Class with custom instance implementation 🙌

export interface Interface {
    doSomething(): string;
}

export class InterfaceImplementation implements Interface {
    doSomething(): string {
        return "HI";
    }
}

export class ClassWithInterfaceDependency {
    constructor(private readonly dependency: Interface) {}
    doSomething(): string {
        return this.dependency.doSomething();
    }
}

Container.register([
    register("Interface").withImplementation(InterfaceImplementation).build(),
    register(ClassWithInterfaceDependency).withDependency("Interface").build(),
]);

const resolved = Container.resolve(ClassWithInterfaceDependency);

expect(resolved.doSomething()).toBe("HI");