1 files changed, 92 insertions, 3 deletions
diff --git a/mrbgems/mruby-sprintf/test/sprintf.rb b/mrbgems/mruby-sprintf/test/sprintf.rb
index 7007df1fa..aedc2787a 100644
--- a/mrbgems/mruby-sprintf/test/sprintf.rb
+++ b/mrbgems/mruby-sprintf/test/sprintf.rb
@@ -1,8 +1,97 @@
-#assert('Kernel.sprintf') do
-#end
+assert('sprintf invalid') do
+  assert_raise(ArgumentError) { sprintf('%1$*d', 3) }
+  assert_raise(ArgumentError) { sprintf('%1$.*d', 3) }
+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 "1 one", "%d %s" % [ 1, "one" ]
   assert_equal "123 < 456", "%{num} < %<str>s" % { num: 123, str: "456" }
+  assert_equal 15, ("%b" % (1<<14)).size
+  skip unless Object.const_defined?(:Float)
+  assert_equal "1.0", "%3.1f" % 1.01
+  assert_equal " 12345.12", "% 4.2f" % 12345.1234
+  assert_equal "12345.12", "%-4.2f" % 12345.12345
+  assert_equal "+12345.12", "%+4.2f" % 12345.1234
+  assert_equal "12345.12", "%04.2f" % 12345.12345
+  assert_equal "0012345.12", "%010.2f" % 12345.1234
+end
+
+assert('String#% with inf') do
+  skip unless Object.const_defined?(:Float)
+  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
+  skip unless Object.const_defined?(:Float)
+  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#% %b") do
+  assert_equal("..10115", "%0b5" % -5)
+end
+
+assert("String#% %d") do
+  assert_equal("  10",   "%4d" % 10)
+  assert_equal("1000",   "%4d" % 1000)
+  assert_equal("10000",  "%4d" % 10000)
+end
+
+assert("String#% invalid format") do
+  assert_raise ArgumentError do
+    "%?" % ""
+  end
+end
+
+assert("String#% invalid format shared substring") do
+  fmt = ("x"*30+"%!")[0...-1]
+  assert_equal fmt, sprintf(fmt, "")
 end