Treat SEALED_SUBCLASS_FQ_NAME_LIST change as a class signature change

#KT-19580

build-common/src/org/jetbrains/kotlin/incremental/protoDifferenceUtils.kt

@@ -236,7 +236,15 @@ private class DifferenceCalculatorForClass(
                     isClassAffected = true
                 }
                 ProtoBufClassKind.SEALED_SUBCLASS_FQ_NAME_LIST -> {
-                    // TODO
+                    isClassAffected = true
+                    // Subclasses are considered to be affected to fix the case where
+                    // an implementation is added to an nth-level (n > 1) sealed class.
+                    // In case of the following hierarchy:
+                    //     Base <- Intermediate <- Impl
+                    // the change of the SEALED_SUBCLASS_FQ_NAME_LIST will be detected in the Intermediate,
+                    // but there can be usages, that should be rebuilt, without direct references to the Intermediate:
+                    //     when (x as Base) { is Impl -> ... }
+                    areSubclassesAffected = true
                 }
                 ProtoBufClassKind.TYPE_TABLE -> {
                     // TODO

jps-plugin/jps-tests/test/org/jetbrains/kotlin/jps/build/IncrementalJpsTestGenerated.java

@@ -1580,6 +1580,18 @@ public class IncrementalJpsTestGenerated extends AbstractIncrementalJpsTest {
             doTest(fileName);
         }
 
+        @TestMetadata("sealedClassIndirectImplAdded")
+        public void testSealedClassIndirectImplAdded() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/incremental/classHierarchyAffected/sealedClassIndirectImplAdded/");
+            doTest(fileName);
+        }
+
+        @TestMetadata("sealedClassNestedImplAdded")
+        public void testSealedClassNestedImplAdded() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/incremental/classHierarchyAffected/sealedClassNestedImplAdded/");
+            doTest(fileName);
+        }
+
         @TestMetadata("secondaryConstructorAdded")
         public void testSecondaryConstructorAdded() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/incremental/classHierarchyAffected/secondaryConstructorAdded/");

jps-plugin/jps-tests/test/org/jetbrains/kotlin/jps/incremental/JsProtoComparisonTestGenerated.java

@@ -67,6 +67,42 @@ public class JsProtoComparisonTestGenerated extends AbstractJsProtoComparisonTes
             String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/comparison/classSignatureChange/classWithSuperTypeListChanged/");
             doTest(fileName);
         }
+
+        @TestMetadata("nestedClassSignatureChanged")
+        public void testNestedClassSignatureChanged() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/comparison/classSignatureChange/nestedClassSignatureChanged/");
+            doTest(fileName);
+        }
+
+        @TestMetadata("sealedClassImplAdded")
+        public void testSealedClassImplAdded() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/comparison/classSignatureChange/sealedClassImplAdded/");
+            doTest(fileName);
+        }
+
+        @TestMetadata("sealedClassImplRemoved")
+        public void testSealedClassImplRemoved() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/comparison/classSignatureChange/sealedClassImplRemoved/");
+            doTest(fileName);
+        }
+
+        @TestMetadata("sealedClassNestedImplAdded")
+        public void testSealedClassNestedImplAdded() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/comparison/classSignatureChange/sealedClassNestedImplAdded/");
+            doTest(fileName);
+        }
+
+        @TestMetadata("sealedClassNestedImplAddedDeep")
+        public void testSealedClassNestedImplAddedDeep() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/comparison/classSignatureChange/sealedClassNestedImplAddedDeep/");
+            doTest(fileName);
+        }
+
+        @TestMetadata("sealedClassNestedImplRemoved")
+        public void testSealedClassNestedImplRemoved() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/comparison/classSignatureChange/sealedClassNestedImplRemoved/");
+            doTest(fileName);
+        }
     }
 
     @TestMetadata("jps-plugin/testData/comparison/classPrivateOnlyChange")
@@ -158,6 +194,12 @@ public class JsProtoComparisonTestGenerated extends AbstractJsProtoComparisonTes
             doTest(fileName);
         }
 
+        @TestMetadata("nestedClassMembersChanged")
+        public void testNestedClassMembersChanged() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/comparison/classMembersOnlyChanged/nestedClassMembersChanged/");
+            doTest(fileName);
+        }
+
         @TestMetadata("sealedClassImplAdded")
         public void testSealedClassImplAdded() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/comparison/classMembersOnlyChanged/sealedClassImplAdded/");

jps-plugin/jps-tests/test/org/jetbrains/kotlin/jps/incremental/JvmProtoComparisonTestGenerated.java

