I am learning DI with Typescript (I use the tsyringe package in the example).
How can I tell a DI container that I want:
In the below example tsyringe creates two Bar instances (one in Foo and one for FooBar).
it("injects one Bar instance", () => {
@injectable()
class Bar {
constructor() {}
x = 1;
}
@injectable()
class Foo {
constructor(public myBar: Bar) {}
}
@injectable()
class FooBar {
constructor(public bar: Bar, public foo: Foo) {}
}
const fooBar = container.resolve(FooBar);
fooBar.bar.x = 2;
expect(fooBar.foo.myBar).toBe(2); // throws error (is 1)
});
For tsyringe, one has to use the @scoped decorator:
@scoped(Lifecycle.ResolutionScoped)
class Bar {
constructor() {}
}