implement smoketest robustness checks

test_robustness.py

@@ -0,0 +1,24 @@
+import stl
+import stl.robustness
+import pandas as pd
+from nose2.tools import params
+import unittest
+from sympy import Symbol
+
+oo = float('inf')
+
+ex1 = ("2*A > 3", -1)
+ex2 = ("F[0, 1](2*A > 3)", 5)
+ex3 = ("F[1, 0](2*A > 3)", -oo)
+ex4 = ("G[1, 0](2*A > 3)", oo)
+x = pd.DataFrame([[1,2], [1,4], [4,2]], index=[0,0.1,0.2], 
+                 columns=["A", "B"])
+
+
+
+class TestSTLRobustness(unittest.TestCase):
+    @params(ex1, ex2, ex3, ex4)
+    def test_stl(self, phi_str, r):
+        phi = stl.parse(phi_str)
+        stl_eval = stl.robustness.pointwise_robustness(phi)
+        self.assertEqual(stl_eval(x, 0), r)