@@ -67,6 +67,42 @@ public class JvmProtoComparisonTestGenerated extends AbstractJvmProtoComparisonT
             String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/comparison/classSignatureChange/classWithSuperTypeListChanged/");
             doTest(fileName);
         }
+
+        @TestMetadata("nestedClassSignatureChanged")
+        public void testNestedClassSignatureChanged() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/comparison/classSignatureChange/nestedClassSignatureChanged/");
+            doTest(fileName);
+        }
+
+        @TestMetadata("sealedClassImplAdded")
+        public void testSealedClassImplAdded() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/comparison/classSignatureChange/sealedClassImplAdded/");
+            doTest(fileName);
+        }
+
+        @TestMetadata("sealedClassImplRemoved")
+        public void testSealedClassImplRemoved() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/comparison/classSignatureChange/sealedClassImplRemoved/");
+            doTest(fileName);
+        }
+
+        @TestMetadata("sealedClassNestedImplAdded")
+        public void testSealedClassNestedImplAdded() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/comparison/classSignatureChange/sealedClassNestedImplAdded/");
+            doTest(fileName);
+        }
+
+        @TestMetadata("sealedClassNestedImplAddedDeep")
+        public void testSealedClassNestedImplAddedDeep() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/comparison/classSignatureChange/sealedClassNestedImplAddedDeep/");
+            doTest(fileName);
+        }
+
+        @TestMetadata("sealedClassNestedImplRemoved")
+        public void testSealedClassNestedImplRemoved() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/comparison/classSignatureChange/sealedClassNestedImplRemoved/");
+            doTest(fileName);
+        }
     }
 
     @TestMetadata("jps-plugin/testData/comparison/classPrivateOnlyChange")
@@ -158,6 +194,12 @@ public class JvmProtoComparisonTestGenerated extends AbstractJvmProtoComparisonT
             doTest(fileName);
         }
 
+        @TestMetadata("nestedClassMembersChanged")
+        public void testNestedClassMembersChanged() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/comparison/classMembersOnlyChanged/nestedClassMembersChanged/");
+            doTest(fileName);
+        }
+
         @TestMetadata("sealedClassImplAdded")
         public void testSealedClassImplAdded() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/comparison/classMembersOnlyChanged/sealedClassImplAdded/");

jps-plugin/testData/comparison/classMembersOnlyChanged/nestedClassMembersChanged/new.kt

@@ -0,0 +1,9 @@
+package test
+
+class Base {
+    class Nested1 {
+        class Nested2 {
+            fun added() {}
+        }
+    }
+}

jps-plugin/testData/comparison/classMembersOnlyChanged/nestedClassMembersChanged/old.kt

@@ -0,0 +1,9 @@
+package test
+
+class Base {
+    class Nested1 {
+        class Nested2 {
+            fun removed() {}
+        }
+    }
+}

jps-plugin/testData/comparison/classMembersOnlyChanged/nestedClassMembersChanged/result.out

@@ -0,0 +1,3 @@
+PROTO DIFFERENCE in test/Base.Nested1.Nested2: FUNCTION_LIST
+CHANGES in test/Base.Nested1.Nested2: MEMBERS
+    [added, removed]

jps-plugin/testData/comparison/classSignatureChange/nestedClassSignatureChanged/new.kt

@@ -0,0 +1,7 @@
+package test
+
+open class Base {
+    class Nested1 {
+        class Nested2
+    }
+}

jps-plugin/testData/comparison/classSignatureChange/nestedClassSignatureChanged/old.kt

@@ -0,0 +1,7 @@
+package test
+
+open class Base {
+    class Nested1 {
+        class Nested2 : Base()
+    }
+}

jps-plugin/testData/comparison/classSignatureChange/nestedClassSignatureChanged/result.out

@@ -0,0 +1,2 @@
+PROTO DIFFERENCE in test/Base.Nested1.Nested2: SUPERTYPE_LIST
+CHANGES in test/Base.Nested1.Nested2: CLASS_SIGNATURE

jps-plugin/testData/comparison/classSignatureChange/sealedClassImplAdded/new.kt

@@ -0,0 +1,9 @@
+package test
+
+sealed class Base1
+class Impl1 : Base1()
+class Impl11 : Base1()
+
+sealed class Base2
+class Impl2 : Base2()
+class Impl22 : Base2()

jps-plugin/testData/comparison/classSignatureChange/sealedClassImplAdded/old.kt

@@ -0,0 +1,8 @@
+package test
+
+sealed class Base1
+class Impl1 : Base1()
+
+sealed class Base2
+class Impl2 : Base2()
+class Impl22

jps-plugin/testData/comparison/classSignatureChange/sealedClassImplAdded/result.out

