fix(ts-model-api): new single childs can have correct concept

Author: Hendrik Schmitz

model-api-gen-gradle-test/typescript-generation/package-lock.json

@@ -0,0 +1,48 @@
+/*
+ * Note: Ideally, this test should be placed in the ts-model-api module.
+ * However, due to the complexity of testing the code without the context
+ * of the generated languages, we will conduct the test here for now.
+ */
+
+import {
+  BaseCommentAttribute,
+  C_BaseCommentAttribute,
+  C_BaseConcept,
+  C_TypeAnnotated,
+  isOfConcept_BaseConcept,
+  isOfConcept_TypeAnnotated,
+} from "../build/typescript_src/L_jetbrains_mps_lang_core";
+import { useFakeNode } from "./test-helpers";
+
+const NODE_DATA_WITH_SINGLE_CHILD_ACCESSOR = {
+  root: {
+    children: [
+      {
+        concept: C_BaseCommentAttribute.getUID(),
+        role: "withSingleChildAccessor",
+        properties: {
+          name: "aName",
+        },
+      },
+    ],
+  },
+};
+
+test("new element can be added to SingleChildAccessor when provided the correct base concept", () => {
+  const { typedNode } = useFakeNode<BaseCommentAttribute>(
+    "withSingleChildAccessor",
+    NODE_DATA_WITH_SINGLE_CHILD_ACCESSOR
+  );
+  const childNode = typedNode.commentedNode.setNew(C_BaseConcept);
+  expect(isOfConcept_BaseConcept(childNode)).toBeTruthy();
+});
+
+test("new element can be added to SingleChildAccessor when provided a sub concept", () => {
+  const { typedNode } = useFakeNode<BaseCommentAttribute>(
+    "withSingleChildAccessor",
+    NODE_DATA_WITH_SINGLE_CHILD_ACCESSOR
+  );
+  const childNode = typedNode.commentedNode.setNew(C_TypeAnnotated);
+  expect(isOfConcept_TypeAnnotated(childNode)).toBeTruthy();
+  expect(isOfConcept_BaseConcept(childNode)).toBeTruthy();
+});

model-api-gen-gradle-test/typescript-generation/src/ChildrenAccessor.test.ts

@@ -1,5 +1,5 @@
 import { org } from "@modelix/model-client";
-import { LanguageRegistry } from "@modelix/ts-model-api";
+import { ITypedNode, LanguageRegistry } from "@modelix/ts-model-api";
 import { registerLanguages } from "../build/typescript_src";
 
 const DEFAULT_NODE_DATA = {
@@ -31,8 +31,8 @@ export function useFakeRootNode(nodeData: object = DEFAULT_NODE_DATA) {
     return rootNode.getChildren(role)[0];
   }
 
-  function getTypedNode(role?: string) {
-    return LanguageRegistry.INSTANCE.wrapNode(getUntypedNode(role));
+  function getTypedNode<T extends ITypedNode>(role?: string) {
+    return LanguageRegistry.INSTANCE.wrapNode(getUntypedNode(role)) as T;
   }
 
   return {
@@ -42,11 +42,14 @@ export function useFakeRootNode(nodeData: object = DEFAULT_NODE_DATA) {
   };
 }
 
-export function useFakeNode(role?: string, nodeData?: object) {
+export function useFakeNode<T extends ITypedNode>(
+  role?: string,
+  nodeData?: object
+) {
   const { getUntypedNode, getTypedNode, rootNode } = useFakeRootNode(nodeData);
   return {
     rootNode,
     untypedNode: getUntypedNode(role),
-    typedNode: getTypedNode(role),
+    typedNode: getTypedNode<T>(role),
   };
 }

model-api-gen-gradle-test/typescript-generation/src/test-helpers.ts

@@ -44,11 +44,11 @@ export class SingleChildAccessor<ChildT extends ITypedNode> extends ChildrenAcce
     return children.length === 0 ? undefined : children[0]
   }
 
-  public setNew(): ChildT {
+  public setNew(subconcept?: IConceptJS | undefined): ChildT {
     const existing = this.get();
     if (existing !== undefined) {
       existing.remove();
     }
-    return this.wrapChild(this.parentNode.addNewChild(this.role, 0, undefined))
+    return this.wrapChild(this.parentNode.addNewChild(this.role, 0, subconcept))
   }
 }