pathOr.js

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


describe('pathOr', function() {
  var deepObject = {a: {b: {c: 'c'}}, falseVal: false, nullVal: null, undefinedVal: undefined, arrayVal: ['arr']};

  it('takes a path and an object and returns the value at the path or the default value', function() {
    var obj = {
      a: {
        b: {
          c: 100,
          d: 200
        },
        e: {
          f: [100, 101, 102],
          g: 'G'
        },
        h: 'H'
      },
      i: 'I',
      j: ['J']
    };
    eq(R.pathOr('Unknown', ['a', 'b', 'c'], obj), 100);
    eq(R.pathOr('Unknown', [], obj), obj);
    eq(R.pathOr('Unknown', ['a', 'e', 'f', 1], obj), 101);
    eq(R.pathOr('Unknown', ['j', 0], obj), 'J');
    eq(R.pathOr('Unknown', ['j', 1], obj), 'Unknown');
    eq(R.pathOr('Unknown', ['a', 'b', 'c'], null), 'Unknown');
  });

  it("gets a deep property's value from objects", function() {
    eq(R.pathOr('Unknown', ['a', 'b', 'c'], deepObject), 'c');
    eq(R.pathOr('Unknown', ['a'], deepObject), deepObject.a);
  });

  it('returns the default value for items not found', function() {
    eq(R.pathOr('Unknown', ['a', 'b', 'foo'], deepObject), 'Unknown');
    eq(R.pathOr('Unknown', ['bar'], deepObject), 'Unknown');
  });

  it('returns the default value for null/undefined', function() {
    eq(R.pathOr('Unknown', ['toString'], null), 'Unknown');
    eq(R.pathOr('Unknown', ['toString'], undefined), 'Unknown');
  });

  it('works with falsy items', function() {
    eq(R.pathOr('Unknown', ['toString'], false), Boolean.prototype.toString);
  });

});