Create a directive mock

[dianjuar]

Useful to implement in test and inject the mock instead of the real one. Could be something like

import { Directive, Input } from '@angular/core';

@Directive({
    selector: '[appSticky]'
})
export class StickyMockDirective {
    @Input() sentinelOn: HTMLElement;
    @Input() classWhenSticky: string;
    @Input() debugMode: boolean;
}