X-Git-Url: http://gitweb.michael.orlitzky.com/?a=blobdiff_plain;f=src%2FTests%2FGrid.hs;h=e6bd8d0542058a9aef5f3ae20a40b251e7b59691;hb=7c648d2c1ca966c4ba1dfff08a13100f065d5dbf;hp=6fdbb133a6ee70a4b6a6259493b58aee2d8ab939;hpb=76ff394c3e5a551e2a6bbf51fbee4e91b90b1611;p=spline3.git

diff --git a/src/Tests/Grid.hs b/src/Tests/Grid.hs
index 6fdbb13..e6bd8d0 100644
--- a/src/Tests/Grid.hs
+++ b/src/Tests/Grid.hs
@@ -6,7 +6,10 @@ import Test.HUnit
 import Test.QuickCheck
 
 import Assertions
+import Comparisons
 import Cube
+import Examples
+import FunctionValues (value_at)
 import Grid
 import Tetrahedron
 
@@ -18,20 +21,6 @@ instance Arbitrary Grid where
       return (make_grid h' fvs)
 
 
--- | Values of the function f(x,y,z) = 1 + x + xy + xyz taken at nine
---   points (hi, hj, jk) with h = 1. From example one in the paper.
---   Used in the next bunch of tests.
-trilinear :: [[[Double]]]
-trilinear = [ [ [ 1, 2, 3 ],
-                [ 1, 3, 5 ],
-                [ 1, 4, 7 ] ],
-              [ [ 1, 2, 3 ],
-                [ 1, 4, 7 ],
-                [ 1, 6, 11 ] ],
-              [ [ 1, 2, 3 ],
-                [ 1, 5, 9 ],
-                [ 1, 8, 15 ]]]
-
 -- | Check the value of c0030 for tetrahedron0 belonging to the
 --   cube centered on (1,1,1) with a grid constructed from the
 --   trilinear values. See example one in the paper.
@@ -320,6 +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 =
@@ -346,4 +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]