Add _.chain tests and ensure they pass.

Former-commit-id: e365b65da8a740383c975c7b904ad2156d1cc8ab

build.js

@@ -367,14 +367,13 @@
       ].join('\n' + indent));
     });
 
-    // replace `lodash.chain` assignment
+    // replace `chain` assignments
     source = source.replace(getMethodAssignments(source), function(match) {
-      return match.replace(/^( *lodash\.chain *= *).+/m, '$1chain;');
+      return match
+        .replace(/^( *lodash\.chain *= *)[\s\S]+?(?=;\n)/m, '$1chain')
+        .replace(/^( *lodash\.prototype\.chain *= *)[\s\S]+?(?=;\n)/m, '$1wrapperChain');
     });
 
-    // add `lodash.prototype.chain` assignment
-    source = source.replace(/^( *)lodash\.prototype\.value *=.+\n/m, '$1lodash.prototype.chain = wrapperChain;\n$&');
-
     // remove `lodash.prototype.toString` and `lodash.prototype.valueOf` assignments
     source = source.replace(/^ *lodash\.prototype\.(?:toString|valueOf) *=.+\n/gm, '');
 

dist/lodash.compat.js

@@ -5376,7 +5376,6 @@
     lodash.zipObject = zipObject;
 
     // add aliases
-    lodash.chain = lodash;
     lodash.collect = map;
     lodash.drop = rest;
     lodash.each = forEach;
@@ -5387,6 +5386,10 @@
     lodash.tail = rest;
     lodash.unique = uniq;
 
+    // add chain compat
+    lodash.chain = lodash;
+    lodash.prototype.chain = function() { return this; };
+
     // add functions to `lodash.prototype`
     mixin(lodash);
 

dist/lodash.compat.min.js

@@ -36,7 +36,7 @@ if(!t&&xe(n)){e=-1;for(var o=n.length;++e<o;){var i=n[e];i<u&&(u=i)}}else t=!t&&
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dist/lodash.js

@@ -5066,7 +5066,6 @@
     lodash.zipObject = zipObject;
 
     // add aliases
-    lodash.chain = lodash;
     lodash.collect = map;
     lodash.drop = rest;
     lodash.each = forEach;
@@ -5077,6 +5076,10 @@
     lodash.tail = rest;
     lodash.unique = uniq;
 
+    // add chain compat
+    lodash.chain = lodash;
+    lodash.prototype.chain = function() { return this; };
+
     // add functions to `lodash.prototype`
     mixin(lodash);
 

