model-layer/test/Collection/array-methods/sort-spec.ts

model layer

import {Collection, Model, Types} from "../../../lib/index";
import assert from "assert";

class Product extends Model<Product> {
    structure() {
        return {
            name: Types.String,
            price: Types.Number
        };
    }
}

describe("Collection.sort", () => {

    it("sort(compareFunction)", () => {
        
        class Products extends Collection<Product> {
            Model() {
                return Product;
            }
        }

        const products = new Products([
            {name: "Pie", price: 10},
            {name: "Eggs", price: 1.8},
            {name: "Milk", price: 4}
        ]);

        assert.strictEqual( products.at(0)!.get("price"), 10 );
        assert.strictEqual( products.at(1)!.get("price"), 1.8 );
        assert.strictEqual( products.at(2)!.get("price"), 4 );

        products.sort((productA, productB) =>
            productA.get("price")! - productB.get("price")!
        );

        assert.strictEqual( products.at(0)!.get("price"), 1.8 );
        assert.strictEqual( products.at(1)!.get("price"), 4 );
        assert.strictEqual( products.at(2)!.get("price"), 10 );
    });

    it("sort(key)", () => {
        
        class Products extends Collection<Product> {
            Model() {
                return Product;
            }
        }

        const products = new Products([
            {name: "Pie", price: 10},
            {name: "Eggs", price: 1.8},
            {name: "Milk", price: 40}
        ]);

        assert.strictEqual( products.at(0)!.get("price"), 10 );
        assert.strictEqual( products.at(1)!.get("price"), 1.8 );
        assert.strictEqual( products.at(2)!.get("price"), 40 );

        products.sort("price");

        assert.strictEqual( products.at(0)!.get("price"), 1.8 );
        assert.strictEqual( products.at(1)!.get("price"), 10 );
        assert.strictEqual( products.at(2)!.get("price"), 40 );

        products.sort("name");

        assert.strictEqual( products.at(0)!.get("name"), "Eggs" );
        assert.strictEqual( products.at(1)!.get("name"), "Milk" );
        assert.strictEqual( products.at(2)!.get("name"), "Pie" );
    });

    it("sort(key1, key2)", () => {
        
        class Products extends Collection<Product> {
            Model() {
                return Product;
            }
        }

        const products = new Products([
            {name: "Pie", price: 10},
            {name: "Pie", price: 2},
            {name: "Pie", price: 3},
            {name: "Eggs", price: 1.8},
            {name: "Eggs", price: 3},
            {name: "Milk", price: 40},
            {name: "Milk", price: 20}
        ]);

        products.sort("name", "price");

        assert.strictEqual( products.at(0)!.get("name"), "Eggs" );
        assert.strictEqual( products.at(0)!.get("price"), 1.8 );

        assert.strictEqual( products.at(1)!.get("name"), "Eggs" );
        assert.strictEqual( products.at(1)!.get("price"), 3 );

        assert.strictEqual( products.at(2)!.get("name"), "Milk" );
        assert.strictEqual( products.at(2)!.get("price"), 20 );

        assert.strictEqual( products.at(3)!.get("name"), "Milk" );
        assert.strictEqual( products.at(3)!.get("price"), 40 );

        assert.strictEqual( products.at(4)!.get("name"), "Pie" );
        assert.strictEqual( products.at(4)!.get("price"), 2 );

        assert.strictEqual( products.at(5)!.get("name"), "Pie" );
        assert.strictEqual( products.at(5)!.get("price"), 3 );

        assert.strictEqual( products.at(6)!.get("name"), "Pie" );
        assert.strictEqual( products.at(6)!.get("price"), 10 );
    });

    it("sort(somethingWrong)", () => {
        
        class Products extends Collection<Product> {
            Model() {
                return Product;
            }
        }

        const products = new Products([
            {name: "Pie", price: 10},
            {name: "Eggs", price: 1.8},
            {name: "Milk", price: 40}
        ]);

        assert.throws(
            () => {
                products.sort();
            }, (err: Error) =>
                err.message === "invalid compareFunction or key: undefined"
        );
    });

});