index.js

var extend = require('../index');
var test = require('tape');

var str = 'me a test';
var int = 10;
var arr = [1, 'what', new Date(81, 8, 4)];
var date = new Date(81, 4, 13);

var obj = {
  str: str,
  int: int,
  arr: arr,
  date: date
};

var deep = {
  ori: obj,
  layer: {
    int: 10,
    str: 'str',
    date: new Date(84, 5, 12),
    arr: [101, 'dude', new Date(82, 10, 4)],
    deep: {
      str: obj.str,
      int: int,
      arr: obj.arr,
      date: new Date(81, 7, 4)
    }
  }
};


test('merge string with string', function (t) {
  var ori = 'what u gonna say';
  var target = extend(ori, str);
  var expectedTarget = {
    '0': 'm',
    '1': 'e',
    '2': ' ',
    '3': 'a',
    '4': ' ',
    '5': 't',
    '6': 'e',
    '7': 's',
    '8': 't'
  };

  t.equal(ori, 'what u gonna say', 'original string 1 is unchanged');
  t.equal(str, 'me a test', 'original string 2 is unchanged');
  t.deepEqual(target, expectedTarget, 'string + string is merged object form of string');
  t.end();
});

test('merge string with number', function (t) {
  var ori = 'what u gonna say';
  var target = extend(ori, 10);

  t.equal(ori, 'what u gonna say', 'original string is unchanged');
  t.deepEqual(target, {}, 'string + number is empty object');

  t.end();
});

test('merge string with array', function (t) {
  var ori = 'what u gonna say';
  var target = extend(ori, arr);

  t.equal(ori, 'what u gonna say', 'original string is unchanged');
  t.deepEqual(arr, [1, 'what', new Date(81, 8, 4)], 'array is unchanged');
  t.deepEqual(target, {
    '0' : 1,
    '1' : 'what',
    '2' : new Date(81, 8, 4)
  }, 'string + array is array');
  t.end();
});

test('merge string with date', function (t) {
  var ori = 'what u gonna say';
  var target = extend(ori, date);

  var testDate = new Date(81, 4, 13);
  t.equal(ori, 'what u gonna say', 'original string is unchanged');
  t.deepEqual(date, testDate, 'date is unchanged');
  t.deepEqual(target, testDate, 'string + date is date');
  t.end();
});

test('merge string with obj', function (t) {
  var ori = 'what u gonna say';
  var target = extend(ori, obj);

  t.equal(ori, 'what u gonna say', 'original string is unchanged');
  var testObj = {
    str: 'me a test',
    int: 10,
    arr: [1, 'what', new Date(81, 8, 4)],
    date: new Date(81, 4, 13)
  };
  t.deepEqual(obj, testObj, 'original obj is unchanged');
  t.deepEqual(target, testObj, 'string + obj is obj');
  t.end();
});

test('merge number with string', function (t) {
  var ori = 20;
  var target = extend(ori, str);

  t.equal(ori, 20, 'number is unchanged');
  t.equal(str, 'me a test', 'string is unchanged');
  t.deepEqual(target, {
    '0': 'm',
    '1': 'e',
    '2': ' ',
    '3': 'a',
    '4': ' ',
    '5': 't',
    '6': 'e',
    '7': 's',
    '8': 't'
  }, 'number + string is object form of string');
  t.end();
});

test('merge number with number', function (t) {
  t.deepEqual(extend(20, 10), {}, 'number + number is empty object');
  t.end();
});

test('merge number with array', function (t) {
  var target = extend(20, arr);

  t.deepEqual(arr, [1, 'what', new Date(81, 8, 4)], 'array is unchanged');
  t.deepEqual(target, {
    '0': 1,
    '1': 'what',
    '2': new Date(81, 8, 4)
  }, 'number + arr is object with array contents');
  t.end();
});

test('merge number with date', function (t) {
  var target = extend(20, date);
  var testDate = new Date(81, 4, 13);