dist/lodash.min.js

@@ -21,7 +21,7 @@ if(typeof u!="number")var i=we(n),u=i.length;return t=G.createCallback(t,r,4),bt
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+return u},G.toArray=function(n){return n&&typeof n.length=="number"?tt(n):st(n)},G.union=function(n){return ke(n)||(arguments[0]=n?me.call(n):Qt),St(te.apply(Qt,arguments))},G.uniq=St,G.unzip=At,G.values=st,G.where=yt,G.without=function(n){return Ct(n,me.call(arguments,1))},G.wrap=function(n,t){return function(){var e=[n];return ae.apply(e,arguments),t.apply(this,e)}},G.zip=function(n){return n?At(arguments):[]},G.zipObject=$t,G.collect=mt,G.drop=It,G.each=bt,G.extend=U,G.methods=ut,G.object=$t,G.select=yt,G.tail=It,G.unique=St,G.chain=G,G.prototype.chain=function(){return this
+},Tt(G),G.clone=rt,G.cloneDeep=function(n,t,e){return rt(n,r,t,e)},G.contains=vt,G.escape=function(n){return n==u?"":Jt(n).replace(j,X)},G.every=gt,G.find=ht,G.findIndex=function(n,t,e){var r=-1,u=n?n.length:0;for(t=G.createCallback(t,e);++r<u;)if(t(n[r],r,n))return r;return-1},G.findKey=function(n,t,e){var r;return t=G.createCallback(t,e),P(n,function(n,e,u){return t(n,e,u)?(r=e,a):void 0}),r},G.has=function(n,t){return n?ue.call(n,t):a},G.identity=Rt,G.indexOf=Et,G.isArguments=function(n){return fe.call(n)==O
+},G.isArray=ke,G.isBoolean=function(n){return n===r||n===a||fe.call(n)==I},G.isDate=function(n){return n?typeof n=="object"&&fe.call(n)==N:a},G.isElement=function(n){return n?1===n.nodeType:a},G.isEmpty=function(n){var t=r;if(!n)return t;var e=fe.call(n),u=n.length;return e==E||e==R||e==O||e==B&&typeof u=="number"&&it(n.splice)?!u:(P(n,function(){return t=a}),t)},G.isEqual=ot,G.isFinite=function(n){return pe(n)&&!se(parseFloat(n))},G.isFunction=it,G.isNaN=function(n){return ct(n)&&n!=+n},G.isNull=function(n){return n===u
+},G.isNumber=ct,G.isObject=ft,G.isPlainObject=f,G.isRegExp=function(n){return n?typeof n=="object"&&fe.call(n)==F:a},G.isString=lt,G.isUndefined=function(n){return typeof n=="undefined"},G.lastIndexOf=function(n,t,e){var r=n?n.length:0;for(typeof e=="number"&&(r=(0>e?ge(0,r+e):ye(e,r-1))+1);r--;)if(n[r]===t)return r;return-1},G.mixin=Tt,G.noConflict=function(){return o._=Xt,this},G.parseInt=zt,G.random=function(n,t){n==u&&t==u&&(t=1),n=+n||0,t==u?(t=n,n=0):t=+t||0;var e=be();return n%1||t%1?n+ye(e*(t-n+parseFloat("1e-"+((e+"").length-1))),t):n+ee(e*(t-n+1))
