test(case): add test case about frozen

test/immer-non-support.test.ts

@@ -1,3 +1,4 @@
+/* eslint-disable no-inner-declarations */
 /* eslint-disable symbol-description */
 /* eslint-disable no-unused-expressions */
 /* eslint-disable @typescript-eslint/ban-ts-comment */
@@ -503,3 +504,65 @@ test('error key setting in array', () => {
     }
   }
 });
+
+test(`Object values of a Map are not frozen anymore #1119`, () => {
+  {
+    enableMapSet();
+
+    interface Fruit {
+      key: string;
+      name: string;
+    }
+
+    const fruits: Fruit[] = [
+      { key: 'apple1', name: 'Red Delicious' },
+      { key: 'apple2', name: 'Gala' },
+    ];
+
+    let products = new Map<string, Fruit>();
+
+    function setFruitMap(fruits: Fruit[]): void {
+      products = produce(products, (draft) => {
+        draft.clear();
+        fruits.forEach((fruit) => draft.set(fruit.key, fruit));
+      });
+    }
+
+    setFruitMap(fruits);
+
+    const product = products.get('apple1');
+    // ! it should be frozen
+    expect(Object.isFrozen(product)).not.toBeTruthy();
+  }
+  {
+    interface Fruit {
+      key: string;
+      name: string;
+    }
+
+    const fruits: Fruit[] = [
+      { key: 'apple1', name: 'Red Delicious' },
+      { key: 'apple2', name: 'Gala' },
+    ];
+
+    let products: Immutable<Map<string, Fruit>> = new Map();
+
+    function setFruitMap(fruits: Fruit[]): void {
+      products = create(
+        products,
+        (draft) => {
+          draft.clear();
+          fruits.forEach((fruit) => draft.set(fruit.key, fruit));
+        },
+        {
+          enableAutoFreeze: true,
+        }
+      );
+    }
+
+    setFruitMap(fruits);
+
+    const product = products.get('apple1');
+    expect(Object.isFrozen(product)).toBeTruthy();
+  }
+});