How do I pass a component's reference to another component?

Question

I'm trying to pass a component to be rendered within another component:

// dynamic-component.ts
export class DynamicComponent {
@Input() content : ObservableContent;

this.render(component) {
    this.componentResolver.resolveComponent(component).then(factory => {
        let cmp = this.viewContainerRef.createComponent(factory, this.viewContainerRef.length, null, null);
        // render code
})
}

ngOnChanges(changes) {
    this.render(changes.content.currentValue);
}
}

What this does is take an input, content which is meant to be a reference to an instantiated component:

<dynamic-component [content]="dynamicComponent"></dynamic-component>

    // code:

    export class ComponentWhereDynamicIsLoaded {
        ...
        this.dynamicComponent = new TestComponent();
    }

When the parent component is loaded, dynamicComponent is rendered as the string [object] [Object], which makes sense, since im sure Angular parses the object returned by the TestComponent constructor as a string. The question is, how do I properly pass the TestComponent into the DynamicComponent?