1 files changed, 46 insertions, 0 deletions
diff --git a/spec/rubyspec/library/stringio/getch_spec.rb b/spec/rubyspec/library/stringio/getch_spec.rb
new file mode 100644
index 0000000000..c7fdfe9080
--- /dev/null
+++ b/spec/rubyspec/library/stringio/getch_spec.rb
@@ -0,0 +1,46 @@
+# -*- encoding: utf-8 -*-
+require File.expand_path('../../../spec_helper', __FILE__)
+require 'stringio'
+require File.expand_path('../shared/getc', __FILE__)
+
+# This method is added by io/console on require.
+describe "StringIO#getch" do
+  require 'io/console'
+
+  it_behaves_like :stringio_getc, :getch
+
+  it "returns the charactor at the current position" do
+    io = StringIO.new("example")
+
+    io.send(@method).should == ?e
+    io.send(@method).should == ?x
+    io.send(@method).should == ?a
+  end
+
+  with_feature :encoding do
+    it "increments #pos by the byte size of the character in multibyte strings" do
+      io = StringIO.new("föóbar")
+
+      io.send(@method); io.pos.should == 1 # "f" has byte size 1
+      io.send(@method); io.pos.should == 3 # "ö" has byte size 2
+      io.send(@method); io.pos.should == 5 # "ó" has byte size 2
+      io.send(@method); io.pos.should == 6 # "b" has byte size 1
+    end
+  end
+
+  it "returns nil at the end of the string" do
+    # empty string case
+    io = StringIO.new("")
+    io.send(@method).should == nil
+    io.send(@method).should == nil
+
+    # non-empty string case
+    io = StringIO.new("a")
+    io.send(@method) # skip one
+    io.send(@method).should == nil
+  end
+
+  describe "StringIO#getch when self is not readable" do
+    it_behaves_like :stringio_getc_not_readable, :getch
+  end
+end