Add hypothesis

.github/workflows/python-app.yml

@@ -24,7 +24,7 @@ jobs:
     - name: Update pip
       run: python -m pip install --upgrade pip
     - name: Install pytest
-      run: pip install 'pytest>=6.2.2'
+      run: pip install 'pytest>=6.2.2' 'hypothesis>=6.1.1' 'pytz>=2021.1'
     - name: pytest
       run: pytest -vv --tb=short
 
@@ -39,6 +39,6 @@ jobs:
     - name: Update pip
       run: python -m pip install --upgrade pip
     - name: Install mypy
-      run: python -m pip install --upgrade 'mypy>=0.800' 'pytest>=6.2.2'
+      run: python -m pip install --upgrade 'mypy>=0.800' 'pytest>=6.2.2' 'hypothesis>=6.1.1' 'pytz>=2021.1'
     - name: Lint with mypy
       run: mypy --strict iso8601

.gitignore

@@ -5,3 +5,4 @@ __pycache__
 build
 dist
 .vscode
+.hypothesis

iso8601/test_iso8601.py

@@ -4,11 +4,13 @@
 import copy
 import datetime
 import pickle
-import typing
 
+import hypothesis
+import hypothesis.strategies
+import hypothesis.extra.pytz
 import pytest
 
-from iso8601 import iso8601
+from . import iso8601
 
 
 def test_iso8601_regex() -> None:
@@ -257,3 +259,21 @@ def test_parse_valid_date(
     if isoformat:
         assert parsed.isoformat() == isoformat
     assert iso8601.parse_date(parsed.isoformat()) == parsed  # Test round trip
+
+
+@hypothesis.given(s=hypothesis.strategies.datetimes())
+def test_hypothesis_valid_naive_datetimes(s: datetime.datetime) -> None:
+    as_string = s.isoformat()
+    parsed = iso8601.parse_date(as_string, default_timezone=None)
+    print(f"{s!r} {as_string!r} {parsed!r}")
+    assert s == parsed
+
+
+@hypothesis.given(
+    s=hypothesis.strategies.datetimes(timezones=hypothesis.extra.pytz.timezones())
+)
+def test_hypothesis_valid_datetimes_with_timezone(s: datetime.datetime) -> None:
+    as_string = s.isoformat()
+    parsed = iso8601.parse_date(as_string)
+    print(f"{s!r} {as_string!r} {parsed!r}")
+    assert s == parsed

pyproject.toml

@@ -15,6 +15,8 @@ pylint = "^2.6.0"
 isort = "^5.7.0"
 tox = "^3.21.4"
 pytest = "^6.2.2"
+hypothesis = "^6.1.1"
+pytz = "^2021.1"
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]

tox.ini

@@ -14,7 +14,10 @@ python =
     pypy3: pypy3
 
 [testenv]
-deps=pytest>=6.2.2
+deps=
+    pytest>=6.2.2
+    hypothesis>=6.1.1
+    pytz>=2021.1
 commands=py.test -vv --tb=short iso8601
 setenv =
     LC_ALL=C