FIR LC: use the same module name as U/LC tests in IJ

analysis/symbol-light-classes/tests/org/jetbrains/kotlin/light/classes/symbol/base/AbstractSymbolLightClassesTestBase.kt

@@ -16,6 +16,7 @@ import org.jetbrains.kotlin.asJava.finder.JavaElementFinder
 import org.jetbrains.kotlin.light.classes.symbol.base.service.NullabilityAnnotationSourceProvider
 import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.test.builders.TestConfigurationBuilder
+import org.jetbrains.kotlin.test.directives.ModuleStructureDirectives
 import org.jetbrains.kotlin.test.directives.ConfigurationDirectives
 import org.jetbrains.kotlin.test.directives.model.DirectiveApplicability
 import org.jetbrains.kotlin.test.directives.model.SimpleDirectivesContainer
@@ -29,6 +30,9 @@ import java.nio.file.Path
 import kotlin.io.path.exists
 import kotlin.io.path.nameWithoutExtension
 
+// Same as LightProjectDescriptor.TEST_MODULE_NAME
+private const val TEST_MODULE_NAME = "light_idea_test_case"
+
 abstract class AbstractSymbolLightClassesTestBase(
     override val configurator: AnalysisApiTestConfigurator
 ) : AbstractAnalysisApiBasedSingleModuleTest() {
@@ -41,6 +45,7 @@ abstract class AbstractSymbolLightClassesTestBase(
             useAdditionalSourceProviders(::NullabilityAnnotationSourceProvider)
             defaultDirectives {
                 +ConfigurationDirectives.WITH_STDLIB
+                ModuleStructureDirectives.MODULE + TEST_MODULE_NAME
             }
         }
     }

compiler/testData/asJava/ultraLightClasses/inheritance.fir.java

@@ -26,7 +26,7 @@ public abstract class Base /* Base*/ {
 
   public final void nv();//  nv()
 
-  public int getX$main();//  getX$main()
+  public int getX$light_idea_test_case();//  getX$light_idea_test_case()
 
   public int getY();//  getY()
 
@@ -43,7 +43,7 @@ public final class Derived /* Derived*/ extends Base implements IntfWithProp {
 
   public int abs();//  abs()
 
-  public int getX$main();//  getX$main()
+  public int getX$light_idea_test_case();//  getX$light_idea_test_case()
 
 }
 
@@ -64,7 +64,7 @@ public abstract class AnotherDerived /* AnotherDerived*/ extends Base {
 
   public abstract void noReturn(@org.jetbrains.annotations.NotNull() java.lang.String);//  noReturn(java.lang.String)
 
-  public int getX$main();//  getX$main()
+  public int getX$light_idea_test_case();//  getX$light_idea_test_case()
 
   public int getY();//  getY()
 

compiler/testData/asJava/ultraLightClasses/lateinitProperty.fir.java

@@ -39,24 +39,24 @@ public class B /* B*/ {
   public java.lang.String d;
 
   @org.jetbrains.annotations.NotNull()
-  public final java.lang.String getA$main();//  getA$main()
+  public final java.lang.String getA$light_idea_test_case();//  getA$light_idea_test_case()
 
   @org.jetbrains.annotations.NotNull()
-  public final java.lang.String getB$main();//  getB$main()
+  public final java.lang.String getB$light_idea_test_case();//  getB$light_idea_test_case()
 
   @org.jetbrains.annotations.NotNull()
-  public final java.lang.String getC$main();//  getC$main()
+  public final java.lang.String getC$light_idea_test_case();//  getC$light_idea_test_case()
 
   @org.jetbrains.annotations.NotNull()
-  public final java.lang.String getD$main();//  getD$main()
+  public final java.lang.String getD$light_idea_test_case();//  getD$light_idea_test_case()
 
-  protected final void setC$main(@org.jetbrains.annotations.NotNull() java.lang.String);//  setC$main(java.lang.String)
+  protected final void setC$light_idea_test_case(@org.jetbrains.annotations.NotNull() java.lang.String);//  setC$light_idea_test_case(java.lang.String)
 
   public  B();//  .ctor()
 
-  public final void setA$main(@org.jetbrains.annotations.NotNull() java.lang.String);//  setA$main(java.lang.String)
+  public final void setA$light_idea_test_case(@org.jetbrains.annotations.NotNull() java.lang.String);//  setA$light_idea_test_case(java.lang.String)
 
