1 files changed, 11 insertions, 2 deletions
diff --git a/test/test_wbuf.rb b/test/test_wbuf.rb
index 0eacb08..0d7959c 100644
--- a/test/test_wbuf.rb
+++ b/test/test_wbuf.rb
@@ -71,8 +71,17 @@ class TestWbuf < Testcase
        end while true
      end
      wbuf = Yahns::Wbuf.new([], true, Dir.tmpdir, :wait_writable)
-    assert_equal :wait_writable, wbuf.wbuf_write(a, buf)
-    assert_equal :wait_writable, wbuf.wbuf_flush(a)
+
+    rv1 = wbuf.wbuf_write(a, buf)
+    rv2 = wbuf.wbuf_flush(a)
+    case rv1
+    when nil
+      assert_equal true, rv2, 'some kernels succeed with real sendfile'
+    when :wait_writable
+      assert_equal :wait_writable, rv2, 'some block on sendfile'
+    else
+      flunk "unexpected from wbuf_write/flush: #{rv1.inspect} / #{rv2.inspect}"
+    end
  
      # drain the buffer
      Timeout.timeout(10) { b.read(b.nread) until b.nread == 0 }