K2: add test for KT-56520, case (7), qualifier receivers (4.1)

This commit covers enum entry vs companion member case,
when one companion object is in the scope.
K1 reports UNRESOLVED_REFERENCE here, probably due to ambiguity.
About K2, while resolving Some.foo it first tries to resolve Some
as a "general" variable access, and gets the only candidate with companion.
After that it tries to resolve Some as a qualifier,
but we have no scope with a single qualifier, so no influence here.
Finally during foo resolve it should choose between enum entry and
companion member, and enum entry wins due to KT-37591.

analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosticCompilerTestFE10TestdataTestGenerated.java

@@ -44791,6 +44791,12 @@ public class DiagnosticCompilerTestFE10TestdataTestGenerated extends AbstractDia
                     runTest("compiler/testData/diagnostics/testsWithStdLib/resolve/ambiguousTypeReferences/constructorCaseSpace.kt");
                 }
 
+                @Test
+                @TestMetadata("qualifierEnumEntryOrCompanionMemberCase.kt")
+                public void testQualifierEnumEntryOrCompanionMemberCase() throws Exception {
+                    runTest("compiler/testData/diagnostics/testsWithStdLib/resolve/ambiguousTypeReferences/qualifierEnumEntryOrCompanionMemberCase.kt");
+                }
+
                 @Test
                 @TestMetadata("qualifierForStaticCase.kt")
                 public void testQualifierForStaticCase() throws Exception {

analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/LLFirPreresolvedReversedDiagnosticCompilerFE10TestDataTestGenerated.java

@@ -44791,6 +44791,12 @@ public class LLFirPreresolvedReversedDiagnosticCompilerFE10TestDataTestGenerated
                     runTest("compiler/testData/diagnostics/testsWithStdLib/resolve/ambiguousTypeReferences/constructorCaseSpace.kt");
                 }
 
+                @Test
+                @TestMetadata("qualifierEnumEntryOrCompanionMemberCase.kt")
+                public void testQualifierEnumEntryOrCompanionMemberCase() throws Exception {
+                    runTest("compiler/testData/diagnostics/testsWithStdLib/resolve/ambiguousTypeReferences/qualifierEnumEntryOrCompanionMemberCase.kt");
+                }
+
                 @Test
                 @TestMetadata("qualifierForStaticCase.kt")
                 public void testQualifierForStaticCase() throws Exception {

compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirLightTreeOldFrontendDiagnosticsTestGenerated.java

@@ -42669,6 +42669,12 @@ public class FirLightTreeOldFrontendDiagnosticsTestGenerated extends AbstractFir
                     runTest("compiler/testData/diagnostics/testsWithStdLib/resolve/ambiguousTypeReferences/constructorCaseSpace.kt");
                 }
 
+                @Test
+                @TestMetadata("qualifierEnumEntryOrCompanionMemberCase.kt")
+                public void testQualifierEnumEntryOrCompanionMemberCase() throws Exception {
+                    runTest("compiler/testData/diagnostics/testsWithStdLib/resolve/ambiguousTypeReferences/qualifierEnumEntryOrCompanionMemberCase.kt");
+                }
+
                 @Test
                 @TestMetadata("qualifierForStaticCase.kt")
                 public void testQualifierForStaticCase() throws Exception {

compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirPsiOldFrontendDiagnosticsTestGenerated.java

@@ -42789,6 +42789,12 @@ public class FirPsiOldFrontendDiagnosticsTestGenerated extends AbstractFirPsiDia
                     runTest("compiler/testData/diagnostics/testsWithStdLib/resolve/ambiguousTypeReferences/constructorCaseSpace.kt");
                 }
 
+                @Test
+                @TestMetadata("qualifierEnumEntryOrCompanionMemberCase.kt")
+                public void testQualifierEnumEntryOrCompanionMemberCase() throws Exception {
+                    runTest("compiler/testData/diagnostics/testsWithStdLib/resolve/ambiguousTypeReferences/qualifierEnumEntryOrCompanionMemberCase.kt");
+                }
+
                 @Test
                 @TestMetadata("qualifierForStaticCase.kt")
                 public void testQualifierForStaticCase() throws Exception {

compiler/testData/diagnostics/testsWithStdLib/resolve/ambiguousTypeReferences/qualifierEnumEntryOrCompanionMemberCase.fir.kt

