1 files changed, 16 insertions, 2 deletions
diff --git a/mrbgems/mruby-string-ext/test/range.rb b/mrbgems/mruby-string-ext/test/range.rb
index 4b42cd3a6..80c286850 100644
--- a/mrbgems/mruby-string-ext/test/range.rb
+++ b/mrbgems/mruby-string-ext/test/range.rb
@@ -1,12 +1,26 @@
 assert('Range#max') do
-  # string Range depends on String#upto
+  # returns the maximum value in the range when called with no arguments
   assert_equal 'l', ('f'..'l').max
   assert_equal 'e', ('a'...'f').max
+
+  # returns nil when the endpoint is less than the start point
   assert_equal nil, ('z'..'l').max
 end
 
+assert('Range#max given a block') do
+  # returns nil when the endpoint is less than the start point
+  assert_equal nil, (('z'..'l').max { |x, y| x <=> y })
+end
+
 assert('Range#min') do
-  # string Range depends on String#upto
+  # returns the minimum value in the range when called with no arguments
   assert_equal 'f', ('f'..'l').min
+
+  # returns nil when the start point is greater than the endpoint
   assert_equal nil, ('z'..'l').min
 end
+
+assert('Range#min given a block') do
+  # returns nil when the start point is greater than the endpoint
+  assert_equal nil, (('z'..'l').min { |x, y| x <=> y })
+end