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var assert = require('assert');
var R = require('../source');var eq = require('./shared/eq');

describe('mergeDeepLeft', function() {  it('takes two objects, recursively merges their own properties and returns a new object', function() {    var a = { w: 1, x: 2, y: { z: 3 }};    var b = { a: 4, b: 5, c: { d: 6 }};    eq(R.mergeDeepLeft(a, b), { w: 1, x: 2, y: { z: 3 }, a: 4, b: 5, c: { d: 6 }});  });
  it('overrides properties in the second object with properties in the first object', function() {    var a = { a: { b: 1, c: 2 }, y: 0 };    var b = { a: { b: 3, d: 4 }, z: 0 };    eq(R.mergeDeepLeft(a, b), { a: { b: 1, c: 2, d: 4 }, y: 0, z: 0 });  });
  it('is not destructive', function() {    var a = { w: 1, x: { y: 2 }};    var res = R.mergeDeepLeft(a, { x: { y: 3 }});    assert.notStrictEqual(a, res);    assert.notStrictEqual(a.x, res.x);    eq(res, { w: 1, x: { y: 2 }});  });
  it('reports only own properties', function() {    var a = { w: 1, x: { y: 2 }};    function Cla() {}    Cla.prototype.y = 5;    eq(R.mergeDeepLeft({ x: new Cla() }, a), { w: 1, x: { y: 2 }});    eq(R.mergeDeepLeft(a, { x: new Cla() }), { w: 1, x: { y: 2 }});  });
});