FE MPP: add a test with expect value class B : interface with toString

Related to KT-54844

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

@@ -25,6 +25,12 @@ public class FirOldFrontendMPPDiagnosticsWithLightTreeTestGenerated extends Abst
         KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/diagnostics/tests/multiplatform"), Pattern.compile("^(.*)\\.kts?$"), Pattern.compile("^(.+)\\.(reversed|fir|ll)\\.kts?$"), TargetBackend.JVM_IR, true);
     }
 
+    @Test
+    @TestMetadata("expectAbstractToString.kt")
+    public void testExpectAbstractToString() throws Exception {
+        runTest("compiler/testData/diagnostics/tests/multiplatform/expectAbstractToString.kt");
+    }
+
     @Test
     @TestMetadata("expectDataObject.kt")
     public void testExpectDataObject() throws Exception {

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

@@ -25,6 +25,12 @@ public class FirOldFrontendMPPDiagnosticsWithPsiTestGenerated extends AbstractFi
         KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/diagnostics/tests/multiplatform"), Pattern.compile("^(.*)\\.kts?$"), Pattern.compile("^(.+)\\.(reversed|fir|ll)\\.kts?$"), TargetBackend.JVM_IR, true);
     }
 
+    @Test
+    @TestMetadata("expectAbstractToString.kt")
+    public void testExpectAbstractToString() throws Exception {
+        runTest("compiler/testData/diagnostics/tests/multiplatform/expectAbstractToString.kt");
+    }
+
     @Test
     @TestMetadata("expectDataObject.kt")
     public void testExpectDataObject() throws Exception {

compiler/testData/diagnostics/tests/multiplatform/expectAbstractToString.kt

@@ -0,0 +1,23 @@
+// FIR_IDENTICAL
+// WITH_STDLIB
+// MODULE: m1-common
+// FILE: common.kt
+
+interface B {
+    override fun toString(): String
+}
+
+expect value class C(val s: String) : B
+
+expect value class D(val s: String) : B
+
+// MODULE: m1-jvm()()(m1-common)
+// FILE: jvm.kt
+
+@JvmInline
+actual value class C(actual val s: String) : B {
+    override fun toString(): String = s
+}
+
+@JvmInline
+actual value class D(actual val s: String) : B

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

@@ -22330,6 +22330,12 @@ public class DiagnosticTestGenerated extends AbstractDiagnosticTest {
                 KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/diagnostics/tests/multiplatform"), Pattern.compile("^(.*)\\.kts?$"), Pattern.compile("^(.+)\\.(reversed|fir|ll)\\.kts?$"), true);
             }
 
+            @Test
+            @TestMetadata("expectAbstractToString.kt")
+            public void testExpectAbstractToString() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/multiplatform/expectAbstractToString.kt");
+            }
+
             @Test
             @TestMetadata("expectDataObject.kt")
             public void testExpectDataObject() throws Exception {