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

var testObj = {  a: 1,  b: 2,  c: 3};
describe('lensProp', function() {  describe('view', function() {    it('focuses object the specified object property', function() {      eq(R.view(R.lensProp('a'), testObj), 1);    });    it('returns undefined if the specified property does not exist', function() {      eq(R.view(R.lensProp('X'), testObj), undefined);    });  });  describe('set', function() {    it('sets the value of the object property specified', function() {      eq(R.set(R.lensProp('a'), 0, testObj), {a:0, b:2, c:3});    });    it('adds the property to the object if it doesn\'t exist', function() {      eq(R.set(R.lensProp('d'), 4, testObj), {a:1, b:2, c:3, d:4});    });  });  describe('over', function() {    it('applies function to the value of the specified object property', function() {      eq(R.over(R.lensProp('a'), R.inc, testObj), {a:2, b:2, c:3});    });    it('applies function to undefined and adds the property if it doesn\'t exist', function() {      eq(R.over(R.lensProp('X'), R.identity, testObj), {a:1, b:2, c:3, X:undefined});    });  });  describe('composability', function() {    it('can be composed', function() {      var nestedObj = {a: {b: 1}, c:2};      var composedLens = R.compose(R.lensProp('a'), R.lensProp('b'));
      eq(R.view(composedLens, nestedObj), 1);    });  });  describe('well behaved lens', function() {    it('set s (get s) === s', function() {      eq(R.set(R.lensProp('a'), R.view(R.lensProp('a'), testObj), testObj), testObj);    });    it('get (set s v) === v', function() {      eq(R.view(R.lensProp('a'), R.set(R.lensProp('a'), 0, testObj)), 0);    });    it('get (set(set s v1) v2) === v2', function() {      eq(        R.view(R.lensProp('a'), R.set(R.lensProp('a'), 11, R.set(R.lensProp('a'), 10, testObj))),        11      );    });  });});