+},G.reduce=kt,G.reduceRight=wt,G.result=function(n,t){var r=n?n[t]:e;return it(r)?n[t]():r},G.runInContext=t,G.size=function(n){var t=n?n.length:0;return typeof t=="number"?t:we(n).length},G.some=jt,G.sortedIndex=Nt,G.template=function(n,t,u){var a=G.templateSettings;n||(n=""),u=M({},u,a);var o,i=M({},u.imports,a.imports),a=we(i),i=st(i),f=0,c=u.interpolate||w,l="__p+='",c=Ht((u.escape||w).source+"|"+c.source+"|"+(c===d?b:w).source+"|"+(u.evaluate||w).source+"|$","g");n.replace(c,function(t,e,u,a,i,c){return u||(u=a),l+=n.slice(f,c).replace(C,W),e&&(l+="'+__e("+e+")+'"),i&&(o=r,l+="';"+i+";__p+='"),u&&(l+="'+((__t=("+u+"))==null?'':__t)+'"),f=c+t.length,t
 }),l+="';\n",c=u=u.variable,c||(u="obj",l="with("+u+"){"+l+"}"),l=(o?l.replace(v,""):l).replace(g,"$1").replace(y,"$1;"),l="function("+u+"){"+(c?"":u+"||("+u+"={});")+"var __t,__p='',__e=_.escape"+(o?",__j=Array.prototype.join;function print(){__p+=__j.call(arguments,'')}":";")+l+"return __p}";try{var p=Mt(a,"return "+l).apply(e,i)}catch(s){throw s.source=l,s}return t?p(t):(p.source=l,p)},G.unescape=function(n){return n==u?"":Jt(n).replace(h,et)},G.uniqueId=function(n){var t=++c;return Jt(n==u?"":n)+t
 },G.all=gt,G.any=jt,G.detect=ht,G.foldl=kt,G.foldr=wt,G.include=vt,G.inject=kt,P(G,function(n,t){G.prototype[t]||(G.prototype[t]=function(){var t=[this.__wrapped__];return ae.apply(t,arguments),n.apply(G,t)})}),G.first=xt,G.last=function(n,t,e){if(n){var r=0,a=n.length;if(typeof t!="number"&&t!=u){var o=a;for(t=G.createCallback(t,e);o--&&t(n[o],o,n);)r++}else if(r=t,r==u||e)return n[a-1];return tt(n,ge(0,a-r))}},G.take=xt,G.head=xt,P(G,function(n,t){G.prototype[t]||(G.prototype[t]=function(t,e){var r=n(this.__wrapped__,t,e);
 return t==u||e&&typeof t!="function"?r:new Y(r)})}),G.VERSION="1.2.1",G.prototype.toString=function(){return Jt(this.__wrapped__)},G.prototype.value=qt,G.prototype.valueOf=qt,bt(["join","pop","shift"],function(n){var t=Qt[n];G.prototype[n]=function(){return t.apply(this.__wrapped__,arguments)}}),bt(["push","reverse","sort","unshift"],function(n){var t=Qt[n];G.prototype[n]=function(){return t.apply(this.__wrapped__,arguments),this}}),bt(["concat","slice","splice"],function(n){var t=Qt[n];G.prototype[n]=function(){return new Y(t.apply(this.__wrapped__,arguments))

