Fix Issue #231

lib/common/common_helper.rb

@@ -118,8 +118,10 @@ def get_equal_string_end(stringarray = [''])
   already_found = ''
   looping = true
   counter = -1
+  # remove nils (# Issue #231)
+  stringarray = stringarray.compact
   if stringarray.kind_of? Array and stringarray.length > 1
-    base = stringarray[0]
+    base = stringarray.first
     while looping
       character = base[counter, 1]
       stringarray.each do |s|

spec/lib/common/common_helper_spec.rb

@@ -20,6 +20,21 @@ describe 'common_helper' do
       @expected = ''
     end
 
+    it 'returns an empty string' do
+      @input    = ['asdf', nil]
+      @expected = ''
+    end
+
+    it 'returns an empty string' do
+      @input    = [nil, 'asdf']
+      @expected = ''
+    end
+
+    it 'returns asdf' do
+      @input    = [nil, 'a asdf', nil, 'b asdf']
+      @expected = ' asdf'
+    end
+
     it 'returns asdf' do
       @input    = ['kjh asdf', 'oijr asdf']
       @expected = ' asdf'