AugurProject/augur-ui

import toggleMemberOfArray from "src/utils/toggle-member-of-array";

describe("toggle-member-of-array", () => {
  const needle = "some-needle";
  const noiseValue = "noise-value";
  let result;
  let stack;

  describe("needle is a member of an array", () => {
    beforeEach(() => {
      stack = [noiseValue, needle];
      result = toggleMemberOfArray(stack, needle);
    });

    it("should remove just the needle", () => {
      expect(result).toEqual([noiseValue]);
    });

    it("should return a new array (not strictly equal)", () => {
      expect(result).not.toBe(stack);
    });
  });

  describe("needle is not a member of an array", () => {
    beforeEach(() => {
      stack = [noiseValue];
      result = toggleMemberOfArray(stack, needle);
    });

    it("should add the needle to the array", () => {
      expect(result).toEqual([noiseValue, needle]);
    });

    it("should return a new array (not strictly equal)", () => {
      expect(result).not.toBe(stack);
    });
  });
});