dist/lodash.underscore.js

@@ -4282,7 +4282,6 @@
   lodash.zip = zip;
 
   // add aliases
-  lodash.chain = chain;
   lodash.collect = map;
   lodash.drop = rest;
   lodash.each = forEach;
@@ -4293,6 +4292,10 @@
   lodash.tail = rest;
   lodash.unique = uniq;
 
+  // add chain compat
+  lodash.chain = chain;
+  lodash.prototype.chain = wrapperChain;
+
   /*--------------------------------------------------------------------------*/
 
   // add functions that return unwrapped values when chaining
@@ -4369,7 +4372,6 @@
   mixin(lodash);
 
   // add "Chaining" functions to the wrapper
-  lodash.prototype.chain = wrapperChain;
   lodash.prototype.value = wrapperValueOf;
 
     // add `Array` mutator functions to the wrapper

dist/lodash.underscore.min.js

@@ -26,10 +26,10 @@ return mt.call(r,e)?r[e]:r[e]=n.apply(this,arguments)}},t.min=function(n,t,r){va
 u[t]=[o,n[o]]}return u},t.partial=function(n){return e(n,Bt.call(arguments,1))},t.pick=function(n){for(var t=-1,r=ht.apply(ct,Bt.call(arguments,1)),e=r.length,u={};++t<e;){var o=r[t];o in n&&(u[o]=n[o])}return u},t.pluck=N,t.range=function(n,t,r){n=+n||0,r=+r||1,null==t&&(t=n,n=0);var e=-1;t=Ot(0,vt((t-n)/r));for(var u=Array(t);++e<t;)u[e]=n,n+=r;return u},t.reject=function(n,t,r){return t=P(t,r),A(n,function(n,r,e){return!t(n,r,e)})},t.rest=$,t.shuffle=function(n){var t=-1,r=n?n.length:0,e=Array(typeof r=="number"?r:0);
 return E(n,function(n){var r=yt(Nt()*(++t+1));e[t]=e[r],e[r]=n}),e},t.sortBy=function(n,t,e){var u=-1,o=n?n.length:0,i=Array(typeof o=="number"?o:0);for(t=P(t,e),E(n,function(n,r,e){i[++u]={a:t(n,r,e),b:u,c:n}}),o=i.length,i.sort(r);o--;)i[o]=i[o].c;return i},t.tap=function(n,t){return t(n),n},t.throttle=function(n,t){function r(){a=new Date,i=null,u=n.apply(o,e)}var e,u,o,i,a=0;return function(){var f=new Date,l=t-(f-a);return e=arguments,o=this,0<l?i||(i=bt(r,l)):(gt(i),i=null,a=f,u=n.apply(o,e)),u
 }},t.times=function(n,t,r){for(var e=-1,u=Array(-1<n?n:0);++e<n;)u[e]=t.call(r,e);return u},t.toArray=function(n){return qt(n)?Bt.call(n):n&&typeof n.length=="number"?O(n):d(n)},t.union=function(n){return qt(n)||(arguments[0]=n?Bt.call(n):ct),z(ht.apply(ct,arguments))},t.uniq=z,t.values=d,t.where=q,t.without=function(n){return R(n,Bt.call(arguments,1))},t.wrap=function(n,t){return function(){var r=[n];return _t.apply(r,arguments),t.apply(this,r)}},t.zip=function(n){for(var t=-1,r=n?S(N(arguments,"length")):0,e=Array(0>r?0:r);++t<r;)e[t]=N(arguments,t);
-return e},t.chain=function(n){return n=new i(n),n.__chain__=!0,n},t.collect=O,t.drop=$,t.each=E,t.extend=c,t.methods=s,t.object=function(n,t){for(var r=-1,e=n?n.length:0,u={};++r<e;){var o=n[r];t?u[o]=t[r]:u[o[0]]=o[1]}return u},t.select=A,t.tail=$,t.unique=z,t.clone=function(n){return m(n)?qt(n)?Bt.call(n):c({},n):n},t.contains=j,t.escape=function(n){return null==n?"":(n+"").replace(Y,o)},t.every=w,t.find=x,t.findWhere=function(n,t){return q(n,t,!0)},t.has=function(n,t){return n?mt.call(n,t):!1},t.identity=U,t.indexOf=T,t.isArguments=l,t.isArray=qt,t.isBoolean=function(n){return!0===n||!1===n||dt.call(n)==rt
-},t.isDate=function(n){return n?typeof n=="object"&&dt.call(n)==et:!1},t.isElement=function(n){return n?1===n.nodeType:!1},t.isEmpty=g,t.isEqual=h,t.isFinite=function(n){return At(n)&&!xt(parseFloat(n))},t.isFunction=y,t.isNaN=function(n){return _(n)&&n!=+n},t.isNull=function(n){return null===n},t.isNumber=_,t.isObject=m,t.isRegExp=function(n){return!(!n||!ft[typeof n])&&dt.call(n)==it},t.isString=b,t.isUndefined=function(n){return typeof n=="undefined"},t.lastIndexOf=function(n,t,r){var e=n?n.length:0;
