ifNull.test.ts

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

export default testSuite(async ({ describe }) => {
  describe("ifNull", ({ test }) => {
    test("adds missing properties", () => {
      const collection = testCollection();
      collection.insert({ a: 1, b: 1, c: 1 });
      collection.insert({ a: 2, b: 2, c: 2, d: null });
      collection.insert({ a: 3, b: 3, c: 3, d: "test" });
      const found = nrml(collection.find({ a: { $gt: 0 } }, { ifNull: { 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: "test" },
      ]);
    });

    test("adds missing properties using dot notation", () => {
      const collection = testCollection();
      collection.insert({ a: 1, b: 1, c: 1 });
      collection.insert({ a: 2, b: 2, c: 2 });
      collection.insert({ a: 3, b: 3, c: 3, d: { e: "test" } });
      const found = nrml(collection.find({ a: { $gt: 0 } }, { ifNull: { "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("doesn't overwrite properties", () => {
      const collection = testCollection();
      collection.insert({ a: 1, b: 1, c: 1 });
      collection.insert({ a: 2, b: 2, c: 2 });
      collection.insert({ a: 3, b: 3, c: 3, d: { e: "test" } });
      const found = nrml(collection.find({ a: { $gt: 0 } }, { ifNull: { c: 5 } }));
      expect(found).toEqual([
        { a: 1, b: 1, c: 1 },
        { a: 2, b: 2, c: 2 },
        { a: 3, b: 3, c: 3, d: { e: "test" } },
      ]);
    });

    test("works when the new value is a complex object", () => {
      const collection = testCollection();
      collection.insert({ a: 1, b: 1, c: 1 });
      collection.insert({ a: 2, b: 2, c: 2 });
      const found = nrml(collection.find({ a: { $gt: 0 } }, { ifNull: { d: { e: 5 } } }));
      expect(found).toEqual([{ a: 1, b: 1, c: 1, d: { e: 5 } }, { a: 2, b: 2, c: 2, d: { e: 5 } }]);
    });

    test("works when the new value is a null value", () => {
      const collection = testCollection();
      collection.insert({ a: 1, b: 1, c: 1 });
      collection.insert({ a: 2, b: 2, c: 2 });
      const found = nrml(collection.find({ a: { $gt: 0 } }, { ifNull: { d: null } }));
      expect(found).toEqual([{ a: 1, b: 1, c: 1, d: null }, { a: 2, b: 2, c: 2, d: null }]);
    });

    test("ifnull receives a function which is passed the document", () => {
      const collection = testCollection();
      collection.insert({ a: 1, b: 1, c: 1 });
      collection.insert({ a: 2, b: 2, c: 2 });
      const found = nrml(collection.find({ a: { $gt: 0 } }, { ifNull: { d: (doc) => doc.a } }));
      expect(found).toEqual([{ a: 1, b: 1, c: 1, d: 1 }, { a: 2, b: 2, c: 2, d: 2 }]);
    });

  });
});