From 7bb164120be5078642c180f4bd20d7629ce38313 Mon Sep 17 00:00:00 2001
From: Fabian Joswig <fabian.joswig@ed.ac.uk>
Date: Fri, 20 Jan 2023 11:44:31 +0000
Subject: [PATCH] tests: fuzzy test for Obs added, test dependencies and
 documentation updated.

---
 .github/workflows/pytest.yml | 1 +
 CONTRIBUTING.md              | 4 +++-
 pyerrors/obs.py              | 1 +
 setup.py                     | 2 +-
 tests/obs_test.py            | 6 ++++++
 5 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
index 536f7d53..5321d1ae 100644
--- a/.github/workflows/pytest.yml
+++ b/.github/workflows/pytest.yml
@@ -40,6 +40,7 @@ jobs:
           pip install pytest
           pip install pytest-cov
           pip install pytest-benchmark
+          pip install hypothesis
           pip install py
           pip freeze
 
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 98ab0c75..8d803e4a 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -25,7 +25,9 @@ For all pull requests tests are executed for the most recent python releases via
 pytest -vv --cov=pyerrors
 pytest -vv --nbmake examples/*.ipynb
 ```
-requiring `pytest`, `pytest-cov`, `pytest-benchmark` and `nbmake`. To get a coverage report in html run
+requiring `pytest`, `pytest-cov`, `pytest-benchmark`, `hypothesis' and `nbmake`. To install the test dependencies one can run `pip install pyerrors[test]`
+
+To get a coverage report in html run
 ```
 pytest --cov=pyerrors --cov-report html
 ```
diff --git a/pyerrors/obs.py b/pyerrors/obs.py
index 9df6b5c2..d56e34ea 100644
--- a/pyerrors/obs.py
+++ b/pyerrors/obs.py
@@ -10,6 +10,7 @@ import matplotlib.pyplot as plt
 from scipy.stats import skew, skewtest, kurtosis, kurtosistest
 import numdifftools as nd
 from itertools import groupby
+from hypothesis import given, strategies as st
 from .covobs import Covobs
 
 # Improve print output of numpy.ndarrays containing Obs objects.
diff --git a/setup.py b/setup.py
index 3aa4d889..6ad29512 100644
--- a/setup.py
+++ b/setup.py
@@ -26,7 +26,7 @@ setup(name='pyerrors',
       packages=find_packages(),
       python_requires='>=3.7.0',
       install_requires=['numpy>=1.19', 'autograd>=1.5', 'numdifftools>=0.9.41', 'matplotlib>=3.5', 'scipy>=1.7', 'iminuit>=2.17', 'h5py>=3.7', 'lxml>=4.9', 'python-rapidjson>=1.9', 'pandas>=1.1'],
-      extras_require={'test': ['pytest', 'pytest-cov', 'pytest-benchmark']},
+      extras_require={'test': ['pytest', 'pytest-cov', 'pytest-benchmark', 'hypothesis']},
       classifiers=[
           'Development Status :: 5 - Production/Stable',
           'Intended Audience :: Science/Research',
diff --git a/tests/obs_test.py b/tests/obs_test.py
index 5fbedf98..aa6372d8 100644
--- a/tests/obs_test.py
+++ b/tests/obs_test.py
@@ -4,9 +4,15 @@ import copy
 import matplotlib.pyplot as plt
 import pyerrors as pe
 import pytest
+from hypothesis import given, strategies as st
 
 np.random.seed(0)
 
+@given(st.lists(st.floats(allow_nan=False, allow_infinity=False, width=32), min_size=5), st.text())
+def test_fuzzy_obs(data, string):
+    my_obs = pe.Obs([data], [string])
+    my_obs * my_obs
+
 
 def test_Obs_exceptions():
     with pytest.raises(Exception):