-  public final void setD$main(@org.jetbrains.annotations.NotNull() java.lang.String);//  setD$main(java.lang.String)
+  public final void setD$light_idea_test_case(@org.jetbrains.annotations.NotNull() java.lang.String);//  setD$light_idea_test_case(java.lang.String)
 
 }
 

compiler/testData/asJava/ultraLightClasses/properties.fir.java

@@ -102,7 +102,7 @@ public final class Foo /* Foo*/ {
   public final java.lang.String getDelegatedProp();//  getDelegatedProp()
 
   @org.jetbrains.annotations.NotNull()
-  public final java.lang.String getInternalVarPrivateSet$main();//  getInternalVarPrivateSet$main()
+  public final java.lang.String getInternalVarPrivateSet$light_idea_test_case();//  getInternalVarPrivateSet$light_idea_test_case()
 
   @org.jetbrains.annotations.NotNull()
   public final java.lang.String getLazyProp();//  getLazyProp()
@@ -111,7 +111,7 @@ public final class Foo /* Foo*/ {
   public final java.lang.String getName();//  getName()
 
   @org.jetbrains.annotations.NotNull()
-  public final java.lang.String getStringRepresentation$main();//  getStringRepresentation$main()
+  public final java.lang.String getStringRepresentation$light_idea_test_case();//  getStringRepresentation$light_idea_test_case()
 
   @org.jetbrains.annotations.NotNull()
   public final kotlin.jvm.functions.Function1<java.lang.Integer, java.lang.Integer> getSum();//  getSum()
@@ -163,7 +163,7 @@ public final class Foo /* Foo*/ {
 
   public final int getIntProp(int);//  getIntProp(int)
 
-  public final int getInternalWithPrivateSet$main();//  getInternalWithPrivateSet$main()
+  public final int getInternalWithPrivateSet$light_idea_test_case();//  getInternalWithPrivateSet$light_idea_test_case()
 
   public final void setC(boolean);//  setC(boolean)
 
@@ -187,7 +187,7 @@ public final class Foo /* Foo*/ {
 
   public final void setName(@org.jetbrains.annotations.NotNull() java.lang.String);//  setName(java.lang.String)
 
-  public final void setStringRepresentation$main(@org.jetbrains.annotations.NotNull() java.lang.String);//  setStringRepresentation$main(java.lang.String)
+  public final void setStringRepresentation$light_idea_test_case(@org.jetbrains.annotations.NotNull() java.lang.String);//  setStringRepresentation$light_idea_test_case(java.lang.String)
 
   public final void setSubject(error.NonExistentClass);//  setSubject(error.NonExistentClass)
 

compiler/testData/asJava/ultraLightClasses/simpleFunctions.fir.java

@@ -16,7 +16,7 @@ public final class Foo /* Foo*/ {
 
   public final int bar4();//  bar4()
 
-  public final void bar2$main(error.NonExistentClass, error.NonExistentClass);//  bar2$main(error.NonExistentClass, error.NonExistentClass)
+  public final void bar2$light_idea_test_case(error.NonExistentClass, error.NonExistentClass);//  bar2$light_idea_test_case(error.NonExistentClass, error.NonExistentClass)
 
   public void bar(int, @org.jetbrains.annotations.NotNull() java.lang.Object, @org.jetbrains.annotations.NotNull() Foo);//  bar(int, java.lang.Object, Foo)
 

compiler/tests-common-new/tests/org/jetbrains/kotlin/test/services/impl/ModuleStructureExtractorImpl.kt

@@ -316,7 +316,9 @@ class ModuleStructureExtractorImpl(
 
             val targetBackend = currentModuleTargetBackend ?: defaultsProvider.defaultTargetBackend
             currentModuleLanguageVersionSettingsBuilder.configureUsingDirectives(moduleDirectives, environmentConfigurators, targetBackend)
-            val moduleName = currentModuleName ?: DEFAULT_MODULE_NAME
+            val moduleName = currentModuleName
+                ?: testServices.defaultDirectives[ModuleStructureDirectives.MODULE].firstOrNull()
+                ?: DEFAULT_MODULE_NAME
             val targetPlatform = currentModuleTargetPlatform ?: parseModulePlatformByName(moduleName) ?: defaultsProvider.defaultPlatform
             val testModule = TestModule(
                 name = moduleName,