Move spec/rubyspec to spec/ruby for consistency

* Other ruby implementations use the spec/ruby directory.
  [Misc #13792] [ruby-core:82287]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

spec/ruby/library/stringio/shared/each_byte.rb

@@ -0,0 +1,48 @@
+describe :stringio_each_byte, shared: true do
+  before :each do
+    @io = StringIO.new("xyz")
+  end
+
+  it "yields each character code in turn" do
+    seen = []
+    @io.send(@method) { |b| seen << b }
+    seen.should == [120, 121, 122]
+  end
+
+  it "updates the position before each yield" do
+    seen = []
+    @io.send(@method) { |b| seen << @io.pos }
+    seen.should == [1, 2, 3]
+  end
+
+  it "does not yield if the current position is out of bounds" do
+    @io.pos = 1000
+    seen = nil
+    @io.send(@method) { |b| seen = b }
+    seen.should be_nil
+  end
+
+  it "returns self" do
+    @io.send(@method) {}.should equal(@io)
+  end
+
+  it "returns an Enumerator when passed no block" do
+    enum = @io.send(@method)
+    enum.instance_of?(Enumerator).should be_true
+
+    seen = []
+    enum.each { |b| seen << b }
+    seen.should == [120, 121, 122]
+  end
+end
+
+describe :stringio_each_byte_not_readable, shared: true do
+  it "raises an IOError" do
+    io = StringIO.new("xyz", "w")
+    lambda { io.send(@method) { |b| b } }.should raise_error(IOError)
+
+    io = StringIO.new("xyz")
+    io.close_read
+    lambda { io.send(@method) { |b| b } }.should raise_error(IOError)
+  end
+end