Typescript + jasmine.createSpy()

Use the type already defined and used by Jasmine SpyObj<T>.

const serviceMock: jasmine.SpyObj<IMyService> = jasmine.createSpyObj<IMyService>('service',['method']);

This way every method of IMyService will be augmented with the Spy ones:

serviceMock.method.and.callFake(()=>'hello');

angular typescript unit-testing jasmine

Try it with a mapped type

export type Spied<T> = {    [Method in keyof T]: jasmine.Spy;};

and cast your service mock with it

const serviceMock = Spied<IMyService>{

Take a look here for a detailed description

angular typescript unit-testing jasmine

Try using the Partial type:

const serviceMock = <Partial<IMyService>>{

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