1 files changed, 37 insertions, 0 deletions
diff --git a/spec/ruby/core/dir/fileno_spec.rb b/spec/ruby/core/dir/fileno_spec.rb
new file mode 100644
index 0000000000..3b563eb18f
--- /dev/null
+++ b/spec/ruby/core/dir/fileno_spec.rb
@@ -0,0 +1,37 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/common'
+
+has_dir_fileno = begin
+  dir = Dir.new('.')
+  dir.fileno
+  true
+rescue NotImplementedError
+  false
+rescue Exception
+  true
+ensure
+  dir.close
+end
+
+describe "Dir#fileno" do
+  before :each do
+    @name = tmp("fileno")
+    mkdir_p @name
+    @dir = Dir.new(@name)
+  end
+
+  after :each do
+    @dir.close
+    rm_r @name
+  end
+
+  if has_dir_fileno
+    it "returns the file descriptor of the dir" do
+      @dir.fileno.should.is_a?(Integer)
+    end
+  else
+    it "raises an error when not implemented on the platform" do
+      -> { @dir.fileno }.should.raise(NotImplementedError)
+    end
+  end
+end