1 files changed, 7 insertions, 0 deletions
diff --git a/mrbgems/mruby-string-ext/test/string.rb b/mrbgems/mruby-string-ext/test/string.rb
index a2153da39..87f0d1a96 100644
--- a/mrbgems/mruby-string-ext/test/string.rb
+++ b/mrbgems/mruby-string-ext/test/string.rb
@@ -165,3 +165,10 @@ end
 assert('String#chr') do
   assert_equal "a", "abcde".chr
 end
+
+assert('String#lines') do
+  assert_equal ["こん\n", "にちは\n", "世界!"], "こん\nにちは\n世界!".lines
+  assert_equal ["こん\n", "にちは\n", "世界!\n"], "こん\nにちは\n世界!\n".lines
+  assert_equal ["\n", "\n", "\n"], "\n\n\n".lines
+  assert_equal [], "".lines
+end