Add unit tests for GSL interpolation module

1 files changed, 4 insertions, 1 deletions

diff --git a/packages/tests/src/Numeric/LinearAlgebra/Tests/Properties.hs b/packages/tests/src/Numeric/LinearAlgebra/Tests/Properties.hs
index 720b7bd..046644f 100644
--- a/packages/tests/src/Numeric/LinearAlgebra/Tests/Properties.hs
+++ b/packages/tests/src/Numeric/LinearAlgebra/Tests/Properties.hs
@@ -14,7 +14,7 @@ Testing properties.
 -}
 
 module Numeric.LinearAlgebra.Tests.Properties (
-    dist, (|~|), (~~), (~:), Aprox((:~)),
+    dist, (|~|), (~~), (~:), Aprox((:~)), (~=),
     zeros, ones,
     square,
     unitary,
@@ -45,6 +45,9 @@ module Numeric.LinearAlgebra.Tests.Properties (
 import Numeric.LinearAlgebra.HMatrix hiding (Testable,unitary)
 import Test.QuickCheck
 
+(~=) :: Double -> Double -> Bool
+a ~= b = abs (a - b) < 1e-10
+
 trivial :: Testable a => Bool -> a -> Property
 trivial = (`classify` "trivial")