test: add unittests for clough tocher interpolator

Author: kshitij-maths

tests/test_clough_tocher.py

@@ -0,0 +1,41 @@
+import numpy as np
+import pytest
+
+from ezyrb import CloughTocher
+
+np.random.seed(17)
+
+def get_xy():
+    npts = 20
+    dinput = 2
+
+    inp = np.random.uniform(-1, 1, size=(npts, dinput))
+    out = np.array([
+        np.sin(inp[:, 0]) + np.sin(inp[:, 1]**2),
+        np.cos(inp[:, 0]) + np.cos(inp[:, 1]**2)
+    ]).T
+
+    return inp, out
+
+class TestCloughTocher:
+    def test_constructor_empty(self):
+        model = CloughTocher()
+
+    def test_fit(self):
+        x, y = get_xy()
+        approx = CloughTocher()
+        approx.fit(x, y)
+
+    def test_predict_01(self):
+        x, y = get_xy()
+        approx = CloughTocher() 
+        approx.fit(x, y)
+        test_y = approx.predict(x)
+        np.testing.assert_array_almost_equal(y, test_y, decimal=6)
+
+    def test_wrong_dimensions(self):
+        x = np.random.uniform(-1, 1, size=(10, 3))
+        y = np.random.uniform(-1, 1, size=(10, 2))
+        approx = CloughTocher()
+        with pytest.raises(ValueError):
+            approx.fit(x, y)

tests/test_parallel/test_clough_tocher.py

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+import pytest
+
+import ezyrb
+from ezyrb.parallel import ReducedOrderModel as ParallelROM
+ezyrb.ReducedOrderModel = ParallelROM
+
+from tests.test_clough_tocher import *