Add test for incorrect handling of Record.Signature attribute (#28)

docs/md/releasenotes.md

@@ -11,6 +11,7 @@
 - Make the `DominatorCalculator` skip methods with an empty `CodeAttribute`.
 - Prevent updating Kotlin function names with mangled JVM method names in `ClassReferenceFixer`. (`PGD-208`)
 - Initialize Kotlin default implementation classes of annotation classes correctly in `ClassReferenceInitializer`.
+- Correctly initialize Java Record component attributes in `ClassReferenceInitializer`. (`PGC-28`, `PGD-194`)
 
 ### API changes
 

src/test/kotlin/proguard/classfile/util/ClassReferenceInitializerJavaRecordTest.kt

@@ -0,0 +1,95 @@
+/*
+ * ProGuardCORE -- library to process Java bytecode.
+ *
+ * Copyright (c) 2002-2022 Guardsquare NV
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package proguard.classfile.util
+
+import io.kotest.core.spec.style.FreeSpec
+import io.kotest.matchers.shouldBe
+import io.kotest.matchers.shouldNotBe
+import io.mockk.spyk
+import io.mockk.verify
+import proguard.classfile.attribute.RecordComponentInfo
+import testutils.ClassPoolBuilder
+import testutils.JavaSource
+import testutils.RequiresJavaVersion
+
+@RequiresJavaVersion(15)
+class ClassReferenceInitializerJavaRecordTest : FreeSpec({
+    "Given a Java record class with a signature attribute" - {
+        val (programClassPool, libraryClassPool) = ClassPoolBuilder.fromSource(
+            JavaSource(
+                "Record.java",
+                """
+                public record Record<K>(Key<K> key) {}
+                """.trimIndent()
+            ),
+            JavaSource(
+                "Key.java",
+                """
+                public interface Key<T> {}
+                """.trimIndent()
+            ),
+            initialize = false,
+            javacArguments = if (testutils.currentJavaVersion == 15)
+                listOf("--enable-preview", "--release", "15") else emptyList()
+        )
+
+        val recordClazz = programClassPool.getClass("Record")
+
+        "Then the record class should not be null" {
+            recordClazz shouldNotBe null
+        }
+
+        "Then initializing should visit the signature attributes correctly" {
+            val initializer = spyk(ClassReferenceInitializer(programClassPool, libraryClassPool))
+
+            programClassPool.classesAccept(initializer)
+
+            verify(exactly = 1) {
+                // The class attribute should be visited.
+                initializer.visitSignatureAttribute(
+                    recordClazz,
+                    withArg {
+                        it.getSignature(recordClazz) shouldBe "<K:Ljava/lang/Object;>Ljava/lang/Record;"
+                    }
+                )
+
+                // The record component attribute should be visited.
+                initializer.visitSignatureAttribute(
+                    recordClazz,
+                    ofType<RecordComponentInfo>(),
+                    withArg {
+                        it.getSignature(recordClazz) shouldBe "LKey<TK;>;"
+                    }
+                )
+            }
+
+            verify(exactly = 0) {
+                // The record component attribute should not be visited as generic attribute.
+                // This happens if the ClassReferenceInitializer does not override
+                // the RecordComponentInfo specific method.
+                initializer.visitSignatureAttribute(
+                    recordClazz,
+                    withArg {
+                        it.getSignature(recordClazz) shouldBe "LKey<TK;>;"
+                    }
+                )
+            }
+        }
+    }
+})