content: -- Copyright 2016 TensorFlow authors.
  --
  -- Licensed under the Apache License, Version 2.0 (the "License");
  -- you may not use this file except in compliance with the License.
  -- You may obtain a copy of the License at
  --
  --     http://www.apache.org/licenses/LICENSE-2.0
  --
  -- Unless required by applicable law or agreed to in writing, software
  -- distributed under the License is distributed on an "AS IS" BASIS,
  -- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  -- See the License for the specific language governing permissions and
  -- limitations under the License.
  
  {-# LANGUAGE OverloadedStrings #-}
  
  module TensorFlow.Test
      ( assertAllClose
      ) where
  
  import qualified Data.Vector as V
  import Test.HUnit ((@?))
  import Test.HUnit.Lang (Assertion)
  -- | Compares that the vectors are element-by-element equal within the given
  -- tolerance. Raises an assertion and prints some information if not.
  assertAllClose :: V.Vector Float -> V.Vector Float -> Assertion
  assertAllClose xs ys = all (<= tol) (V.zipWith absDiff xs ys) @?
      "Difference > tolerance: \nxs: " ++ show xs ++ "\nys: " ++ show ys
          ++ "\ntolerance: " ++ show tol
    where
        absDiff x y = abs (x - y)
        tol = 0.001 :: Float
  