1 files changed, 96 insertions, 0 deletions
diff --git a/test-utils/src/main/kotlin/com/google/devtools/ksp/processor/ReferenceElementProcessor.kt b/test-utils/src/main/kotlin/com/google/devtools/ksp/processor/ReferenceElementProcessor.kt
new file mode 100644
index 00000000..c0843f36
--- /dev/null
+++ b/test-utils/src/main/kotlin/com/google/devtools/ksp/processor/ReferenceElementProcessor.kt
@@ -0,0 +1,96 @@
+/*
+ * Copyright 2020 Google LLC
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ *
+ * 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 com.google.devtools.ksp.processor
+
+import com.google.devtools.ksp.getPropertyDeclarationByName
+import com.google.devtools.ksp.processing.Resolver
+import com.google.devtools.ksp.symbol.*
+import com.google.devtools.ksp.visitor.KSTopDownVisitor
+
+open class ReferenceElementProcessor : AbstractTestProcessor() {
+    val results = mutableListOf<String>()
+    val collector = ReferenceCollector()
+    val references = mutableSetOf<KSTypeReference>()
+
+    override fun process(resolver: Resolver): List<KSAnnotated> {
+        val files = resolver.getNewFiles()
+
+        files.forEach {
+            it.accept(collector, references)
+        }
+
+        resolver.getPropertyDeclarationByName("z", true)!!.accept(collector, references)
+        resolver.getPropertyDeclarationByName("w", true)!!.accept(collector, references)
+
+        fun refName(it: KSTypeReference) = (it.element as KSClassifierReference).referencedName()
+
+        val sortedReferences =
+            references.filter { it.element is KSClassifierReference && it.origin == Origin.KOTLIN }.sortedBy(::refName)
+        for (i in sortedReferences)
+            results.add(
+                "KSClassifierReferenceImpl: Qualifier of ${i.element} is ${
+                (i.element as KSClassifierReference).qualifier
+                }"
+            )
+
+        // FIXME: References in getters and type arguments are not compared to equal.
+        val descriptorReferences =
+            references.filter { it.element is KSClassifierReference && it.origin == Origin.KOTLIN_LIB }
+                .distinctBy(::refName).sortedBy(::refName)
+        for (i in descriptorReferences) {
+            results.add(
+                "KSClassifierReferenceDescriptorImpl: Qualifier of ${i.element} is ${
+                (i.element as KSClassifierReference).qualifier
+                }"
+            )
+        }
+
+        val defNonNullReferences =
+            references.filter { it.element is KSDefNonNullReference && it.origin == Origin.KOTLIN }
+                .sortedBy { it.toString() }
+
+        defNonNullReferences.forEach {
+            results.add(
+                "KSDefNonNullReferenceImpl: Enclosed type of ${(it.element as KSDefNonNullReference).enclosedType}"
+            )
+        }
+
+        val javaReferences = references.filter { it.element is KSClassifierReference && it.origin == Origin.JAVA }
+            .sortedBy(::refName)
+        for (i in javaReferences) {
+            results.add(
+                "KSClassifierReferenceJavaImpl: Qualifier of ${i.element} is ${
+                (i.element as KSClassifierReference).qualifier}"
+            )
+        }
+        return emptyList()
+    }
+
+    override fun toResult(): List<String> {
+        return results
+    }
+}
+
+class ReferenceCollector : KSTopDownVisitor<MutableSet<KSTypeReference>, Unit>() {
+    override fun defaultHandler(node: KSNode, data: MutableSet<KSTypeReference>) = Unit
+
+    override fun visitTypeReference(typeReference: KSTypeReference, data: MutableSet<KSTypeReference>) {
+        super.visitTypeReference(typeReference, data)
+        data.add(typeReference)
+    }
+}