JSPM – dependency-injector-pattern@1.0.3

Package Exports

dependency-injector-pattern
dependency-injector-pattern/dist/index.js

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (dependency-injector-pattern) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

Dependency injector pattern library

Install library

npm i dependency-injector-pattern

How to use

@Injectable()
class Foo {
    hello() {
        console.log('Hello')
    }
}

@Injectable()
class Test {
    constructor(private readonly foo: Foo) {}

    test() {
        this.foo.hello()
    }
}

const testService = Injector.resolve(Test)
testService.test()
'Hello'

How to test

@Injectable()
class Foo {

    mockedFunction() {
        return false
    }
}

@Injectable()
class Test {
    constructor(private readonly foo: Foo) {}

    testInjection() {
        return this.foo.mockedFunction()
    }
}

const FooMock = {
    mockedFunction: jest.fn(() => true)
}

describe("Should test injection pattern", () => {

    let useTest: Test;

    beforeEach(() => {
        Injector.container.clear()
        Injector.mock("Foo", FooMock)
        useTest = Injector.resolve(Test)
        jest.clearAllMocks()
    })
    
    it("Should Test class exist", () => {
        expect(useTest).toBeTruthy()
    })

    it("Should call mocked function inject via dependency", () => {
        useTest.testInjection()
        expect(FooMock.mockedFunction).toHaveBeenCalled()
    })
})

dependency-injector-pattern