Add tests for type checks

I forgot to commit this file as part of
d3712e0 (PR #289).

nengo_spa/tests/test_typechecks.py

@@ -0,0 +1,23 @@
+import numpy as np
+
+from nengo_spa.typechecks import is_integer, is_number
+
+
+def test_is_integer():
+    assert is_integer(1)
+    assert is_integer(np.array(1))
+    assert not is_integer(np.array([1]))
+    assert not is_integer(1.0)
+    assert not is_integer(np.array(1.0))
+    assert not is_integer(np.array([1.0]))
+    assert not is_integer(object())
+
+
+def test_is_number():
+    assert is_number(1)
+    assert is_number(np.array(1))
+    assert is_number(1.0)
+    assert is_number(np.array(1.0))
+    assert not is_number(np.array([1.0]))
+    assert not is_number(np.array([1]))
+    assert not is_number(object())