dressup

Typescript decorators

import { mix, decorate } from "dressup"
test('decorator demo', () => {
    class Base {
        constructor(private num: number = null) {
        }
        baseMethod() {
            return this.num;
        }
    }
    @decorate()
    class Derive extends Base {
        constructor(private inner: Base) {
            super(null);
        }
        deriveMethod() {
            return this.baseMethod() + 2;
        }
    }
    const bob = new Derive(new Base(10));
    expect(bob.baseMethod()).toBe(10);
    expect(bob.deriveMethod()).toBe(12);
})
test('mix demo', () => {
    class Rename {
        rename(name: string) {
            (this as any).name = name;
            return this;
        }
    }
    class Printable {
        print() {
            return (this as any).name;
        }
    }
    class Model extends mix(Rename, Printable) {
        name = "test";
    }
    expect(new Model().print()).toBe("test");
    expect(new Model().rename("hello").print()).toBe("hello");
})