From c7f62d407f69157610eb66f81426df2efd6ff692 Mon Sep 17 00:00:00 2001
From: Michael Orlitzky <michael@orlitzky.com>
Date: Mon, 4 Jul 2011 13:52:37 -0400
Subject: [PATCH] Add tests to ensure that the zero function and a trilinear
 function are reproduced correctly.

---
 src/Tests/Grid.hs | 40 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 39 insertions(+), 1 deletion(-)

diff --git a/src/Tests/Grid.hs b/src/Tests/Grid.hs
index fbe8bc1..e6bd8d0 100644
--- a/src/Tests/Grid.hs
+++ b/src/Tests/Grid.hs
@@ -6,8 +6,10 @@ import Test.HUnit
 import Test.QuickCheck
 
 import Assertions
+import Comparisons
 import Cube
 import Examples
+import FunctionValues (value_at)
 import Grid
 import Tetrahedron
 
@@ -307,6 +309,40 @@ test_trilinear_f0_t0_v3 =
         t = tetrahedron0 cube
 
 
+test_trilinear_reproduced :: Test
+test_trilinear_reproduced =
+    TestCase $ assertTrue "trilinears are reproduced correctly" $
+             and [p (i', j', k') ~= value_at trilinear i j k
+                    | i <- [0..2],
+                      j <- [0..2],
+                      k <- [0..2],
+                      let i' = fromIntegral i,
+                      let j' = fromIntegral j,
+                      let k' = fromIntegral k]
+    where
+      g = make_grid 1 trilinear
+      c0 = fromJust $ cube_at g 1 1 1
+      t0 = tetrahedron0 c0
+      p = polynomial t0
+
+
+test_zeros_reproduced :: Test
+test_zeros_reproduced =
+    TestCase $ assertTrue "the zero function is reproduced correctly" $
+             and [p (i', j', k') ~= value_at zeros i j k
+                    | i <- [0..2],
+                      j <- [0..2],
+                      k <- [0..2],
+                      let i' = fromIntegral i,
+                      let j' = fromIntegral j,
+                      let k' = fromIntegral k]
+    where
+      g = make_grid 1 zeros
+      c0 = fromJust $ cube_at g 1 1 1
+      t0 = tetrahedron0 c0
+      p = polynomial t0
+
+
 -- | A list of all HUnit tests defined in this module.
 grid_tests :: [Test]
 grid_tests =
@@ -333,4 +369,6 @@ grid_tests =
      test_trilinear_f0_t0_v0,
      test_trilinear_f0_t0_v1,
      test_trilinear_f0_t0_v2,
-     test_trilinear_f0_t0_v3]
+     test_trilinear_f0_t0_v3,
+     test_trilinear_reproduced,
+     test_zeros_reproduced]
-- 
2.43.2