1 files changed, 51 insertions, 0 deletions
diff --git a/spec/ruby/core/exception/io_error_spec.rb b/spec/ruby/core/exception/io_error_spec.rb
new file mode 100644
index 0000000000..0971be332f
--- /dev/null
+++ b/spec/ruby/core/exception/io_error_spec.rb
@@ -0,0 +1,51 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "IOError" do
+  it "is a superclass of EOFError" do
+    IOError.should be_ancestor_of(EOFError)
+  end
+end
+
+describe "IO::EAGAINWaitReadable" do
+  it "combines Errno::EAGAIN and IO::WaitReadable" do
+    IO::EAGAINWaitReadable.superclass.should == Errno::EAGAIN
+    IO::EAGAINWaitReadable.ancestors.should include IO::WaitReadable
+  end
+
+  it "is the same as IO::EWOULDBLOCKWaitReadable if Errno::EAGAIN is the same as Errno::EWOULDBLOCK" do
+    if Errno::EAGAIN.equal? Errno::EWOULDBLOCK
+      IO::EAGAINWaitReadable.should equal IO::EWOULDBLOCKWaitReadable
+    else
+      IO::EAGAINWaitReadable.should_not equal IO::EWOULDBLOCKWaitReadable
+    end
+  end
+end
+
+describe "IO::EWOULDBLOCKWaitReadable" do
+  it "combines Errno::EWOULDBLOCK and IO::WaitReadable" do
+    IO::EWOULDBLOCKWaitReadable.superclass.should == Errno::EWOULDBLOCK
+    IO::EAGAINWaitReadable.ancestors.should include IO::WaitReadable
+  end
+end
+
+describe "IO::EAGAINWaitWritable" do
+  it "combines Errno::EAGAIN and IO::WaitWritable" do
+    IO::EAGAINWaitWritable.superclass.should == Errno::EAGAIN
+    IO::EAGAINWaitWritable.ancestors.should include IO::WaitWritable
+  end
+
+  it "is the same as IO::EWOULDBLOCKWaitWritable if Errno::EAGAIN is the same as Errno::EWOULDBLOCK" do
+    if Errno::EAGAIN.equal? Errno::EWOULDBLOCK
+      IO::EAGAINWaitWritable.should equal IO::EWOULDBLOCKWaitWritable
+    else
+      IO::EAGAINWaitWritable.should_not equal IO::EWOULDBLOCKWaitWritable
+    end
+  end
+end
+
+describe "IO::EWOULDBLOCKWaitWritable" do
+  it "combines Errno::EWOULDBLOCK and IO::WaitWritable" do
+    IO::EWOULDBLOCKWaitWritable.superclass.should == Errno::EWOULDBLOCK
+    IO::EAGAINWaitWritable.ancestors.should include IO::WaitWritable
+  end
+end