ifEmpty.test.ts

import { testSuite, expect } from "manten";
import { nrml, testCollection } from "../../common";

export default testSuite(async ({ describe }) => {
  describe("ifEmpty", ({ test }) => {

    test("adds missing properties", () => {
      const collection = testCollection();
      collection.insert({ a: 1, b: 1, c: 1, d: "  " });
      collection.insert({ a: 2, b: 2, c: 2, d: [] });
      collection.insert({ a: 3, b: 3, c: 3, d: { e: "test" } });
      const found = nrml(collection.find({ a: { $gt: 0 } }, { ifEmpty: { d: 5 } }));
      expect(found).toEqual([
        { a: 1, b: 1, c: 1, d: 5 },
        { a: 2, b: 2, c: 2, d: 5 },
        { a: 3, b: 3, c: 3, d: { e: "test" } },
      ]);
    });

    test("adds missing properties using dot notation", () => {
      const collection = testCollection();
      collection.insert({ a: 1, b: 1, c: 1, d: { e: "  " } });
      collection.insert({ a: 2, b: 2, c: 2, d: { e: [] } });
      collection.insert({ a: 3, b: 3, c: 3, d: { e: "test" } });
      const found = nrml(collection.find({ a: { $gt: 0 } }, { ifEmpty: { "d.e": 5 } }));
      expect(found).toEqual([
        { a: 1, b: 1, c: 1, d: { e: 5 } },
        { a: 2, b: 2, c: 2, d: { e: 5 } },
        { a: 3, b: 3, c: 3, d: { e: "test" } },
      ]);
    });

    test("does not create new properties", () => {
      const collection = testCollection();
      collection.insert({ a: 1, b: 1, c: 1, d: "  " });
      collection.insert({ a: 2, b: 2, c: 2, d: [] });
      collection.insert({ a: 3, b: 3, c: 3, d: { e: "test" } });
      const found = nrml(collection.find({ a: { $gt: 0 } }, { ifEmpty: { e: 5 } }));
      expect(found).toEqual([
        { a: 1, b: 1, c: 1, d: "  " },
        { a: 2, b: 2, c: 2, d: [] },
        { a: 3, b: 3, c: 3, d: { e: "test" } },
      ]);
    });

  });
});