e2e/__cases__/test-helpers/pass.spec.ts

@@ -1,5 +1,5 @@
 import { mocked } from 'ts-jest/utils'
-import { foo, bar } from './to-mock'
+import { foo, bar, MyClass } from './to-mock'
 jest.mock('./to-mock')
 
 test('foo', () => {
@@ -15,3 +15,17 @@ test('bar', () => {
   expect(mockedBar.dummy.deep.deeper()).toBeUndefined()
   expect(mockedBar.dummy.deep.deeper.mock.calls.length).toBe(1)
 })
+
+test("MyClass", () => {
+  const instance = new MyClass("hi");
+  const otherInstance = new MyClass("there");
+  expect(mocked(MyClass).mock.calls.length).toBe(2);
+
+  const mockedInstance = mocked(instance, true);
+  // mocked always returns undefined by default
+  expect(instance.myStr).toBeUndefined();
+  expect(mockedInstance.myProperty).toBeUndefined();
+  expect(instance.somethingClassy()).toBeUndefined();
+  expect(mockedInstance.somethingClassy.mock.calls.length).toBe(1);
+  expect(mocked(otherInstance).somethingClassy.mock.calls.length).toBe(0);
+});

e2e/__cases__/test-helpers/to-mock.ts

@@ -13,3 +13,13 @@ export namespace bar {
     }
   }
 }
+
+export class MyClass {
+  constructor(s: string) {
+    this.myProperty = 3
+    this.myStr = s
+  }
+  somethingClassy() { return this.myStr }
+  public myProperty: number;
+  public myStr: string;
+}

e2e/__templates__/default/package.json

@@ -3,7 +3,7 @@
   "version": "0.0.0-tmpl.0",
   "private": true,
   "devDependencies": {
-    "@types/jest": "23.3.9",
+    "@types/jest": "24.0.6",
     "@types/node": "10.12.5",
     "jest": "24.1.0",
     "typescript": "3.1.6"