✅ test: Objects can be converted to YMaps

src/utility.spec.ts

@@ -1,5 +1,5 @@
 import * as Y from "yjs";
-import { arrayToYArray, yArrayToArray, } from "./utility";
+import { arrayToYArray, objectToYMap, yArrayToArray, } from "./utility";
 
 describe("arrayToYArray", () =>
 {
@@ -104,3 +104,26 @@ describe("arrayToYArray and yArrayToArray are inverses", () =>
     expect(yArrayToArray(ymap.get("array"))).toEqual(array);
   });
 });
+
+describe("objectToYMap", () =>
+{
+  it("Converts an empty object into an empty YMap.", () =>
+  {
+    const ydoc = new Y.Doc();
+    const ymap = ydoc.getMap("tmp");
+
+    ymap.set("map", objectToYMap({}));
+
+    expect(ymap.get("map").toJSON()).toEqual({});
+  });
+
+  it("Converts an non-empty object into a YMap with the same entries.", () =>
+  {
+    const ydoc = new Y.Doc();
+    const ymap = ydoc.getMap("tmp");
+
+    ymap.set("map", objectToYMap({ "foo": 1, }));
+
+    expect(ymap.get("map").toJSON()).toEqual({ "foo": 1, });
+  });
+});

src/utility.ts

@@ -17,4 +17,16 @@ export const arrayToYArray = (array: any[]): Y.Array<any> =>
 };
 
 export const yArrayToArray = (yarray: Y.Array<any>): any[] =>
-  yarray.toJSON();
+  yarray.toJSON();
+
+export const objectToYMap = (object: any): Y.Map<any> =>
+{
+  const ymap = new Y.Map();
+
+  Object.entries(object).forEach(([ property, value ]) =>
+  {
+    ymap.set(property, value);
+  });
+
+  return ymap;
+};