tests..

Author: amogorkon

.gitignore

@@ -1,3 +1,4 @@
+.hypothesis
 .cache
 __pycache__
 .ipynb_checkpoints/

fuzzy/functions.py

@@ -32,6 +32,12 @@
 from math import exp, log, sqrt
 
 
+def noop():
+    """Do nothing and return the value as is."""
+    def f(x):
+        return x
+    return f
+
 def inv(func):
     """Invert the given function within the unit-interval.
     >>> f = inv(constant(0))

test_fuzzy_units.py

@@ -3,6 +3,19 @@
 
 from fuzzy import functions as fun
 
+
+@given(st.floats(allow_nan=False, allow_infinity=False))
+def test_noop(x):
+    f = fun.noop()
+    assert f(x) == x
+
+@given(st.floats(min_value=0, max_value=1))
+def test_invert(x):
+    n = fun.noop()
+    f = fun.inv(n)
+    assert f(x) == 1 - x
+
+
 @given(st.floats(min_value=0, max_value=1), 
        st.floats(min_value=0, max_value=1))
 def test_constant(c, r):