@@ -0,0 +1,7 @@
+ADDED test/Impl11
+PROTO DIFFERENCE in test/Base1: SEALED_SUBCLASS_FQ_NAME_LIST
+CHANGES in test/Base1: CLASS_SIGNATURE
+PROTO DIFFERENCE in test/Base2: SEALED_SUBCLASS_FQ_NAME_LIST
+CHANGES in test/Base2: CLASS_SIGNATURE
+PROTO DIFFERENCE in test/Impl22: SUPERTYPE_LIST
+CHANGES in test/Impl22: CLASS_SIGNATURE

jps-plugin/testData/comparison/classSignatureChange/sealedClassImplRemoved/new.kt

@@ -0,0 +1,8 @@
+package test
+
+sealed class Base1
+class Impl1 : Base1()
+
+sealed class Base2
+class Impl2 : Base2()
+class Impl22

jps-plugin/testData/comparison/classSignatureChange/sealedClassImplRemoved/old.kt

@@ -0,0 +1,9 @@
+package test
+
+sealed class Base1
+class Impl1 : Base1()
+class Impl11 : Base1()
+
+sealed class Base2
+class Impl2 : Base2()
+class Impl22 : Base2()

jps-plugin/testData/comparison/classSignatureChange/sealedClassImplRemoved/result.out

@@ -0,0 +1,7 @@
+REMOVED test/Impl11
+PROTO DIFFERENCE in test/Base1: SEALED_SUBCLASS_FQ_NAME_LIST
+CHANGES in test/Base1: CLASS_SIGNATURE
+PROTO DIFFERENCE in test/Base2: SEALED_SUBCLASS_FQ_NAME_LIST
+CHANGES in test/Base2: CLASS_SIGNATURE
+PROTO DIFFERENCE in test/Impl22: SUPERTYPE_LIST
+CHANGES in test/Impl22: CLASS_SIGNATURE

jps-plugin/testData/comparison/classSignatureChange/sealedClassNestedImplAdded/new.kt

@@ -0,0 +1,12 @@
+package test
+
+sealed class Base1 {
+    class Nested1 : Base1()
+    class Nested2 : Base1()
+}
+
+sealed class Base2 {
+    class Nested1 : Base2()
+    class Nested2 : Base2()
+}
+

jps-plugin/testData/comparison/classSignatureChange/sealedClassNestedImplAdded/old.kt

@@ -0,0 +1,11 @@
+package test
+
+sealed class Base1 {
+    class Nested1 : Base1()
+}
+
+sealed class Base2 {
+    class Nested1 : Base2()
+    class Nested2
+}
+

jps-plugin/testData/comparison/classSignatureChange/sealedClassNestedImplAdded/result.out

@@ -0,0 +1,8 @@
+ADDED test/Base1.Nested2
+PROTO DIFFERENCE in test/Base1: NESTED_CLASS_NAME_LIST, SEALED_SUBCLASS_FQ_NAME_LIST
+CHANGES in test/Base1: CLASS_SIGNATURE, MEMBERS
+    [Nested2]
+PROTO DIFFERENCE in test/Base2: SEALED_SUBCLASS_FQ_NAME_LIST
+CHANGES in test/Base2: CLASS_SIGNATURE
+PROTO DIFFERENCE in test/Base2.Nested2: SUPERTYPE_LIST
+CHANGES in test/Base2.Nested2: CLASS_SIGNATURE

jps-plugin/testData/comparison/classSignatureChange/sealedClassNestedImplAddedDeep/new.kt

@@ -0,0 +1,22 @@
+package test
+
+sealed class Base1 {
+    sealed class Nested1 : Base1() {
+        sealed class Nested2 : Nested1() {
+            class Nested3 : Nested2()
+        }
+    }
+}
+
+sealed class Base2 {
+    sealed class Nested1 : Base2() {
+        class Nested2 : Nested1()
+        class Nested3 : Nested1()
+    }
+}
+
+sealed class Base3 {
+    sealed class Nested1 : Base3() {
+        class Nested2 : Nested1()
+    }
+}

jps-plugin/testData/comparison/classSignatureChange/sealedClassNestedImplAddedDeep/old.kt

@@ -0,0 +1,19 @@
+package test
+
+sealed class Base1 {
+    sealed class Nested1 : Base1() {
+        sealed class Nested2 : Nested1()
+    }
+}
+
+sealed class Base2 {
+    sealed class Nested1 : Base2() {
+        class Nested2 : Nested1()
+    }
+}
+
+sealed class Base3 {
+    sealed class Nested1 : Base3() {
+        class Nested2
+    }
+}

jps-plugin/testData/comparison/classSignatureChange/sealedClassNestedImplAddedDeep/result.out

