5 files changed, 33 insertions, 0 deletions
diff --git a/test/ruby/test_m17n.rb b/test/ruby/test_m17n.rb
index a09dcc8f3b..6f319b2b02 100644
--- a/test/ruby/test_m17n.rb
+++ b/test/ruby/test_m17n.rb
@@ -1233,4 +1233,13 @@ class TestM17N < Test::Unit::TestCase
     s.setbyte(-4, 0x84)
     assert_equal(u("\xE3\x81\x84\xE3\x81\x84"), s)
   end
+
+  def test_compatible
+    assert_equal(nil, Encoding.compatible?("",0), "moved from btest/knownbug")
+  end
+
+  def test_force_encoding
+    assert(("".center(1, "\x80".force_encoding("utf-8")); true),
+           "moved from btest/knownbug, [ruby-dev:33807]")
+  end
 end
diff --git a/test/ruby/test_proc.rb b/test/ruby/test_proc.rb
index 3c1ea76420..ee53eeaf3a 100644
--- a/test/ruby/test_proc.rb
+++ b/test/ruby/test_proc.rb
@@ -210,6 +210,18 @@ class TestProc < Test::Unit::TestCase
     assert_equal(fib, [1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89])
   end
 
+  def test_curry_from_knownbug
+    a = lambda {|x, y, &b| b }
+    b = a.curry[1]
+
+    assert_equal(:ok,
+      if b.call(2){} == nil
+        :ng
+      else
+        :ok
+      end, 'moved from btest/knownbug, [ruby-core:15551]')
+  end
+
   def test_dup_clone
     b = proc {|x| x + "bar" }
     class << b; attr_accessor :foo; end
diff --git a/test/ruby/test_sprintf.rb b/test/ruby/test_sprintf.rb
index ecb4ed1208..cad9f5e031 100644
--- a/test/ruby/test_sprintf.rb
+++ b/test/ruby/test_sprintf.rb
@@ -185,6 +185,7 @@ class TestSprintf < Test::Unit::TestCase
   def test_float
     assert_equal("36893488147419111424",
                  sprintf("%20.0f", 36893488147419107329.0))
+    assert_equal(" Inf", sprintf("% 0e", 1.0/0.0), "moved from btest/knownbug")
   end
 
   BSIZ = 120
diff --git a/test/ruby/test_string.rb b/test/ruby/test_string.rb
index 648287a677..10e49708f5 100644
--- a/test/ruby/test_string.rb
+++ b/test/ruby/test_string.rb
@@ -624,6 +624,8 @@ class TestString < Test::Unit::TestCase
     a.taint
     assert(a.gsub(/./, S('X')).tainted?)
 
+    assert_equal("z", "abc".gsub(/./, "a" => "z"), "moved from btest/knownbug")
+
     assert_raise(ArgumentError) { "foo".gsub }
   end
 
@@ -1063,6 +1065,9 @@ class TestString < Test::Unit::TestCase
     assert_equal([S("a"), S(""), S("b"), S("c"), S("")], S("a||b|c|").split(S('|'), -1))
 
     assert_equal([], "".split(//, 1))
+
+    assert_equal("[2, 3]", [1,2,3].slice!(1,10000).inspect, "moved from btest/knownbug")
+
   end
 
   def test_squeeze
diff --git a/test/ruby/test_struct.rb b/test/ruby/test_struct.rb
index cbb0c1405e..6c0e1f4fb2 100644
--- a/test/ruby/test_struct.rb
+++ b/test/ruby/test_struct.rb
@@ -206,4 +206,10 @@ class TestStruct < Test::Unit::TestCase
     o = klass.new(1)
     assert_equal(1, o.size)
   end
+
+  def test_error
+    assert_raise(TypeError){
+      Struct.new(0)
+    }
+  end
 end