-for(typeof r=="number"&&(e=(0>r?Ot(0,e+r):St(r,e-1))+1);e--;)if(n[e]===t)return e;return-1},t.mixin=V,t.noConflict=function(){return n._=pt,this},t.random=function(n,t){null==n&&null==t&&(t=1),n=+n||0,null==t?(t=n,n=0):t=+t||0;var r=Nt();return n%1||t%1?n+St(r*(t-n+parseFloat("1e-"+((r+"").length-1))),t):n+yt(r*(t-n+1))},t.reduce=B,t.reduceRight=F,t.result=function(n,t){var r=n?n[t]:null;return y(r)?n[t]():r},t.size=function(n){var t=n?n.length:0;return typeof t=="number"?t:Rt(n).length},t.some=k,t.sortedIndex=I,t.template=function(n,r,e){n||(n=""),e=p({},e,t.templateSettings);
-var o=0,i="__p+='",a=e.variable;n.replace(RegExp((e.escape||X).source+"|"+(e.interpolate||X).source+"|"+(e.evaluate||X).source+"|$","g"),function(t,r,e,a,f){return i+=n.slice(o,f).replace(Z,u),r&&(i+="'+_['escape']("+r+")+'"),a&&(i+="';"+a+";__p+='"),e&&(i+="'+((__t=("+e+"))==null?'':__t)+'"),o=f+t.length,t}),i+="';\n",a||(a="obj",i="with("+a+"||{}){"+i+"}"),i="function("+a+"){var __t,__p='',__j=Array.prototype.join;function print(){__p+=__j.call(arguments,'')}"+i+"return __p}";try{var f=Function("_","return "+i)(t)
-}catch(l){throw l.source=i,l}return r?f(r):(f.source=i,f)},t.unescape=function(n){return null==n?"":(n+"").replace(Q,f)},t.uniqueId=function(n){var t=++J+"";return n?n+t:t},t.all=w,t.any=k,t.detect=x,t.foldl=B,t.foldr=F,t.include=j,t.inject=B,t.first=D,t.last=function(n,t,r){if(n){var e=0,u=n.length;if(typeof t!="number"&&null!=t){var o=u;for(t=P(t,r);o--&&t(n[o],o,n);)e++}else if(e=t,null==e||r)return n[u-1];return Bt.call(n,Ot(0,u-e))}},t.take=D,t.head=D,t.VERSION="1.2.1",V(t),t.prototype.chain=function(){return this.__chain__=!0,this
-},t.prototype.value=function(){return this.__wrapped__},E("pop push reverse shift sort splice unshift".split(" "),function(n){var r=ct[n];t.prototype[n]=function(){var n=this.__wrapped__;return r.apply(n,arguments),!kt.spliceObjects&&0===n.length&&delete n[0],this}}),E(["concat","join","slice"],function(n){var r=ct[n];t.prototype[n]=function(){var n=r.apply(this.__wrapped__,arguments);return this.__chain__&&(n=new i(n),n.__chain__=!0),n}}),typeof define=="function"&&typeof define.amd=="object"&&define.amd?(n._=t, define(function(){return t
-})):W&&!W.nodeType?G?(G.exports=t)._=t:W._=t:n._=t})(this);
+return e},t.collect=O,t.drop=$,t.each=E,t.extend=c,t.methods=s,t.object=function(n,t){for(var r=-1,e=n?n.length:0,u={};++r<e;){var o=n[r];t?u[o]=t[r]:u[o[0]]=o[1]}return u},t.select=A,t.tail=$,t.unique=z,t.chain=function(n){return n=new i(n),n.__chain__=!0,n},t.prototype.chain=function(){return this.__chain__=!0,this},t.clone=function(n){return m(n)?qt(n)?Bt.call(n):c({},n):n},t.contains=j,t.escape=function(n){return null==n?"":(n+"").replace(Y,o)},t.every=w,t.find=x,t.findWhere=function(n,t){return q(n,t,!0)
+},t.has=function(n,t){return n?mt.call(n,t):!1},t.identity=U,t.indexOf=T,t.isArguments=l,t.isArray=qt,t.isBoolean=function(n){return!0===n||!1===n||dt.call(n)==rt},t.isDate=function(n){return n?typeof n=="object"&&dt.call(n)==et:!1},t.isElement=function(n){return n?1===n.nodeType:!1},t.isEmpty=g,t.isEqual=h,t.isFinite=function(n){return At(n)&&!xt(parseFloat(n))},t.isFunction=y,t.isNaN=function(n){return _(n)&&n!=+n},t.isNull=function(n){return null===n},t.isNumber=_,t.isObject=m,t.isRegExp=function(n){return!(!n||!ft[typeof n])&&dt.call(n)==it