@@ -0,0 +1,36 @@
+// ISSUE: KT-56520 (case 7, enum entry vs companion member, one companion in scope)
+// FIR_DUMP
+
+// FILE: some/Some.kt
+package some
+
+enum class Some {
+    foo; // (1)
+
+    // companion object {}
+}
+
+// FILE: some2/Some.kt
+package some2
+
+enum class Some {
+    foo; // (2)
+
+    companion object {
+        val foo = "2'" // (2')
+    }
+}
+
+// FILE: some3/Some.java
+package some3;
+
+public enum Some {
+    foo; // (3)
+}
+
+// FILE: main.kt
+import some.*
+import some2.*
+import some3.*
+
+fun test() = Some.foo

compiler/testData/diagnostics/testsWithStdLib/resolve/ambiguousTypeReferences/qualifierEnumEntryOrCompanionMemberCase.fir.txt

@@ -0,0 +1,52 @@
+FILE: Some.kt
+    package some
+
+    public final enum class Some : R|kotlin/Enum<some/Some>| {
+        private constructor(): R|some/Some| {
+            super<R|kotlin/Enum<some/Some>|>()
+        }
+
+        public final static enum entry foo: R|some/Some|
+        public final static fun values(): R|kotlin/Array<some/Some>| {
+        }
+
+        public final static fun valueOf(value: R|kotlin/String|): R|some/Some| {
+        }
+
+        public final static val entries: R|kotlin/enums/EnumEntries<some/Some>|
+            public get(): R|kotlin/enums/EnumEntries<some/Some>|
+
+    }
+FILE: Some.kt
+    package some2
+
+    public final enum class Some : R|kotlin/Enum<some2/Some>| {
+        private constructor(): R|some2/Some| {
+            super<R|kotlin/Enum<some2/Some>|>()
+        }
+
+        public final static enum entry foo: R|some2/Some|
+        public final companion object Companion : R|kotlin/Any| {
+            private constructor(): R|some2/Some.Companion| {
+                super<R|kotlin/Any|>()
+            }
+
+            public final val foo: R|kotlin/String| = String(2')
+                public get(): R|kotlin/String|
+
+        }
+
+        public final static fun values(): R|kotlin/Array<some2/Some>| {
+        }
+
+        public final static fun valueOf(value: R|kotlin/String|): R|some2/Some| {
+        }
+
+        public final static val entries: R|kotlin/enums/EnumEntries<some2/Some>|
+            public get(): R|kotlin/enums/EnumEntries<some2/Some>|
+
+    }
+FILE: main.kt
+    public final fun test(): R|some2/Some| {
+        ^test Q|some2/Some|.R|some2/Some.foo|
+    }

compiler/testData/diagnostics/testsWithStdLib/resolve/ambiguousTypeReferences/qualifierEnumEntryOrCompanionMemberCase.kt

@@ -0,0 +1,36 @@
+// ISSUE: KT-56520 (case 7, enum entry vs companion member, one companion in scope)
+// FIR_DUMP
+
+// FILE: some/Some.kt
+package some
+
+enum class Some {
+    foo; // (1)
+
+    // companion object {}
+}
+
+// FILE: some2/Some.kt
+package some2
+
+enum class Some {
+    foo; // (2)
+
+    companion object {
+        val foo = "2'" // (2')
+    }
+}
+
+// FILE: some3/Some.java
+package some3;
+
+public enum Some {
+    foo; // (3)
+}
+
+// FILE: main.kt
+import some.*
+import some2.*
+import some3.*
+
+fun test() = <!UNRESOLVED_REFERENCE!>Some<!>.<!DEBUG_INFO_MISSING_UNRESOLVED!>foo<!>

compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/DiagnosticTestGenerated.java

@@ -44849,6 +44849,12 @@ public class DiagnosticTestGenerated extends AbstractDiagnosticTest {
                     runTest("compiler/testData/diagnostics/testsWithStdLib/resolve/ambiguousTypeReferences/constructorCaseSpace.kt");
                 }
 
+                @Test
+                @TestMetadata("qualifierEnumEntryOrCompanionMemberCase.kt")
+                public void testQualifierEnumEntryOrCompanionMemberCase() throws Exception {
+                    runTest("compiler/testData/diagnostics/testsWithStdLib/resolve/ambiguousTypeReferences/qualifierEnumEntryOrCompanionMemberCase.kt");
+                }
+
                 @Test
                 @TestMetadata("qualifierForStaticCase.kt")
                 public void testQualifierForStaticCase() throws Exception {