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-rw-r--r--test/ruby/test_io.rb9
1 files changed, 9 insertions, 0 deletions
diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index f1fc3233b6..d877f5e832 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -2112,5 +2112,14 @@ End
f1.ioctl(0x80045200, entropy_count)
}
end
+
+ buf = ''
+ assert_nothing_raised do
+ fionread = 0x541B
+ File.open(__FILE__){|f1|
+ f1.ioctl(fionread, buf)
+ }
+ end
+ assert_equal(File.size(__FILE__), buf.unpack('i!')[0])
end
end