Address edge case for number_to_human with units option.

ActiveSupport::NumberHelper#number_to_human now returns the number unaltered when
the units hash does not contain the needed key, e.g. when the number provided is less
than the largest key provided.

1 files changed, 5 insertions, 0 deletions

diff --git a/actionpack/test/template/number_helper_test.rb b/actionpack/test/template/number_helper_test.rb
index d8fffe75ed..6a2d5aef18 100644
--- a/actionpack/test/template/number_helper_test.rb
+++ b/actionpack/test/template/number_helper_test.rb
@@ -266,6 +266,11 @@ class NumberHelperTest < ActionView::TestCase
     assert_equal '100&lt;script&gt;&lt;/script&gt;000 Quadrillion', number_to_human(10**20, :delimiter => "<script></script>")
   end
 
+  def test_number_to_human_with_custom_units_that_are_missing_the_needed_key
+    assert_equal '123', number_to_human(123, :units => {:thousand => 'k'})
+    assert_equal '123', number_to_human(123, :units => {})
+  end
+
   def test_number_to_human_with_custom_format
     assert_equal '123 times Thousand', number_to_human(123456, :format => "%n times %u")
     volume = {:unit => "ml", :thousand => "lt", :million => "m3"}