How to mock static methods and non static methods using Jest

mocked-class.ts

export class MockedClass {
  public instanceMethod(): string {
    return "instance";
  }

public static staticMethod(): string {
    return "static";
  }

}

test-class.spec.ts

import {MockedClass} from './mocked-class'
jest.mock('./mocked-class');

describe('TestClass', () => {
  it ('should mock instance method', () => {
    const expectedValue: string = 'instanceMocked'
    MockedClass.mockImplementation(() => {
      return {
        instanceMethod: () => expectedValue
      };
    });

    const actualValue: string = new TestClass().callStaticMethod();

    expect(actualValue).toBe(expectedValue);
  });


  it ('should mock static method', () => {
    const expectedValue: string = 'staticMocked'
    MockedClass.staticMethod.mockImplementation(() => expectedValue);

    const actualValue: string = new TestClass().callStaticMethod();

    expect(actualValue).toBe(expectedValue);
  });
});

test-class.ts

import {MockedClass} from './mocked-class'

export class TestClass {
  public callInstanceMethod(): string {
    return new MockedClass().instanceMethod();
  }

  public callStaticMethod(): string {
    return MockedClass.staticMethod();
  }

}

Great example, thanks a lot. Guess MyClass in test-class.spec.ts is MockedClass?

Thanks. Yes, you're right. Fixed it and thanks again.