Benchmarks added

tests/roots_test.py

@@ -0,0 +1,19 @@
+import numpy as np
+import pyerrors as pe
+import pytest
+
+np.random.seed(0)
+
+
+def test_root_linear():
+
+    def root_function(x, d):
+        return x - d
+
+    value = np.random.normal(0, 100)
+    my_obs = pe.pseudo_Obs(value, 0.1, 't')
+    my_root = pe.roots.find_root(my_obs, root_function)
+
+    assert np.isclose(my_root.value, value)
+    difference = my_obs - my_root
+    assert difference.is_zero()