXPECTED);
+ }
+
+ @Test
+ public void testR8AllowShrinking() throws Exception {
+ testForR8(parameters.getBackend())
+ .addInnerClasses(getClass())
+ .setMinApi(parameters.getApiLevel())
+ .addKeepRules("-keep,allowshrinking class " + Foo.class.getTypeName() + " { *; }")
+ .addKeepRules(
+ "-keep,allowshrinking,allowobfuscation class * extends "
+ + Foo.class.getTypeName()
+ + " { *; }")
+ .addKeepAttributes(ProguardKeepAttributes.SIGNATURE)
+ .addKeepMainRule(Main.class)
+ .compile()
+ // TODO(b/189443104): Should keep signature.
+ .inspect(inspector -> inspect(inspector, false))
+ .run(parameters.getRuntime(), Main.class)
+ // TODO(b/189443104): Should succeed.
+ .assertFailureWithErrorThatThrows(ClassCastException.class);
+ }
+
+ private void inspect(CodeInspector inspector, boolean keptSignature) {
+ ClassSubject foo = inspector.clazz(Foo.class);
+ assertThat(foo, isPresent());
+ assertEquals(
+ keptSignature ? "<T:Ljava/lang/Object;>Ljava/lang/Object;" : null,
+ foo.getFinalSignatureAttribute());
+
+ ClassSubject main$1 = inspector.clazz(Main.class.getTypeName() + "$1");
+ assertThat(main$1, isPresent());
+ assertEquals(
+ keptSignature ? "L" + binaryName(Foo.class) + "<Ljava/lang/String;>;" : null,
+ main$1.getFinalSignatureAttribute());
+ }
+
+ public static class Foo<T> {
+
+ public void print() {
+ ParameterizedType genericSuperclass =
+ (ParameterizedType) this.getClass().getGenericSuperclass();
+ System.out.println(genericSuperclass.getActualTypeArguments()[0].toString());
+ }
+ }
+
+ public static class Main {
+
+ public static void main(String[] args) {
+ (new Foo<String>() {}).print();
+ }
+ }
+}