@@ -0,0 +1,12 @@
+ADDED test/Base1.Nested1.Nested2.Nested3
+ADDED test/Base2.Nested1.Nested3
+PROTO DIFFERENCE in test/Base1.Nested1.Nested2: NESTED_CLASS_NAME_LIST, SEALED_SUBCLASS_FQ_NAME_LIST
+CHANGES in test/Base1.Nested1.Nested2: CLASS_SIGNATURE, MEMBERS
+    [Nested3]
+PROTO DIFFERENCE in test/Base2.Nested1: NESTED_CLASS_NAME_LIST, SEALED_SUBCLASS_FQ_NAME_LIST
+CHANGES in test/Base2.Nested1: CLASS_SIGNATURE, MEMBERS
+    [Nested3]
+PROTO DIFFERENCE in test/Base3.Nested1: SEALED_SUBCLASS_FQ_NAME_LIST
+CHANGES in test/Base3.Nested1: CLASS_SIGNATURE
+PROTO DIFFERENCE in test/Base3.Nested1.Nested2: SUPERTYPE_LIST
+CHANGES in test/Base3.Nested1.Nested2: CLASS_SIGNATURE

jps-plugin/testData/comparison/classSignatureChange/sealedClassNestedImplRemoved/new.kt

@@ -0,0 +1,11 @@
+package test
+
+sealed class Base1 {
+    class Nested1 : Base1()
+}
+
+sealed class Base2 {
+    class Nested1 : Base2()
+    class Nested2
+}
+

jps-plugin/testData/comparison/classSignatureChange/sealedClassNestedImplRemoved/old.kt

@@ -0,0 +1,12 @@
+package test
+
+sealed class Base1 {
+    class Nested1 : Base1()
+    class Nested2 : Base1()
+}
+
+sealed class Base2 {
+    class Nested1 : Base2()
+    class Nested2 : Base2()
+}
+

jps-plugin/testData/comparison/classSignatureChange/sealedClassNestedImplRemoved/result.out

@@ -0,0 +1,8 @@
+REMOVED test/Base1.Nested2
+PROTO DIFFERENCE in test/Base1: NESTED_CLASS_NAME_LIST, SEALED_SUBCLASS_FQ_NAME_LIST
+CHANGES in test/Base1: CLASS_SIGNATURE, MEMBERS
+    [Nested2]
+PROTO DIFFERENCE in test/Base2: SEALED_SUBCLASS_FQ_NAME_LIST
+CHANGES in test/Base2: CLASS_SIGNATURE
+PROTO DIFFERENCE in test/Base2.Nested2: SUPERTYPE_LIST
+CHANGES in test/Base2.Nested2: CLASS_SIGNATURE

jps-plugin/testData/incremental/classHierarchyAffected/sealedClassImplAdded/Base.kt

@@ -1,4 +1,4 @@
-sealed class Base {
-    class A : Base()
-    class B : Base()
-}
+sealed class Base
+
+class A : Base()
+class B : Base()

jps-plugin/testData/incremental/classHierarchyAffected/sealedClassImplAdded/Base.kt.new.1

@@ -1,5 +1,5 @@
-sealed class Base {
-    class A : Base()
-    class B : Base()
-    class C : Base()
-}
+sealed class Base
+
+class A : Base()
+class B : Base()
+class C : Base()

jps-plugin/testData/incremental/classHierarchyAffected/sealedClassImplAdded/build.log

@@ -1,8 +1,8 @@
 ================ Step #1 =================
 
 Cleaning output files:
-  out/production/module/Base$A.class
-  out/production/module/Base$B.class
+  out/production/module/A.class
+  out/production/module/B.class
   out/production/module/Base.class
 End of files
 Compiling files:
@@ -27,14 +27,14 @@ COMPILATION FAILED
 ================ Step #2 =================
 
 Cleaning output files:
-  out/production/module/Base$A.class
-  out/production/module/Base$B.class
-  out/production/module/Base$C.class
+  out/production/module/A.class
+  out/production/module/B.class
   out/production/module/Base.class
+  out/production/module/C.class
 End of files
 Compiling files:
   src/Base.kt
   src/use.kt
 End of files
 Exit code: OK
-------------------------------------------
+------------------------------------------

jps-plugin/testData/incremental/classHierarchyAffected/sealedClassImplAdded/use.kt

@@ -1,5 +1,3 @@
-import Base.*
-
 fun use(x: Base): String =
         when (x) {
             is A -> "A"

jps-plugin/testData/incremental/classHierarchyAffected/sealedClassIndirectImplAdded/Base.kt