+},t.isString=b,t.isUndefined=function(n){return typeof n=="undefined"},t.lastIndexOf=function(n,t,r){var e=n?n.length:0;for(typeof r=="number"&&(e=(0>r?Ot(0,e+r):St(r,e-1))+1);e--;)if(n[e]===t)return e;return-1},t.mixin=V,t.noConflict=function(){return n._=pt,this},t.random=function(n,t){null==n&&null==t&&(t=1),n=+n||0,null==t?(t=n,n=0):t=+t||0;var r=Nt();return n%1||t%1?n+St(r*(t-n+parseFloat("1e-"+((r+"").length-1))),t):n+yt(r*(t-n+1))},t.reduce=B,t.reduceRight=F,t.result=function(n,t){var r=n?n[t]:null;
+return y(r)?n[t]():r},t.size=function(n){var t=n?n.length:0;return typeof t=="number"?t:Rt(n).length},t.some=k,t.sortedIndex=I,t.template=function(n,r,e){n||(n=""),e=p({},e,t.templateSettings);var o=0,i="__p+='",a=e.variable;n.replace(RegExp((e.escape||X).source+"|"+(e.interpolate||X).source+"|"+(e.evaluate||X).source+"|$","g"),function(t,r,e,a,f){return i+=n.slice(o,f).replace(Z,u),r&&(i+="'+_['escape']("+r+")+'"),a&&(i+="';"+a+";__p+='"),e&&(i+="'+((__t=("+e+"))==null?'':__t)+'"),o=f+t.length,t}),i+="';\n",a||(a="obj",i="with("+a+"||{}){"+i+"}"),i="function("+a+"){var __t,__p='',__j=Array.prototype.join;function print(){__p+=__j.call(arguments,'')}"+i+"return __p}";
+try{var f=Function("_","return "+i)(t)}catch(l){throw l.source=i,l}return r?f(r):(f.source=i,f)},t.unescape=function(n){return null==n?"":(n+"").replace(Q,f)},t.uniqueId=function(n){var t=++J+"";return n?n+t:t},t.all=w,t.any=k,t.detect=x,t.foldl=B,t.foldr=F,t.include=j,t.inject=B,t.first=D,t.last=function(n,t,r){if(n){var e=0,u=n.length;if(typeof t!="number"&&null!=t){var o=u;for(t=P(t,r);o--&&t(n[o],o,n);)e++}else if(e=t,null==e||r)return n[u-1];return Bt.call(n,Ot(0,u-e))}},t.take=D,t.head=D,t.VERSION="1.2.1",V(t),t.prototype.value=function(){return this.__wrapped__
+},E("pop push reverse shift sort splice unshift".split(" "),function(n){var r=ct[n];t.prototype[n]=function(){var n=this.__wrapped__;return r.apply(n,arguments),!kt.spliceObjects&&0===n.length&&delete n[0],this}}),E(["concat","join","slice"],function(n){var r=ct[n];t.prototype[n]=function(){var n=r.apply(this.__wrapped__,arguments);return this.__chain__&&(n=new i(n),n.__chain__=!0),n}}),typeof define=="function"&&typeof define.amd=="object"&&define.amd?(n._=t, define(function(){return t})):W&&!W.nodeType?G?(G.exports=t)._=t:W._=t:n._=t
+})(this);

lodash.js

@@ -5394,7 +5394,6 @@
     lodash.zipObject = zipObject;
 
     // add aliases
-    lodash.chain = lodash;
     lodash.collect = map;
     lodash.drop = rest;
     lodash.each = forEach;
@@ -5405,6 +5404,10 @@
     lodash.tail = rest;
     lodash.unique = uniq;
 
+    // add chain compat
+    lodash.chain = lodash;
+    lodash.prototype.chain = function() { return this; };
+
     // add functions to `lodash.prototype`
     mixin(lodash);
 

test/test.js

@@ -338,6 +338,23 @@
     });
   }());
 
+
+  /*--------------------------------------------------------------------------*/
+
+  QUnit.module('lodash.chain');
+
+  (function() {
+    test('should return a wrapped value', function() {
+      var actual = _.chain({ 'a': 0 });
+      ok(actual instanceof _);
+    });
+
+    test('should return the existing wrapper when chaining', function() {
+      var wrapper = _({ 'a': 0 });
+      equal(wrapper.chain(), wrapper);
+    });
+  }());
+
   /*--------------------------------------------------------------------------*/
 
   QUnit.module('cloning');