fix: STRF-9673 Lodash removal, part 3 (#245)

Author: jairo-bc

helpers/3p/array.js

@@ -26,7 +26,7 @@ var helpers = module.exports;
  */
 
 helpers.after = function(array, n) {
-  if (utils.isUndefined(array)) {return '';}
+  if (!array || utils.isUndefined(array)) {return '';}
   return array.slice(n);
 };
 

helpers/pluck.js

@@ -2,7 +2,7 @@
 
 const factory = () => {
     return function(collection, path) {
-        if (collection) {
+        if (collection && Array.isArray(collection)) {
             return collection.map(item => item.hasOwnProperty(path) ? item[path] : undefined);
         }
         return [];

helpers/truncate.js

@@ -25,7 +25,7 @@ const substring = require('stringz').substring;
  */
 const factory = globals => {
     return function(string, length) {
-        if (typeof string !== 'string') {
+        if (typeof string !== 'string' || string.length === 0) {
             return string;
         }
 

spec/helpers/3p/array.js

@@ -37,6 +37,12 @@ describe('array', function() {
       done();
     });
 
+    it('should return all of the items in an array after the specified count.', function(done) {
+      var fn = hbs.compile('{{after notArray 5}}');
+      expect(fn(context)).to.equal('');
+      done();
+    });
+  
     it('should return all of the items in an array after the specified count.', function(done) {
       var fn = hbs.compile('{{after array 5}}');
       expect(fn(context)).to.equal(['f', 'g', 'h'].toString());

spec/helpers/truncate.js

@@ -11,6 +11,8 @@ describe('truncate helper', function() {
         spanish_string: 'mañana',
         string: 'hello world',
         unicode_string: 'She ❤️️ this',
+        empty_string: '',
+        null: null,
     };
 
     const runTestCases = testRunner({context});
@@ -55,6 +57,24 @@ describe('truncate helper', function() {
         ], done);
     });
 
+    it('should handle empty strings', function(done) {
+        runTestCases([
+            {
+                input: '{{truncate empty_string 5}}',
+                output: '',
+            },
+        ], done);
+    });
+
+    it('should handle null object', function(done) {
+        runTestCases([
+            {
+                input: '{{truncate null 5}}',
+                output: '',
+            },
+        ], done);
+    });
+
     it('should handle unicode strings', function(done) {
         runTestCases([
             {