@@ -0,0 +1,3 @@
+sealed class Base
+sealed class Intermediate : Base()
+class Impl1 : Intermediate()

jps-plugin/testData/incremental/classHierarchyAffected/sealedClassIndirectImplAdded/Base.kt.new.1

@@ -0,0 +1,4 @@
+sealed class Base
+sealed class Intermediate : Base()
+class Impl1 : Intermediate()
+class Impl2 : Intermediate()

jps-plugin/testData/incremental/classHierarchyAffected/sealedClassIndirectImplAdded/build.log

@@ -0,0 +1,40 @@
+================ Step #1 =================
+
+Cleaning output files:
+  out/production/module/Base.class
+  out/production/module/Impl1.class
+  out/production/module/Intermediate.class
+End of files
+Compiling files:
+  src/Base.kt
+End of files
+Marked as dirty by Kotlin:
+  src/use.kt
+Exit code: ADDITIONAL_PASS_REQUIRED
+------------------------------------------
+Cleaning output files:
+  out/production/module/META-INF/module.kotlin_module
+  out/production/module/UseKt.class
+End of files
+Compiling files:
+  src/use.kt
+End of files
+Exit code: ABORT
+------------------------------------------
+COMPILATION FAILED
+'when' expression must be exhaustive, add necessary 'is Impl2' branch or 'else' branch instead
+
+================ Step #2 =================
+
+Cleaning output files:
+  out/production/module/Base.class
+  out/production/module/Impl1.class
+  out/production/module/Impl2.class
+  out/production/module/Intermediate.class
+End of files
+Compiling files:
+  src/Base.kt
+  src/use.kt
+End of files
+Exit code: OK
+------------------------------------------

jps-plugin/testData/incremental/classHierarchyAffected/sealedClassIndirectImplAdded/use.kt

@@ -0,0 +1,4 @@
+fun use(x: Base): Int =
+        when (x) {
+            is Impl1 -> 1
+        }

jps-plugin/testData/incremental/classHierarchyAffected/sealedClassIndirectImplAdded/use.kt.new.2

@@ -0,0 +1,5 @@
+fun use(x: Base): Int =
+        when (x) {
+            is Impl1 -> 1
+            is Impl2 -> 2
+        }

jps-plugin/testData/incremental/classHierarchyAffected/sealedClassNestedImplAdded/Base.kt

@@ -0,0 +1,4 @@
+sealed class Base {
+    class A : Base()
+    class B : Base()
+}

jps-plugin/testData/incremental/classHierarchyAffected/sealedClassNestedImplAdded/Base.kt.new.1

@@ -0,0 +1,5 @@
+sealed class Base {
+    class A : Base()
+    class B : Base()
+    class C : Base()
+}

jps-plugin/testData/incremental/classHierarchyAffected/sealedClassNestedImplAdded/build.log

@@ -0,0 +1,40 @@
+================ Step #1 =================
+
+Cleaning output files:
+  out/production/module/Base$A.class
+  out/production/module/Base$B.class
+  out/production/module/Base.class
+End of files
+Compiling files:
+  src/Base.kt
+End of files
+Marked as dirty by Kotlin:
+  src/use.kt
+Exit code: ADDITIONAL_PASS_REQUIRED
+------------------------------------------
+Cleaning output files:
+  out/production/module/META-INF/module.kotlin_module
+  out/production/module/UseKt.class
+End of files
+Compiling files:
+  src/use.kt
+End of files
+Exit code: ABORT
+------------------------------------------
+COMPILATION FAILED
+'when' expression must be exhaustive, add necessary 'is C' branch or 'else' branch instead
+
+================ Step #2 =================
+
+Cleaning output files:
+  out/production/module/Base$A.class
+  out/production/module/Base$B.class
+  out/production/module/Base$C.class
+  out/production/module/Base.class
+End of files
+Compiling files:
+  src/Base.kt
+  src/use.kt
+End of files
+Exit code: OK
+------------------------------------------

jps-plugin/testData/incremental/classHierarchyAffected/sealedClassNestedImplAdded/use.kt

@@ -0,0 +1,7 @@
+import Base.*
+
+fun use(x: Base): String =
+        when (x) {
+            is A -> "A"
+            is B -> "B"
+        }

jps-plugin/testData/incremental/classHierarchyAffected/sealedClassNestedImplAdded/use.kt.new.2

@@ -0,0 +1,8 @@
+import Base.*
+
+fun use(x: Base): String =
+        when (x) {
+            is A -> "A"
+            is B -> "B"
+            is C -> "C"
+        }