1 files changed, 92 insertions, 0 deletions
diff --git a/test/ruby/test_io_m17n.rb b/test/ruby/test_io_m17n.rb
index 6f823c85a3..b9c88ab647 100644
--- a/test/ruby/test_io_m17n.rb
+++ b/test/ruby/test_io_m17n.rb
@@ -2222,4 +2222,96 @@ EOT
       end
     end
   end if /mswin|mingw/ =~ RUBY_PLATFORM
+
+  def test_read_with_length
+    with_tmpdir {
+      str = "a\nb"
+      generate_file("tmp", str)
+      open("tmp", "r") do |f|
+        assert_equal(str, f.read(3))
+      end
+    }
+  end if /mswin|mingw/ =~ RUBY_PLATFORM
+
+  def test_read_with_length_binmode
+    with_tmpdir {
+      str = "a\r\nb\r\nc\r\n\r\n"
+      generate_file("tmp", str)
+      open("tmp", "r") do |f|
+        # read with length should be binary mode
+        assert_equal("a\r\n", f.read(3)) # binary
+        assert_equal("b\nc\n\n", f.read) # text
+      end
+    }
+  end if /mswin|mingw/ =~ RUBY_PLATFORM
+
+  def test_gets_and_read_with_binmode
+    with_tmpdir {
+      str = "a\r\nb\r\nc\r\n\n\r\n"
+      generate_file("tmp", str)
+      open("tmp", "r") do |f|
+        assert_equal("a\n", f.gets)      # text
+        assert_equal("b\r\n", f.read(3)) # binary
+        assert_equal("c\r\n", f.read(3)) # binary
+        assert_equal("\n\n", f.read)     # text
+      end
+    }
+  end if /mswin|mingw/ =~ RUBY_PLATFORM
+
+  def test_getc_and_read_with_binmode
+    with_tmpdir {
+      str = "a\r\nb\r\nc\n\n\r\n\r\n"
+      generate_file("tmp", str)
+      open("tmp", "r") do |f|
+        assert_equal("a", f.getc)         # text
+        assert_equal("\n", f.getc)        # text
+        assert_equal("b\r\n", f.read(3))  # binary
+        assert_equal("c\n\n\n\n", f.read) # text
+      end
+    }
+  end if /mswin|mingw/ =~ RUBY_PLATFORM
+
+  def test_read_with_binmode_and_gets
+    with_tmpdir {
+      str = "a\r\nb\r\nc\r\n\r\n"
+      open("tmp", "wb") { |f| f.write str }
+      open("tmp", "r") do |f|
+        assert_equal("a", f.getc)         # text
+        assert_equal("\n", f.getc)        # text
+        assert_equal("b\r\n", f.read(3))  # binary
+        assert_equal("c\n", f.gets)       # text
+        assert_equal("\n", f.gets)        # text
+      end
+    }
+  end
+
+  def test_read_with_binmode_and_getc
+    with_tmpdir {
+      str = "a\r\nb\r\nc\r\n\r\n"
+      open("tmp", "wb") { |f| f.write str }
+      open("tmp", "r") do |f|
+        assert_equal("a", f.getc)         # text
+        assert_equal("\n", f.getc)        # text
+        assert_equal("b\r\n", f.read(3))  # binary
+        assert_equal("c", f.getc)         # text
+        assert_equal("\n", f.getc)        # text
+        assert_equal("\n", f.getc)        # text
+      end
+    }
+  end
+
+  def test_read_write_with_binmode
+    with_tmpdir {
+      str = "a\r\n"
+      generate_file("tmp", str)
+      open("tmp", "r+") do |f|
+        assert_equal("a\r\n", f.read(3))  # binary
+        f.write("b\n\n");                 # text
+        f.rewind
+        assert_equal("a\nb\n\n", f.read)  # text
+        f.rewind
+        assert_equal("a\r\nb\r\n\r\n", f.binmode.read) # binary
+      end
+    }
+  end if /mswin|mingw/ =~ RUBY_PLATFORM
 end