Add test for reflectively looking up type parameters in inner class
Bug: 184927364
Change-Id: I1f9ca761d8865264c0e6bb507a17556f73ce14c6
diff --git a/src/test/java/com/android/tools/r8/graph/genericsignature/GenericSignatureReflectiveInnerTest.java b/src/test/java/com/android/tools/r8/graph/genericsignature/GenericSignatureReflectiveInnerTest.java
new file mode 100644
index 0000000..0908f05
--- /dev/null
+++ b/src/test/java/com/android/tools/r8/graph/genericsignature/GenericSignatureReflectiveInnerTest.java
@@ -0,0 +1,86 @@
+// 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.CoreMatchers.not;
+import static org.hamcrest.MatcherAssert.assertThat;
+
+import com.android.tools.r8.TestBase;
+import com.android.tools.r8.TestParameters;
+import com.android.tools.r8.TestParametersCollection;
+import java.lang.reflect.TypeVariable;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import org.junit.runners.Parameterized.Parameters;
+
+@RunWith(Parameterized.class)
+public class GenericSignatureReflectiveInnerTest extends TestBase {
+
+ private final String EXPECTED = "S";
+
+ private final TestParameters parameters;
+
+ @Parameters(name = "{0}")
+ public static TestParametersCollection data() {
+ return getTestParameters().withAllRuntimesAndApiLevels().build();
+ }
+
+ public GenericSignatureReflectiveInnerTest(TestParameters parameters) {
+ this.parameters = parameters;
+ }
+
+ @Test
+ public void testRuntime() throws Exception {
+ testForRuntime(parameters)
+ .addInnerClasses(getClass())
+ .run(parameters.getRuntime(), Main.class)
+ .assertSuccessWithOutputLines(EXPECTED);
+ }
+
+ @Test
+ public void testR8() throws Exception {
+ testForR8(parameters.getBackend())
+ .addInnerClasses(getClass())
+ .addKeepMainRule(Main.class)
+ .addKeepAttributeInnerClassesAndEnclosingMethod()
+ .addKeepAttributeSignature()
+ .setMinApi(parameters.getApiLevel())
+ .run(parameters.getRuntime(), Main.class)
+ .assertSuccessWithOutputLines(EXPECTED)
+ .inspect(
+ inspector -> {
+ assertThat(inspector.clazz(Foo.class), not(isPresent()));
+ assertThat(inspector.clazz(Foo.Bar.class), isPresent());
+ });
+ }
+
+ public static class Foo<T> {
+
+ public class Bar<S> {
+
+ public void test() {
+ Class<? extends Bar> aClass = (Class<? extends Bar>) this.getClass();
+ for (TypeVariable<? extends Class<? extends Bar>> typeParameter :
+ aClass.getTypeParameters()) {
+ System.out.println(typeParameter);
+ }
+ }
+ }
+
+ public Bar<String> foo() {
+ return new Bar<>();
+ }
+ }
+
+ public static class Main {
+
+ public static void main(String[] args) {
+ Foo<Integer>.Bar<String> foo = new Foo<Integer>().foo();
+ foo.test();
+ }
+ }
+}
