[Test] Add test for KT-57968

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

@@ -27339,6 +27339,12 @@ public class DiagnosticCompilerTestFE10TestdataTestGenerated extends AbstractDia
                     KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/diagnostics/tests/resolve/priority"), Pattern.compile("^(.+)\\.kt$"), Pattern.compile("^(.+)\\.(reversed|fir|ll)\\.kts?$"), true, "multiplatform");
                 }
 
+                @Test
+                @TestMetadata("extensionVsMember.kt")
+                public void testExtensionVsMember() throws Exception {
+                    runTest("compiler/testData/diagnostics/tests/resolve/priority/extensionVsMember.kt");
+                }
+
                 @Test
                 @TestMetadata("invokeExtensionVsOther.kt")
                 public void testInvokeExtensionVsOther() throws Exception {

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

@@ -27339,6 +27339,12 @@ public class LLFirPreresolvedReversedDiagnosticCompilerFE10TestDataTestGenerated
                     KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/diagnostics/tests/resolve/priority"), Pattern.compile("^(.+)\\.kt$"), Pattern.compile("^(.+)\\.(reversed|fir|ll)\\.kts?$"), true, "multiplatform");
                 }
 
+                @Test
+                @TestMetadata("extensionVsMember.kt")
+                public void testExtensionVsMember() throws Exception {
+                    runTest("compiler/testData/diagnostics/tests/resolve/priority/extensionVsMember.kt");
+                }
+
                 @Test
                 @TestMetadata("invokeExtensionVsOther.kt")
                 public void testInvokeExtensionVsOther() throws Exception {

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

@@ -27339,6 +27339,12 @@ public class FirLightTreeOldFrontendDiagnosticsTestGenerated extends AbstractFir
                     KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/diagnostics/tests/resolve/priority"), Pattern.compile("^(.+)\\.kt$"), Pattern.compile("^(.+)\\.(reversed|fir|ll)\\.kts?$"), true, "multiplatform");
                 }
 
+                @Test
+                @TestMetadata("extensionVsMember.kt")
+                public void testExtensionVsMember() throws Exception {
+                    runTest("compiler/testData/diagnostics/tests/resolve/priority/extensionVsMember.kt");
+                }
+
                 @Test
                 @TestMetadata("invokeExtensionVsOther.kt")
                 public void testInvokeExtensionVsOther() throws Exception {

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

@@ -27351,6 +27351,12 @@ public class FirPsiOldFrontendDiagnosticsTestGenerated extends AbstractFirPsiDia
                     KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/diagnostics/tests/resolve/priority"), Pattern.compile("^(.*)\\.kts?$"), Pattern.compile("^(.+)\\.(reversed|fir|ll)\\.kts?$"), true, "multiplatform");
                 }
 
+                @Test
+                @TestMetadata("extensionVsMember.kt")
+                public void testExtensionVsMember() throws Exception {
+                    runTest("compiler/testData/diagnostics/tests/resolve/priority/extensionVsMember.kt");
+                }
+
                 @Test
                 @TestMetadata("invokeExtensionVsOther.kt")
                 public void testInvokeExtensionVsOther() throws Exception {

compiler/testData/diagnostics/tests/resolve/priority/extensionVsMember.kt

@@ -0,0 +1,11 @@
+// FIR_IDENTICAL
+// ISSUE: KT-57968
+
+class Some(val child: Some?)
+
+val Some.foo get(): Int =
+    if ((child?.foo ?: 0) > 1) {
+        0
+    } else {
+        1
+    }

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

@@ -28123,6 +28123,12 @@ public class DiagnosticTestGenerated extends AbstractDiagnosticTest {
                     KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/diagnostics/tests/resolve/priority"), Pattern.compile("^(.*)\\.kts?$"), Pattern.compile("^(.+)\\.(reversed|fir|ll)\\.kts?$"), true);
                 }
 
+                @Test
+                @TestMetadata("extensionVsMember.kt")
+                public void testExtensionVsMember() throws Exception {
+                    runTest("compiler/testData/diagnostics/tests/resolve/priority/extensionVsMember.kt");
+                }
+
                 @Test
                 @TestMetadata("invokeExtensionVsOther.kt")
                 public void testInvokeExtensionVsOther() throws Exception {