@netdata/charts/dist/es6/helpers/deepMerge/index.test.js

Netdata frontend SDK and chart utilities

import deepMerge from ".";
describe("deepMerge", function () {
  it("returns objB when objA equals objB", function () {
    var obj = {
      a: 1
    };
    expect(deepMerge(obj, obj)).toBe(obj);
  });
  it("returns objB when objA is null", function () {
    var objB = {
      a: 1
    };
    expect(deepMerge(null, objB)).toBe(objB);
  });
  it("returns objB when objB is null", function () {
    var objA = {
      a: 1
    };
    expect(deepMerge(objA, null)).toBeNull();
  });
  it("returns objB when objA is not an object", function () {
    expect(deepMerge("string", {
      a: 1
    })).toEqual({
      a: 1
    });
    expect(deepMerge(42, {
      a: 1
    })).toEqual({
      a: 1
    });
  });
  it("returns objB when objB is not an object", function () {
    expect(deepMerge({
      a: 1
    }, "string")).toBe("string");
    expect(deepMerge({
      a: 1
    }, 42)).toBe(42);
  });
  it("detects implementation bug in deepMergeObject", function () {
    // This test documents that deepMergeObject doesn't return its result
    var objA = {
      a: 1,
      b: 2
    };
    var objB = {
      b: 3,
      c: 4
    };
    var result = deepMerge(objA, objB);
    expect(result).toBeUndefined();
  });
  it("detects implementation bug in deepMergeArray", function () {
    // This test documents current behavior - arrays return original arrA
    var arrA = [1, 2, 3];
    var arrB = [4, 5];
    var result = deepMerge(arrA, arrB);
    expect(result).toEqual([1, 2, 3]);
  });
});