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diff --git a/testsuite/tests/lib/Numeric/num002.hs b/testsuite/tests/lib/Numeric/num002.hs
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+++ b/testsuite/tests/lib/Numeric/num002.hs
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+-- Testing showInt, lightly.
+
+module Main(main) where
+
+import Numeric
+
+showSignedInt :: Integral a => a -> String
+showSignedInt x = showSigned (showInt) 0 x ""
+
+main =
+ do
+ putStrLn (showInt (343023920121::Integer) [])
+ putStrLn (showInt (3430239::Int) [])
+ putStrLn (showInt (1212 :: Int) [])
+ putStrLn (showSignedInt (591125662431 `div` (517::Int)))
+ -- showInt just works over naturals, wrap it up inside
+ -- a use of Numeric.showSigned to show negative nums.
+ putStrLn (showSignedInt (-111::Int))
+ putStrLn (showInt (232189458241::Integer) [])
+