  t.deepEqual(date, testDate, 'original date is unchanged');
  t.deepEqual(target, testDate, 'number + date is date');
  t.end();
});

test('merge number with object', function (t) {
  var target = extend(20, obj);
  var testObj = {
    str: 'me a test',
    int: 10,
    arr: [ 1, 'what', new Date(81, 8, 4)],
    date: new Date(81, 4, 13)
  };

  t.deepEqual(obj, testObj, 'obj is unchanged');
  t.deepEqual(target, testObj, 'number + obj is obj');
  t.end();
});

test('merge array with string', function (t) {
  var ori = [1, 2, 3, 4, 5, 6];
  var target = extend(ori, str);

  t.deepEqual(ori, str.split(''), 'array is changed to be an array of string chars');
  t.equal(str, 'me a test', 'string is unchanged');
  t.deepEqual(target, {
    '0': 'm',
    '1': 'e',
    '2': ' ',
    '3': 'a',
    '4': ' ',
    '5': 't',
    '6': 'e',
    '7': 's',
    '8': 't'
  }, 'array + string is object form of string');
  t.end();
});

test('merge array with number', function (t) {
  var ori = [1, 2, 3, 4, 5, 6];
  var target = extend(ori, 10);

  t.deepEqual(ori, [1, 2, 3, 4, 5, 6], 'array is unchanged');
  t.deepEqual(target, ori, 'array + number is array');
  t.end();
});

test('merge array with array', function (t) {
  var ori = [1, 2, 3, 4, 5, 6];
  var target = extend(ori, arr);
  var testDate = new Date(81, 8, 4);
  var expectedTarget = [1, 'what', testDate, 4, 5, 6];

  t.deepEqual(ori, expectedTarget, 'array + array merges arrays; changes first array');
  t.deepEqual(arr, [1, 'what', testDate], 'second array is unchanged');
  t.deepEqual(target, expectedTarget, 'array + array is merged array');
  t.end();
});

test('merge array with date', function (t) {
  var ori = [1, 2, 3, 4, 5, 6];
  var target = extend(ori, date);
  var testDate = new Date(81, 4, 13);
  var testArray = [1, 2, 3, 4, 5, 6];

  t.deepEqual(ori, testArray, 'array is unchanged');
  t.deepEqual(date, testDate, 'date is unchanged');
  t.deepEqual(target, testArray, 'array + date is array');
  t.end();
});

test('merge array with object', function (t) {
  var ori = [1, 2, 3, 4, 5, 6];
  var target = extend(ori, obj);
  var testObject = {
    str: 'me a test',
    int: 10,
    arr: [1, 'what', new Date(81, 8, 4)],
    date: new Date(81, 4, 13)
  };

  t.deepEqual(obj, testObject, 'obj is unchanged');
  t.equal(ori.length, 6, 'array has proper length');
  t.equal(ori.str, obj.str, 'array has obj.str property');
  t.equal(ori.int, obj.int, 'array has obj.int property');
  t.deepEqual(ori.arr, obj.arr, 'array has obj.arr property');
  t.equal(ori.date, obj.date, 'array has obj.date property');

  t.equal(target.length, 6, 'target has proper length');
  t.equal(target.str, obj.str, 'target has obj.str property');
  t.equal(target.int, obj.int, 'target has obj.int property');
  t.deepEqual(target.arr, obj.arr, 'target has obj.arr property');
  t.equal(target.date, obj.date, 'target has obj.date property');
  t.end();
});

test('merge date with string', function (t) {
  var ori = new Date(81, 9, 20);
  var target = extend(ori, str);
  var testObject = {
    '0': 'm',
    '1': 'e',
    '2': ' ',
    '3': 'a',
    '4': ' ',
    '5': 't',
    '6': 'e',
    '7': 's',
    '8': 't'
  };

  t.deepEqual(ori, testObject, 'date is changed to object form of string');
  t.equal(str, 'me a test', 'string is unchanged');
  t.deepEqual(target, testObject, 'date + string is object form of string');
  t.end();
});

