[jssrc2cpg] Fix TS decorator handling

joern-cli/frontends/jssrc2cpg/src/main/scala/io/joern/jssrc2cpg/astcreation/AstForDeclarationsCreator.scala

@@ -75,10 +75,12 @@ trait AstForDeclarationsCreator(implicit withSchemaValidation: ValidationMode) {
         val node             = annotationNode(decorator, decorator.code, name, fullName)
         val assignmentAsts = exprNode.json("arguments").arr.toList.map { arg =>
           createBabelNodeInfo(arg).node match {
-            case AssignmentExpression =>
-              annotationAssignmentAst(code(arg("left")), code(arg), astForNodeWithFunctionReference(arg("right")))
+            case AssignmentExpression if !createBabelNodeInfo(arg("right")).node.isInstanceOf[FunctionLike] =>
+              annotationAssignmentAst(code(arg("left")), code(arg), astForNode(arg("right")))
+            case n if n.isInstanceOf[FunctionLike] =>
+              Ast()
             case _ =>
-              annotationAssignmentAst("value", code(arg), astForNodeWithFunctionReference(arg))
+              annotationAssignmentAst("value", code(arg), astForNode(arg))
           }
         }
         annotationAst(node, assignmentAsts)

joern-cli/frontends/jssrc2cpg/src/test/scala/io/joern/jssrc2cpg/passes/ast/TsDecoratorAstCreationPassTests.scala

@@ -1,6 +1,8 @@
 package io.joern.jssrc2cpg.passes.ast
 
 import io.joern.jssrc2cpg.testfixtures.AstJsSrc2CpgSuite
+import io.joern.x2cpg.passes.base.ContainsEdgePass
+import io.shiftleft.codepropertygraph.generated.nodes.{Method, TypeDecl, _containsIn}
 import io.shiftleft.semanticcpg.language.*
 
 class TsDecoratorAstCreationPassTests extends AstJsSrc2CpgSuite(".ts") {
@@ -323,6 +325,17 @@ class TsDecoratorAstCreationPassTests extends AstJsSrc2CpgSuite(".ts") {
           annotationD.parameterAssign.l shouldBe empty
       }
     }
+
+    "create annotations correctly with lambda function as annotation argument" in {
+      val cpg = code("""
+          |import { NgModule } from '@angular/core';
+          |
+          |@NgModule(() => { })
+          |export class MyClass { }
+          |""".stripMargin)
+      ContainsEdgePass(cpg).createAndApply()
+      cpg.methodRef.where(_._containsIn.collectAll[TypeDecl]) shouldBe empty
+    }
   }
 
 }