1 files changed, 38 insertions, 0 deletions
diff --git a/spec/ruby/library/stringio/each_char_spec.rb b/spec/ruby/library/stringio/each_char_spec.rb
new file mode 100644
index 0000000000..1db80c7d07
--- /dev/null
+++ b/spec/ruby/library/stringio/each_char_spec.rb
@@ -0,0 +1,38 @@
+require_relative '../../spec_helper'
+require 'stringio'
+
+describe "StringIO#each_char" do
+  before :each do
+    @io = StringIO.new("xyz äöü")
+  end
+
+  it "yields each character code in turn" do
+    seen = []
+    @io.each_char { |c| seen << c }
+    seen.should == ["x", "y", "z", " ", "ä", "ö", "ü"]
+  end
+
+  it "returns self" do
+    @io.each_char {}.should.equal?(@io)
+  end
+
+  it "returns an Enumerator when passed no block" do
+    enum = @io.each_char
+    enum.instance_of?(Enumerator).should == true
+
+    seen = []
+    enum.each { |c| seen << c }
+    seen.should == ["x", "y", "z", " ", "ä", "ö", "ü"]
+  end
+end
+
+describe "StringIO#each_char when self is not readable" do
+  it "raises an IOError" do
+    io = StringIO.new(+"xyz", "w")
+    -> { io.each_char { |b| b } }.should.raise(IOError)
+
+    io = StringIO.new("xyz")
+    io.close_read
+    -> { io.each_char { |b| b } }.should.raise(IOError)
+  end
+end