Test for consistent modality check with implicit and explicit override

Test for KT-20680

compiler/testData/diagnostics/tests/multiplatform/headerClass/modalityCheckForExplicitAndImplicitOverride.kt

@@ -0,0 +1,35 @@
+// !LANGUAGE: +MultiPlatformProjects
+// MODULE: m1-common
+// FILE: common.kt
+
+expect class Foo1 {
+    val x: String
+}
+
+expect class Foo2 {
+    val x: String
+}
+
+expect class Foo3 {
+    val x: String
+}
+
+// MODULE: m2-jvm(m1-common)
+
+// FILE: jvm.kt
+
+open class Open {
+    open val x = "42"
+}
+
+actual open class Foo1 : Open() {
+    override val <!DECLARATION_WITH_INCOMPATIBLE_EXPECT!>x<!> = super.x
+}
+
+actual open class <!NO_ACTUAL_CLASS_MEMBER_FOR_EXPECTED_CLASS!>Foo2<!> : Open()
+
+open class WithFinal {
+    val x = "42"
+}
+
+actual open class Foo3 : WithFinal()

compiler/testData/diagnostics/tests/multiplatform/headerClass/modalityCheckForExplicitAndImplicitOverride.txt

@@ -0,0 +1,67 @@
+// -- Module: <m1-common> --
+package
+
+public final expect class Foo1 {
+    public expect final val x: kotlin.String
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final expect class Foo2 {
+    public expect final val x: kotlin.String
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final expect class Foo3 {
+    public expect final val x: kotlin.String
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+
+// -- Module: <m2-jvm> --
+package
+
+public open actual class Foo1 : Open {
+    public constructor Foo1()
+    public open override /*1*/ val x: kotlin.String
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public open actual class Foo2 : Open {
+    public constructor Foo2()
+    public open override /*1*/ /*fake_override*/ val x: kotlin.String
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public open actual class Foo3 : WithFinal {
+    public constructor Foo3()
+    public final override /*1*/ /*fake_override*/ val x: kotlin.String
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public open class Open {
+    public constructor Open()
+    public open val x: kotlin.String = "42"
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public open class WithFinal {
+    public constructor WithFinal()
+    public final val x: kotlin.String = "42"
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}

compiler/tests/org/jetbrains/kotlin/checkers/DiagnosticsTestGenerated.java

@@ -14199,6 +14199,12 @@ public class DiagnosticsTestGenerated extends AbstractDiagnosticsTest {
                     doTest(fileName);
                 }
 
+                @TestMetadata("modalityCheckForExplicitAndImplicitOverride.kt")
+                public void testModalityCheckForExplicitAndImplicitOverride() throws Exception {
+                    String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/multiplatform/headerClass/modalityCheckForExplicitAndImplicitOverride.kt");
+                    doTest(fileName);
+                }
+
                 @TestMetadata("nestedClasses.kt")
                 public void testNestedClasses() throws Exception {
                     String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/multiplatform/headerClass/nestedClasses.kt");

compiler/tests/org/jetbrains/kotlin/checkers/javac/DiagnosticsUsingJavacTestGenerated.java

@@ -14199,6 +14199,12 @@ public class DiagnosticsUsingJavacTestGenerated extends AbstractDiagnosticsUsing
                     doTest(fileName);
                 }
 
+                @TestMetadata("modalityCheckForExplicitAndImplicitOverride.kt")
+                public void testModalityCheckForExplicitAndImplicitOverride() throws Exception {
+                    String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/multiplatform/headerClass/modalityCheckForExplicitAndImplicitOverride.kt");
+                    doTest(fileName);
+                }
+
                 @TestMetadata("nestedClasses.kt")
                 public void testNestedClasses() throws Exception {
                     String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/multiplatform/headerClass/nestedClasses.kt");