Transition testing framework to pytest

Makefile

@@ -14,8 +14,8 @@ build27 build35 build36 build37 build38:
 	venv/bin/pre-commit install
 
 test:
-	rm -f .coverage
-	. venv/bin/activate && nosetests
+	rm -f .coverage coverage.xml
+	. venv/bin/activate && pytest
 
 lint:
 	venv/bin/pre-commit run --all-files --show-diff-on-failure
@@ -27,7 +27,7 @@ docs:
 clean:
 	rm -rf venv .tox ./**/__pycache__
 	rm -rf dist build .egg .eggs arrow.egg-info
-	rm -f ./**/*.pyc .coverage
+	rm -f ./**/*.pyc .coverage coverage.xml
 
 publish:
 	rm -rf dist build .egg .eggs arrow.egg-info

requirements.txt

@@ -1,10 +1,10 @@
 backports.functools_lru_cache==1.6.1; python_version == "2.7"
-chai==1.1.2
 dateparser==0.7.*
-mock==3.0.*
-nose==1.3.7
-nose-cov==1.6
 pre-commit==1.20.*
+pytest==4.6.*; python_version == "2.7"
+pytest==5.3.*; python_version >= "3.5"
+pytest-cov==2.8.*
+pytest-mock==2.0.*
 python-dateutil==2.8.*
 pytz==2019.*
 simplejson==3.16.*

setup.cfg

@@ -1,31 +1,15 @@
-[nosetests]
-where = tests
-verbosity = 2
-all-modules = true
-with-coverage = true
-cover-min-percentage = 100
-cover-package = arrow
-cover-erase = true
-
-[coverage:run]
-branch = true
-source =
-    arrow
-    tests
-
-[coverage:report]
-show_missing = true
-fail_under = 100
-
-[flake8]
-per-file-ignores = arrow/__init__.py:F401
-ignore = E203,E501,W503
+[tool:pytest]
+addopts = -v --cov-branch --cov=arrow tests --cov-fail-under=100 --cov-report=term-missing --cov-report=xml
 
 [tool:isort]
 line_length = 88
 multi_line_output = 3
 include_trailing_comma = true
-known_third_party = chai,dateparser,dateutil,mock,pytz,setuptools,simplejson
+known_third_party = dateparser,dateutil,pytest,pytz,setuptools,simplejson
+
+[flake8]
+per-file-ignores = arrow/__init__.py:F401
+ignore = E203,E501,W503
 
 [bdist_wheel]
 universal = 1

setup.py

@@ -27,8 +27,6 @@
         "python-dateutil",
         "backports.functools_lru_cache>=1.2.1;python_version=='2.7'",
     ],
-    test_suite="tests",
-    tests_require=["chai", "mock"],
     classifiers=[
         "Development Status :: 4 - Beta",
         "Intended Audience :: Developers",