test('merge date with number', function (t) {
  var ori = new Date(81, 9, 20);
  var target = extend(ori, 10);

  t.deepEqual(ori, {}, 'date is changed to empty object');
  t.deepEqual(target, {}, 'date + number is empty object');
  t.end();
});

test('merge date with array', function (t) {
  var ori = new Date(81, 9, 20);
  var target = extend(ori, arr);
  var testDate = new Date(81, 9, 20);
  var testArray = [1, 'what', new Date(81, 8, 4)];

  t.deepEqual(ori, testDate, 'date is unchanged');
  t.deepEqual(arr, testArray, 'array is unchanged');
  t.deepEqual(target, testDate, 'date + array is date');
  t.end();
});

test('merge date with date', function (t) {
  var ori = new Date(81, 9, 20);
  var target = extend(ori, date);

  t.deepEqual(ori, {}, 'date is empty object');
  t.deepEqual(target, {}, 'date + date is empty object');
  t.end();
});

test('merge date with object', function (t) {
  var ori = new Date(81, 9, 20);
  var target = extend(ori, obj);
  var testDate = new Date(81, 8, 4);
  var testObject = {
    str: 'me a test',
    int: 10,
    arr: [1, 'what', testDate],
    date: new Date(81, 4, 13)
  };

  t.deepEqual(obj, testObject, 'original object is unchanged');
  t.deepEqual(ori, testObject, 'date becomes original object');
  t.deepEqual(target, testObject, 'date + object is object');
  t.end();
});

test('merge object with string', function (t) {
  var testDate = new Date(81, 7, 26);
  var ori = {
    str: 'no shit',
    int: 76,
    arr: [1, 2, 3, 4],
    date: testDate
  };
  var target = extend(ori, str);
  var testObj = {
    '0': 'm',
    '1': 'e',
    '2': ' ',
    '3': 'a',
    '4': ' ',
    '5': 't',
    '6': 'e',
    '7': 's',
    '8': 't',
    str: 'no shit',
    int: 76,
    arr: [1, 2, 3, 4],
    date: testDate
  };

  t.deepEqual(ori, testObj, 'original object updated');
  t.equal(str, 'me a test', 'string is unchanged');
  t.deepEqual(target, testObj, 'object + string is object + object form of string');
  t.end();
});

test('merge object with number', function (t) {
  var ori = {
    str: 'no shit',
    int: 76,
    arr: [1, 2, 3, 4],
    date: new Date(81, 7, 26)
  };
  var testObject = {
    str: 'no shit',
    int: 76,
    arr: [1, 2, 3, 4],
    date: new Date(81, 7, 26)
  };
  var target = extend(ori, 10);
  t.deepEqual(ori, testObject, 'object is unchanged');
  t.deepEqual(target, testObject, 'object + number is object');
  t.end();
});

test('merge object with array', function (t) {
  var ori = {
    str: 'no shit',
    int: 76,
    arr: [1, 2, 3, 4],
    date: new Date(81, 7, 26)
  };
  var target = extend(ori, arr);
  var testObject = {
    '0': 1,
    '1': 'what',
    '2': new Date(81, 8, 4),
    str: 'no shit',
    int: 76,
    arr: [1, 2, 3, 4],
    date: new Date(81, 7, 26)
  };

  t.deepEqual(ori, testObject, 'original object is merged');
  t.deepEqual(arr, [1, 'what', testObject[2]], 'array is unchanged');
  t.deepEqual(target, testObject, 'object + array is merged object');
  t.end();
});

test('merge object with date', function (t) {
  var ori = {
    str: 'no shit',
    int: 76,
    arr: [1, 2, 3, 4],
    date: new Date(81, 7, 26)
  };
  var target = extend(ori, date);
  var testObject = {
    str: 'no shit',
    int: 76,
    arr: [1, 2, 3, 4],
    date: new Date(81, 7, 26)
  };

