1 files changed, 67 insertions, 1 deletions
diff --git a/mrbgems/mruby-sprintf/test/sprintf.rb b/mrbgems/mruby-sprintf/test/sprintf.rb
index 178904d60..84dba9d19 100644
--- a/mrbgems/mruby-sprintf/test/sprintf.rb
+++ b/mrbgems/mruby-sprintf/test/sprintf.rb
@@ -8,6 +8,62 @@ assert('String#%') do
   assert_equal 15, ("%b" % (1<<14)).size
 end
 
+assert('String#% with inf') do
+  inf = Float::INFINITY
+
+  assert_equal "Inf", "%f" % inf
+  assert_equal "Inf", "%2f" % inf
+  assert_equal "Inf", "%3f" % inf
+  assert_equal " Inf", "%4f" % inf
+  assert_equal "  Inf", "%5f" % inf
+
+  assert_equal "+Inf", "%+f" % inf
+  assert_equal "+Inf", "%+2f" % inf
+  assert_equal "+Inf", "%+3f" % inf
+  assert_equal "+Inf", "%+4f" % inf
+  assert_equal " +Inf", "%+5f" % inf
+
+  assert_equal "Inf", "%-f" % inf
+  assert_equal "Inf", "%-2f" % inf
+  assert_equal "Inf", "%-3f" % inf
+  assert_equal "Inf ", "%-4f" % inf
+  assert_equal "Inf  ", "%-5f" % inf
+
+  assert_equal " Inf", "% f" % inf
+  assert_equal " Inf", "% 2f" % inf
+  assert_equal " Inf", "% 3f" % inf
+  assert_equal " Inf", "% 4f" % inf
+  assert_equal "  Inf", "% 5f" % inf
+end
+
+assert('String#% with nan') do
+  nan = Float::NAN
+
+  assert_equal "NaN", "%f" % nan
+  assert_equal "NaN", "%2f" % nan
+  assert_equal "NaN", "%3f" % nan
+  assert_equal " NaN", "%4f" % nan
+  assert_equal "  NaN", "%5f" % nan
+
+  assert_equal "+NaN", "%+f" % nan
+  assert_equal "+NaN", "%+2f" % nan
+  assert_equal "+NaN", "%+3f" % nan
+  assert_equal "+NaN", "%+4f" % nan
+  assert_equal " +NaN", "%+5f" % nan
+
+  assert_equal "NaN", "%-f" % nan
+  assert_equal "NaN", "%-2f" % nan
+  assert_equal "NaN", "%-3f" % nan
+  assert_equal "NaN ", "%-4f" % nan
+  assert_equal "NaN  ", "%-5f" % nan
+
+  assert_equal " NaN", "% f" % nan
+  assert_equal " NaN", "% 2f" % nan
+  assert_equal " NaN", "% 3f" % nan
+  assert_equal " NaN", "% 4f" % nan
+  assert_equal "  NaN", "% 5f" % nan
+end
+
 assert("String#% with invalid chr") do
   begin
     class Fixnum
@@ -19,7 +75,7 @@ assert("String#% with invalid chr") do
     end
 
     assert_raise TypeError do
-      "%c" % 0
+      "%c" % 0x80
     end
   ensure
     class Fixnum
@@ -31,6 +87,16 @@ assert("String#% with invalid chr") do
   end
 end
 
+assert("String#% %b") do
+  assert_equal("..10115", "%0b5" % -5)
+end
+
+assert("String#% %d") do
+  assert_equal("  10",   "%4d" % 10)
+  assert_equal("1000",   "%4d" % 1000)
+  assert_equal("100000", "%4d" % 100000)
+end
+
 assert("String#% invalid format") do
   assert_raise ArgumentError do
     "%?" % ""