1 files changed, 24 insertions, 0 deletions
diff --git a/spec/ruby/core/io/readbyte_spec.rb b/spec/ruby/core/io/readbyte_spec.rb
new file mode 100644
index 0000000000..07da1da919
--- /dev/null
+++ b/spec/ruby/core/io/readbyte_spec.rb
@@ -0,0 +1,24 @@
+require_relative '../../spec_helper'
+
+describe "IO#readbyte" do
+  before :each do
+    @io = File.open(__FILE__, 'r')
+  end
+
+  after :each do
+    @io.close
+  end
+
+  it "reads one byte from the stream" do
+    byte = @io.readbyte
+    byte.should == ?r.getbyte(0)
+    @io.pos.should == 1
+  end
+
+  it "raises EOFError on EOF" do
+    @io.seek(999999)
+    -> do
+      @io.readbyte
+    end.should.raise EOFError
+  end
+end