Fixed variable owner names.

Added signature builder tests for top level properties and functions.

src/main/java/org/openrewrite/kotlin/KotlinTypeGoat.kt

@@ -20,7 +20,9 @@ package org.openrewrite.kotlin
 
 import java.lang.Object
 
-// TODO: FIX ME. Files needs to declare fields and methods to assert type mapping.
+const val field = 10
+fun function() {}
+
 @AnnotationWithRuntimeRetention
 @AnnotationWithSourceRetention
 abstract class KotlinTypeGoat<T, S> where S: PT<S>, S: C {

src/main/kotlin/org/openrewrite/kotlin/KotlinTypeSignatureBuilder.kt

@@ -577,6 +577,8 @@ class KotlinTypeSignatureBuilder(private val firSession: FirSession) : JavaTypeS
             }
         } else if (ownerSymbol is FirFunctionSymbol<*>) {
             owner = methodDeclarationSignature(ownerSymbol, null)
+        } else if (ownerSymbol is FirFileSymbol) {
+            owner = convertFileNameToFqn(ownerSymbol.fir.name)
         } else if (ownerSymbol != null) {
             owner = classSignature(ownerSymbol.fir)
         }

src/test/java/org/openrewrite/kotlin/KotlinTypeSignatureBuilderTest.java

@@ -159,6 +159,24 @@ public String methodSignature(String methodName) {
                 .getSymbol(), null);
     }
 
+    @Test
+    void fileField() {
+        FirProperty firProperty = getCompiledSource().getDeclarations().stream()
+          .filter(it -> it instanceof FirProperty && "field".equals(((FirProperty) it).getName().asString()))
+          .map(it -> (FirProperty) it).findFirst().orElseThrow();
+        assertThat(signatureBuilder().variableSignature(firProperty.getSymbol(), getCompiledSource().getSymbol()))
+          .isEqualTo("KotlinTypeGoatKt{name=field,type=kotlin.Int}");
+    }
+
+    @Test
+    void fileFunction() {
+        FirSimpleFunction function = getCompiledSource().getDeclarations().stream()
+          .filter(it -> it instanceof FirSimpleFunction && "function".equals(((FirSimpleFunction) it).getName().asString()))
+          .map(it -> (FirSimpleFunction) it).findFirst().orElseThrow();
+        assertThat(signatureBuilder().methodDeclarationSignature(function.getSymbol(), getCompiledSource().getSymbol()))
+          .isEqualTo("KotlinTypeGoatKt{name=function,return=kotlin.Unit,parameters=[]}");
+    }
+
     @Test
     void constructor() {
         assertThat(constructorSignature())

src/test/resources/KotlinTypeGoat.kt

@@ -20,7 +20,9 @@ package org.openrewrite.kotlin
 
 import java.lang.Object
 
-// TODO: FIX ME. Files needs to declare fields and methods to assert type mapping.
+const val field = 10
+fun function() {}
+
 @AnnotationWithRuntimeRetention
 @AnnotationWithSourceRetention
 abstract class KotlinTypeGoat<T, S> where S: PT<S>, S: C {