feat(isArrayLike): add support for currying

Also make tests consistent with the rest of the codebase

src/isArrayLike.js

@@ -1,4 +1,5 @@
 import { has } from 'ramda';
+import curry1 from 'ramda/src/internal/_curry1';
 
 import isArray from './isArray';
 import isString from './isString';
@@ -27,7 +28,7 @@ import isString from './isString';
  * RA.isArrayLike({0: 'zero', 9: 'nine', length: 10}); //=> true
  */
 /* eslint-enable max-len */
-const isArrayLike = val => {
+const isArrayLike = curry1(val => {
   if (isArray(val)) {
     return true;
   }
@@ -50,7 +51,7 @@ const isArrayLike = val => {
     return has(0, val) && has(val.length - 1, val);
   }
   return false;
-};
+});
 
 export default isArrayLike;
 

test/isArrayLike.js

@@ -1,14 +1,16 @@
+import * as R from 'ramda';
+
 import * as RA from '../src/index';
 import eq from './shared/eq';
 
 describe('isArrayLike', function() {
-  it('is true for Arrays', function() {
+  it('should return true for Arrays', function() {
     eq(RA.isArrayLike([]), true);
     eq(RA.isArrayLike([1, 2, 3, 4]), true);
     eq(RA.isArrayLike([null]), true);
   });
 
-  it('is true for arguments', function() {
+  it('should return true for arguments', function() {
     function testingFn() {
       return RA.isArrayLike(arguments);
     }
@@ -17,58 +19,45 @@ describe('isArrayLike', function() {
     eq(testingFn(null), true);
   });
 
-  it('is false for Strings', function() {
+  it('should return false for Strings', function() {
     eq(RA.isArrayLike(''), false);
     eq(RA.isArrayLike('abcdefg'), false);
   });
 
-  it('is true for arbitrary objects with numeric length, if extreme indices are defined', function() {
-    const obj1 = { length: 0 };
-    const obj2 = { 0: 'something', length: 0 };
-    const obj3 = { 0: void 0, length: 0 };
-    const obj4 = { 0: 'zero', 1: 'one', length: 2 };
-    const obj5 = { nodeType: 1, length: 2 };
-    const obj6 = { 0: 'zero', length: 2 };
-    const obj7 = { 1: 'one', length: 2 };
-
-    eq(RA.isArrayLike(obj1), true);
-    eq(RA.isArrayLike(obj2), true);
-    eq(RA.isArrayLike(obj3), true);
-    eq(RA.isArrayLike(obj4), true);
-    eq(RA.isArrayLike(obj5), true);
-    eq(RA.isArrayLike(obj6), false);
-    eq(RA.isArrayLike(obj7), false);
+  context('given extreme indices are defined', function() {
+    specify(
+      'should return true for arbitrary objects with numeric length',
+      function() {
+        const obj1 = { length: 0 };
+        const obj2 = { 0: 'something', length: 0 };
+        const obj3 = { 0: void 0, length: 0 };
+        const obj4 = { 0: 'zero', 1: 'one', length: 2 };
+        const obj5 = { nodeType: 1, length: 2 };
+        const obj6 = { 0: 'zero', length: 2 };
+        const obj7 = { 1: 'one', length: 2 };
+
+        eq(RA.isArrayLike(obj1), true);
+        eq(RA.isArrayLike(obj2), true);
+        eq(RA.isArrayLike(obj3), true);
+        eq(RA.isArrayLike(obj4), true);
+        eq(RA.isArrayLike(obj5), true);
+        eq(RA.isArrayLike(obj6), false);
+        eq(RA.isArrayLike(obj7), false);
+      }
+    );
   });
 
-  it('is false for everything else', function() {
+  it('should return false for everything else', function() {
     eq(RA.isArrayLike(undefined), false);
     eq(RA.isArrayLike(1), false);
     eq(RA.isArrayLike({}), false);
     eq(RA.isArrayLike(false), false);
     eq(RA.isArrayLike(function() {}), false);
   });
-});
-
-/**
- The MIT License (MIT)
 
- Copyright (c) 2013-2016 Scott Sauyet and Michael Hurley
+  it('should support placeholder to specify "gaps"', function() {
+    const isArrayLike = RA.isArrayLike(R.__);
 
- Permission is hereby granted, free of charge, to any person obtaining a copy
- of this software and associated documentation files (the "Software"), to deal
- in the Software without restriction, including without limitation the rights
- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- copies of the Software, and to permit persons to whom the Software is
- furnished to do so, subject to the following conditions:
-
- The above copyright notice and this permission notice shall be included in
- all copies or substantial portions of the Software.
-
- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- THE SOFTWARE.
- */
+    eq(isArrayLike([]), true);
+  });
+});