FIR IDE: add incremental analysis test for function in companion object

idea/idea-frontend-fir/idea-fir-low-level-api/testdata/outOfBlockProjectWide/funInCompanionObject.kt

@@ -0,0 +1,9 @@
+class X {
+    companion object {
+        fun x() {
+            a<caret>
+        }
+    }
+}
+
+// OUT_OF_BLOCK: false

idea/idea-frontend-fir/idea-fir-low-level-api/tests/org/jetbrains/kotlin/idea/fir/low/level/api/file/structure/FileStructureAndOutOfBlockModificationTrackerConsistencyTestGenerated.java

@@ -29,6 +29,11 @@ public class FileStructureAndOutOfBlockModificationTrackerConsistencyTestGenerat
         KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("idea/idea-frontend-fir/idea-fir-low-level-api/testdata/outOfBlockProjectWide"), Pattern.compile("^(.+)\\.kt$"), null, true);
     }
 
+    @TestMetadata("funInCompanionObject.kt")
+    public void testFunInCompanionObject() throws Exception {
+        runTest("idea/idea-frontend-fir/idea-fir-low-level-api/testdata/outOfBlockProjectWide/funInCompanionObject.kt");
+    }
+
     @TestMetadata("localFun.kt")
     public void testLocalFun() throws Exception {
         runTest("idea/idea-frontend-fir/idea-fir-low-level-api/testdata/outOfBlockProjectWide/localFun.kt");

idea/idea-frontend-fir/idea-fir-low-level-api/tests/org/jetbrains/kotlin/idea/fir/low/level/api/trackers/ProjectWideOutOfBlockKotlinModificationTrackerTestGenerated.java

@@ -29,6 +29,11 @@ public class ProjectWideOutOfBlockKotlinModificationTrackerTestGenerated extends
         KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("idea/idea-frontend-fir/idea-fir-low-level-api/testdata/outOfBlockProjectWide"), Pattern.compile("^(.+)\\.kt$"), null, true);
     }
 
+    @TestMetadata("funInCompanionObject.kt")
+    public void testFunInCompanionObject() throws Exception {
+        runTest("idea/idea-frontend-fir/idea-fir-low-level-api/testdata/outOfBlockProjectWide/funInCompanionObject.kt");
+    }
+
     @TestMetadata("localFun.kt")
     public void testLocalFun() throws Exception {
         runTest("idea/idea-frontend-fir/idea-fir-low-level-api/testdata/outOfBlockProjectWide/localFun.kt");