  t.deepEqual(ori, testObject, 'original object is unchanged');
  t.deepEqual(date, new Date(81, 4, 13), 'date is unchanged');
  t.deepEqual(target, testObject, 'object + date is object');
  t.end();
});

test('merge object with object', function (t) {
  var ori = {
    str: 'no shit',
    int: 76,
    arr: [1, 2, 3, 4],
    date: new Date(81, 7, 26),
    foo: 'bar'
  };
  var target = extend(ori, obj);
  var expectedObj = {
    str: 'me a test',
    int: 10,
    arr: [1, 'what', new Date(81, 8, 4)],
    date: new Date(81, 4, 13)
  };
  var expectedTarget = {
    str: 'me a test',
    int: 10,
    arr: [1, 'what', new Date(81, 8, 4)],
    date: new Date(81, 4, 13),
    foo: 'bar'
  };

  t.deepEqual(obj, expectedObj, 'obj is unchanged');
  t.deepEqual(ori, expectedTarget, 'original has been merged');
  t.deepEqual(target, expectedTarget, 'object + object is merged object');
  t.end();
});

test('deep clone', function (t) {
  var ori = {
    str: 'no shit',
    int: 76,
    arr: [1, 2, 3, 4],
    date: new Date(81, 7, 26)
  };
  var target = extend(true, ori, deep);

  t.deepEqual(ori, {
    str: 'no shit',
    int: 76,
    arr: [1, 2, 3, 4],
    date: new Date(81, 7, 26),
    ori: {
      str: 'me a test',
      int: 10,
      arr: [1, 'what', new Date(81, 8, 4)],
      date: new Date(81, 4, 13)
    },
    layer: {
      int: 10,
      str: 'str',
      date: new Date(84, 5, 12),
      arr: [101, 'dude', new Date(82, 10, 4)],
      deep: {
        str: 'me a test',
        int: 10,
        arr: [1, 'what', new Date(81, 8, 4)],
        date: new Date(81, 7, 4)
      }
    }
  }, 'original object is merged');
  t.deepEqual(deep, {
    ori: {
      str: 'me a test',
      int: 10,
      arr: [1, 'what', new Date(81, 8, 4)],
      date: new Date(81, 4, 13)
    },
    layer: {
      int: 10,
      str: 'str',
      date: new Date(84, 5, 12),
      arr: [101, 'dude', new Date(82, 10, 4)],
      deep: {
        str: 'me a test',
        int: 10,
        arr: [1, 'what', new Date(81, 8, 4)],
        date: new Date(81, 7, 4)
      }
    }
  }, 'deep is unchanged');
  t.deepEqual(target, {
    str: 'no shit',
    int: 76,
    arr: [1, 2, 3, 4],
    date: new Date(81, 7, 26),
    ori: {
      str: 'me a test',
      int: 10,
      arr: [1, 'what', new Date(81, 8, 4)],
      date: new Date(81, 4, 13)
    },
    layer: {
      int: 10,
      str: 'str',
      date: new Date(84, 5, 12),
      arr: [101, 'dude', new Date(82, 10, 4)],
      deep: {
        str: 'me a test',
        int: 10,
        arr: [1, 'what', new Date(81, 8, 4)],
        date: new Date(81, 7, 4)
      }
    }
  }, 'deep + object + object is deeply merged object');

  target.layer.deep = 339;
  t.deepEqual(deep, {
    ori: {
      str: 'me a test',
      int: 10,
      arr: [1, 'what', new Date(81, 8, 4)],
      date: new Date(81, 4, 13)
    },
    layer: {
      int: 10,
      str: 'str',
      date: new Date(84, 5, 12),
      arr: [101, 'dude', new Date(82, 10, 4)],
      deep: {
        str: 'me a test',
        int: 10,
        arr: [1, 'what', new Date(81, 8, 4)],
        date: new Date(81, 7, 4)
      }
    }
  }, 'deep is unchanged after setting target property');
  //----- NEVER USE EXTEND WITH THE ABOVE SITUATION ------------------------------
  t.end();
});