1 files changed, 6 insertions, 0 deletions
diff --git a/mrbgems/mruby-enum-ext/test/enum.rb b/mrbgems/mruby-enum-ext/test/enum.rb
index 68f2781b7..daf737d37 100644
--- a/mrbgems/mruby-enum-ext/test/enum.rb
+++ b/mrbgems/mruby-enum-ext/test/enum.rb
@@ -129,3 +129,9 @@ assert("Enumerable#cycle") do
   assert_equal ["a", "b", "c", "a", "b", "c"], a
   assert_raise(TypeError) { ["a", "b", "c"].cycle("a") { |v| a << v } }
 end
+
+assert("Enumerable#find_index") do
+  assert_nil (1..10).find_index { |i| i % 5 == 0 and i % 7 == 0 }
+  assert_equal 34, (1..100).find_index { |i| i % 5 == 0 and i % 7 == 0 }
+  assert_equal 49 ,(1..100).find_index(50)
+end