Merge branch 'iij-pr-string-percent'

2 files changed, 16 insertions, 2 deletions

diff --git a/mrbgems/mruby-sprintf/mrblib/string.rb b/mrbgems/mruby-sprintf/mrblib/string.rb
new file mode 100644
index 000000000..f8bd3b02e
--- /dev/null
+++ b/mrbgems/mruby-sprintf/mrblib/string.rb
@@ -0,0 +1,9 @@
+class String
+  def %(args)
+    if args.is_a? Hash
+      sprintf(self, args)
+    else
+      sprintf(self, *args)
+    end
+  end
+end
diff --git a/mrbgems/mruby-sprintf/test/sprintf.rb b/mrbgems/mruby-sprintf/test/sprintf.rb
index 52e94fb83..7007df1fa 100644
--- a/mrbgems/mruby-sprintf/test/sprintf.rb
+++ b/mrbgems/mruby-sprintf/test/sprintf.rb
@@ -1,3 +1,8 @@
-##
-# Kernel#sprintf Kernel#format Test
+#assert('Kernel.sprintf') do
+#end
 
+assert('String#%') do
+  assert_equal "one=1", "one=%d" % 1
+  assert_equal "1 one 1.0", "%d %s %3.1f" % [ 1, "one", 1.01 ]
+  assert_equal "123 < 456", "%{num} < %<str>s" % { num: 123, str: "456" }
+end