1 files changed, 24 insertions, 0 deletions
diff --git a/spec/ruby/core/io/fsync_spec.rb b/spec/ruby/core/io/fsync_spec.rb
new file mode 100644
index 0000000000..0317cbc805
--- /dev/null
+++ b/spec/ruby/core/io/fsync_spec.rb
@@ -0,0 +1,24 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+
+describe "IO#fsync" do
+  before :each do
+    @name = tmp("io_fsync.txt")
+    ScratchPad.clear
+  end
+
+  after :each do
+    rm_r @name
+  end
+
+  it "raises an IOError on closed stream" do
+    -> { IOSpecs.closed_io.fsync }.should.raise(IOError)
+  end
+
+  it "writes the buffered data to permanent storage" do
+    File.open(@name, "w") do |f|
+      f.write "one hit wonder"
+      f.fsync.should == 0
+    end
+  end
+end