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-rw-r--r--mrbgems/mruby-sprintf/test/sprintf.rb4
1 files changed, 4 insertions, 0 deletions
diff --git a/mrbgems/mruby-sprintf/test/sprintf.rb b/mrbgems/mruby-sprintf/test/sprintf.rb
index ff2c88081..2c4a7f7a9 100644
--- a/mrbgems/mruby-sprintf/test/sprintf.rb
+++ b/mrbgems/mruby-sprintf/test/sprintf.rb
@@ -87,6 +87,10 @@ assert("String#% with invalid chr") do
end
end
+assert("String#% %b") do
+ assert_equal("..10115", "%0b5" % -5)
+end
+
assert("String#% invalid format") do
assert_raise ArgumentError do
"%?" % ""