extract Just related duplicated code (ramda#3276)

* Use Maybe.Just and Maybe.Nothing instead

* import Just, Nothing directly from Maybe.js

Author: zydmayday

test/difference.js

@@ -1,5 +1,6 @@
 var R = require('../source/index.js');
 var eq = require('./shared/eq.js');
+var {Just} = require('./shared/Maybe.js');
 
 
 describe('difference', function() {
@@ -18,11 +19,6 @@ describe('difference', function() {
   });
 
   it('has R.equals semantics', function() {
-    function Just(x) { this.value = x; }
-    Just.prototype.equals = function(x) {
-      return x instanceof Just && R.equals(x.value, this.value);
-    };
-
     eq(R.difference([0], [-0]).length, 1);
     eq(R.difference([-0], [0]).length, 1);
     eq(R.difference([NaN], [NaN]).length, 0);

test/dropRepeats.js

@@ -1,5 +1,6 @@
 var R = require('../source/index.js');
 var eq = require('./shared/eq.js');
+var {Just} = require('./shared/Maybe.js');
 
 
 describe('dropRepeats', function() {
@@ -21,11 +22,6 @@ describe('dropRepeats', function() {
   });
 
   it('has R.equals semantics', function() {
-    function Just(x) { this.value = x; }
-    Just.prototype.equals = function(x) {
-      return x instanceof Just && R.equals(x.value, this.value);
-    };
-
     eq(R.dropRepeats([0, -0]).length, 2);
     eq(R.dropRepeats([-0, 0]).length, 2);
     eq(R.dropRepeats([NaN, NaN]).length, 1);

test/eqBy.js

@@ -1,5 +1,6 @@
 var R = require('../source/index.js');
 var eq = require('./shared/eq.js');
+var {Just} = require('./shared/Maybe.js');
 
 
 describe('eqBy', function() {
@@ -13,11 +14,6 @@ describe('eqBy', function() {
   });
 
   it('has R.equals semantics', function() {
-    function Just(x) { this.value = x; }
-    Just.prototype.equals = function(x) {
-      return x instanceof Just && R.equals(x.value, this.value);
-    };
-
     eq(R.eqBy(R.identity, 0, -0), false);
     eq(R.eqBy(R.identity, -0, 0), false);
     eq(R.eqBy(R.identity, NaN, NaN), true);

test/eqProps.js

@@ -1,5 +1,6 @@
 var R = require('../source/index.js');
 var eq = require('./shared/eq.js');
+var {Just} = require('./shared/Maybe.js');
 
 
 describe('eqProps', function() {
@@ -9,11 +10,6 @@ describe('eqProps', function() {
   });
 
   it('has R.equals semantics', function() {
-    function Just(x) { this.value = x; }
-    Just.prototype.equals = function(x) {
-      return x instanceof Just && R.equals(x.value, this.value);
-    };
-
     eq(R.eqProps('value', {value: 0}, {value: -0}), false);
     eq(R.eqProps('value', {value: -0}, {value: 0}), false);
     eq(R.eqProps('value', {value: NaN}, {value: NaN}), true);

test/filter.js

@@ -1,6 +1,6 @@
 var R = require('../source/index.js');
 var eq = require('./shared/eq.js');
-var Maybe = require('./shared/Maybe.js');
+var {Just} = require('./shared/Maybe.js');
 
 
 describe('filter', function() {
@@ -33,7 +33,7 @@ describe('filter', function() {
   });
 
   it('correctly uses fantasy-land implementations', function() {
-    var m1 = Maybe.Just(-1);
+    var m1 = Just(-1);
     var m2 = R.filter(function(x) { return x > 0; } , m1);
 
     eq(m2.isNothing, true);

test/includes.js

@@ -1,5 +1,6 @@
 var R = require('../source/index.js');
 var eq = require('./shared/eq.js');
+var {Just} = require('./shared/Maybe.js');
 
 
 describe('includes', function() {
@@ -16,11 +17,6 @@ describe('includes', function() {
   });
 
   it('has R.equals semantics', function() {
-    function Just(x) { this.value = x; }
-    Just.prototype.equals = function(x) {
-      return x instanceof Just && R.equals(x.value, this.value);
-    };
-
     eq(R.includes(0, [-0]), false);
     eq(R.includes(-0, [0]), false);
     eq(R.includes(NaN, [NaN]), true);

test/indexOf.js

@@ -1,5 +1,6 @@
 var R = require('../source/index.js');
 var eq = require('./shared/eq.js');
+var {Just} = require('./shared/Maybe.js');
 
 
 describe('indexOf', function() {
@@ -46,11 +47,6 @@ describe('indexOf', function() {
   });
 
   it('has R.equals semantics', function() {
-    function Just(x) { this.value = x; }
-    Just.prototype.equals = function(x) {
-      return x instanceof Just && R.equals(x.value, this.value);
-    };
-
     eq(R.indexOf(0, [-0]), -1);
     eq(R.indexOf(-0, [0]), -1);
     eq(R.indexOf(NaN, [NaN]), 0);

test/intersection.js

@@ -1,5 +1,6 @@
 var R = require('../source/index.js');
 var eq = require('./shared/eq.js');
+var {Just} = require('./shared/Maybe.js');
 
 
 describe('intersection', function() {
@@ -24,11 +25,6 @@ describe('intersection', function() {
   });
 
   it('has R.equals semantics', function() {
-    function Just(x) { this.value = x; }
-    Just.prototype.equals = function(x) {
-      return x instanceof Just && R.equals(x.value, this.value);
-    };
-
     eq(R.intersection([0], [-0]).length, 0);
     eq(R.intersection([-0], [0]).length, 0);
     eq(R.intersection([NaN], [NaN]).length, 1);

test/lastIndexOf.js

@@ -1,5 +1,6 @@
 var R = require('../source/index.js');
 var eq = require('./shared/eq.js');
+var {Just} = require('./shared/Maybe.js');
 
 
 describe('lastIndexOf', function() {
@@ -37,11 +38,6 @@ describe('lastIndexOf', function() {
   });
 
   it('has R.equals semantics', function() {
-    function Just(x) { this.value = x; }
-    Just.prototype.equals = function(x) {
-      return x instanceof Just && R.equals(x.value, this.value);
-    };
-
     eq(R.lastIndexOf(0, [-0]), -1);
     eq(R.lastIndexOf(-0, [0]), -1);
     eq(R.lastIndexOf(NaN, [NaN]), 0);

test/lift.js

@@ -1,7 +1,7 @@
 
 var R = require('../source/index.js');
 var eq = require('./shared/eq.js');
-var Maybe = require('./shared/Maybe.js');
+var {Just} = require('./shared/Maybe.js');
 
 var not = function(x) { return !x; };
 var add3 = R.curry(function add3(a, b, c) {
@@ -40,7 +40,7 @@ describe('lift', function() {
 
   it('works with other functors such as "Maybe"', function() {
     var addM = R.lift(R.add);
-    eq(addM(Maybe.Just(3), Maybe.Just(5)), Maybe.Just(8));
+    eq(addM(Just(3), Just(5)), Just(8));
   });
 
 });