1 files changed, 29 insertions, 0 deletions
diff --git a/test/test_cfr.rb b/test/test_cfr.rb
new file mode 100644
index 0000000..3483c5a
--- /dev/null
+++ b/test/test_cfr.rb
@@ -0,0 +1,29 @@
+# -*- encoding: binary -*-
+require 'test/unit'
+require 'tempfile'
+$-w = true
+require 'sleepy_penguin'
+
+class TestCfr < Test::Unit::TestCase
+  def test_copy_file_range
+    str = 'abcde'
+    size = 5
+    src = Tempfile.new('ruby_cfr_src')
+    dst = Tempfile.new('ruby_cfr_dst')
+    assert_equal 5, src.syswrite(str)
+    src.sysseek(0)
+    begin
+      nr = SleepyPenguin.copy_file_range(src, nil, dst, nil, size, 0)
+    rescue Errno::EINVAL
+      warn 'copy_file_range not supported (requires Linux 4.5+)'
+      warn "We have: #{`uname -a`}"
+      return
+    end
+    assert_equal nr, 5
+    dst.sysseek(0)
+    assert_equal str, dst.sysread(5)
+  ensure
+    dst.close!
+    src.close!
+  end
+end if SleepyPenguin.respond_to?(:copy_file_range)