copy test/zlib/test_zlib.rb from trunk.

add test for [ruby-dev:24103], [ruby-dev:24190], [ruby-dev:24191],
[ruby-dev:24194], [ruby-dev:24197], [ruby-dev:24202], [ruby-dev:24213],
[ruby-dev:24223] and [ruby-dev:24228].


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@6867 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/digest/test_digest.rb

@@ -88,4 +88,10 @@ class TestDigest < Test::Unit::TestCase
       assert_equal(md1, md2, algo)
     end
   end
+
+  def test_instance_eval # [ruby-dev:24202]
+    assert_nothing_raised {
+      Digest::SHA1.new.instance_eval { update "a" }
+    }
+  end
 end

test/ruby/test_eval.rb

@@ -119,4 +119,39 @@ class TestEval < Test::Unit::TestCase
     assert_equal(5, p1.call)
     assert_nil(i7)
   end
+
+  def test_nil_instance_eval_cvar # [ruby-dev:24103]
+    def nil.test_binding
+      binding
+    end
+    bb = eval("nil.instance_eval \"binding\"", nil.test_binding)
+    assert_raise(NameError) { eval("@@a", bb) }
+    class << nil
+      remove_method :test_binding
+    end
+  end
+
+  def test_fixnum_instance_eval_cvar # [ruby-dev:24213]
+    assert_raise(NameError) { 1.instance_eval "@@a" }
+  end
+
+  def test_cvar_scope_with_instance_eval # [ruby-dev:24223]
+    Fixnum.class_eval "@@test_cvar_scope_with_instance_eval = 1" # depends on [ruby-dev:24229]
+    @@test_cvar_scope_with_instance_eval = 4
+    assert_equal(4, 1.instance_eval("@@test_cvar_scope_with_instance_eval"))
+    Fixnum.__send__(:remove_class_variable, :@@test_cvar_scope_with_instance_eval)
+  end
+
+  def test_eval_and_define_method # [ruby-dev:24228]
+    assert_nothing_raised {
+      def temporally_method_for_test_eval_and_define_method(&block)
+        lambda {
+          class << Object.new; self end.__send__(:define_method, :zzz, &block)
+        }
+      end
+      v = eval("temporally_method_for_test_eval_and_define_method {}")
+      {}[0] = {}
+      v.call
+    }
+  end
 end

test/ruby/test_file.rb

@@ -47,4 +47,24 @@ class TestFile < Test::Unit::TestCase
     assert(true, File.fnmatch('\[1\]' , '[1]'))
     assert(true, File.fnmatch('*?', 'a'))
   end
+
+  def test_truncate_wbuf # [ruby-dev:24191]
+    f = Tempfile.new("test-truncate")
+    f.puts "abc"
+    f.truncate(0)
+    f.puts "def"
+    f.close
+    assert_equal("\0\0\0\0def\n", File.read(f.path))
+  end
+
+  def test_truncate_rbuf # [ruby-dev:24197]
+    f = Tempfile.new("test-truncate")
+    f.puts "abc"
+    f.puts "def"
+    f.close
+    f.open
+    assert_equal("abc\n", f.gets)
+    f.truncate(3)
+    assert_equal(nil, f.gets)
+  end
 end

test/stringio/test_stringio.rb

@@ -14,4 +14,20 @@ class TestStringIO < Test::Unit::TestCase
   alias open_file_rw open_file
 
   include TestEOF::Seek
+
+  def test_truncate # [ruby-dev:24190]
+    io = StringIO.new("")
+    io.puts "abc"
+    io.truncate(0)
+    io.puts "def"
+    assert_equal("\0\0\0def\n", io.string)
+  end
+
+  def test_seek_beyond_eof # [ruby-dev:24194]
+    io = StringIO.new
+    n = 100
+    io.seek(n)
+    io.print "last"
+    assert_equal("\0" * n + "last", io.string)
+  end
 end