Mastering State Management with Angular and NgRx/

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Testing Selectors

Testing Selectors

Learn how to unit test the NgRx selectors.

We'll cover the following...

Introduction

In our application’s Products module, we have defined the getProductsSelector in the src/app/products/state/products.selectors.ts file. This selector retrieves the entire products slice from the NgRx store.

import { createFeatureSelector } from "@ngrx/store";
import { ProductsState } from "./products.interfaces";
export const getProductsSelector = createFeatureSelector<ProductsState>('products');
Selectors defined in the Products module

In this lesson, let’s write a test case to verify that our getProductsSelector is properly retrieving the products slice.

Unit testing the NgRx selectors

We can unit test the NgRx ...