Вам необходимо шпионить за methodB
и methodC
за ClassA.prototype
. Это экземпляры методов, NOT class stati c методы.
Например, ClassA.ts
:
export class ClassA {
public methodA() {
this.methodB();
this.methodC();
return 'ClassA';
}
public methodB() {}
public methodC() {}
}
ClassA.test.ts
:
import { ClassA } from './classA';
describe('61315546', () => {
it('Sample Test', async () => {
const spyOn1 = jest.spyOn(ClassA.prototype, 'methodB');
spyOn1.mockImplementation(() => {
return () => {};
});
const spyOn2 = jest.spyOn(ClassA.prototype, 'methodC');
spyOn2.mockImplementation(() => {
return () => {};
});
const classA = new ClassA();
expect(classA.methodA()).toEqual('ClassA');
});
});
Результаты модульных испытаний с отчетом о покрытии:
PASS stackoverflow/61315546/ClassA.test.ts (12.1s)
61315546
✓ Sample Test (3ms)
-----------|---------|----------|---------|---------|-------------------
File | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s
-----------|---------|----------|---------|---------|-------------------
All files | 100 | 100 | 50 | 100 |
ClassA.ts | 100 | 100 | 50 | 100 |
-----------|---------|----------|---------|---------|-------------------
Test Suites: 1 passed, 1 total
Tests: 1 passed, 1 total
Snapshots: 0 total
Time: 13.974s