Use a more modern approach to run tests (#1089)

Running tests through `python setup.py test` is deprecated:

> WARNING: Testing via this command is deprecated and will be removed
> in a future version. Users looking for a generic test entry point
> independent of test runner are encouraged to use tox.

I am not in favor of moving back to `tox`, we should simply run tests
using `python -m pytest` (or `make test`) and that's it.

A new extra was added, `dev`, to install development requirements:

    $ python -m pip install --upgrade --editable '.[dev]'

.github/workflows/build.yml

@@ -30,5 +30,5 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
       - run: python -m pip install --upgrade pip setuptools wheel
-      - run: python -m pip install --upgrade --editable .
-      - run: python setup.py test
+      - run: python -m pip install --upgrade '.[dev]'
+      - run: python -m pytest --verbose ./httpie ./tests

CONTRIBUTING.rst

@@ -193,7 +193,7 @@ Install HTTPie in editable mode with all the dependencies:
 
 .. code-block:: powershell
 
-    python -m pip install --upgrade --editable . -r requirements-dev.txt
+    python -m pip install --upgrade --editable '.[dev]'
 
 You should now see ``(httpie)`` next to your shell prompt, and
 the ``http`` command should point to your development copy:

Makefile

@@ -6,7 +6,6 @@
 
 ROOT_DIR:=$(shell dirname $(realpath $(firstword $(MAKEFILE_LIST))))
 VERSION=$(shell grep __version__ httpie/__init__.py)
-REQUIREMENTS=requirements-dev.txt
 H1="\n\n\033[0;32m\#\#\# "
 H1END=" \#\#\# \033[0m\n"
 
@@ -28,7 +27,7 @@ all: uninstall-httpie install test
 
 install: venv
 	@echo $(H1)Installing dev requirements$(H1END)
-	$(VENV_PIP) install --upgrade -r $(REQUIREMENTS)
+	$(VENV_PIP) install --upgrade --editable '.[dev]'
 
 	@echo $(H1)Installing HTTPie$(H1END)
 	$(VENV_PIP) install --upgrade --editable .
@@ -123,7 +122,7 @@ pycodestyle: codestyle
 
 codestyle:
 	@echo $(H1)Running flake8$(H1END)
-	@[ -f $(VENV_BIN)/flake8 ] || $(VENV_PIP) install --upgrade -r $(REQUIREMENTS)
+	@[ -f $(VENV_BIN)/flake8 ] || $(VENV_PIP) install --upgrade --editable '.[dev]'
 	$(VENV_BIN)/flake8 httpie/ tests/ extras/ *.py
 	@echo
 

requirements-dev.txt

@@ -1,11 +0,0 @@
-flake8
-flake8-comprehensions
-flake8-deprecated
-flake8-mutable
-flake8-tuple
-pytest
-pytest-cov
-pytest-httpbin>=0.0.6
-docutils
-wheel
-twine

setup.py

@@ -4,39 +4,26 @@ import sys
 import codecs
 
 from setuptools import setup, find_packages
-from setuptools.command.test import test as TestCommand
 
 import httpie
 
-
-class PyTest(TestCommand):
-    """
-    Running `$ python setup.py test' simply installs minimal requirements
-    and runs the tests with no fancy stuff like parallel execution.
-
-    """
-
-    def finalize_options(self):
-        TestCommand.finalize_options(self)
-        self.test_args = [
-            '--doctest-modules',
-            '--verbose',
-            './httpie',
-            './tests',
-        ]
-        self.test_suite = True
-
-    def run_tests(self):
-        import pytest
-        sys.exit(pytest.main(self.test_args))
-
-
+# Note: keep requirements here to ease distributions packaging
 tests_require = [
-    'pytest-httpbin',
+    'docutils',
     'pytest',
+    'pytest-httpbin>=0.0.6',
+]
+dev_require = [
+    *tests_require,
+    'flake8',
+    'flake8-comprehensions',
+    'flake8-deprecated',
+    'flake8-mutable',
+    'flake8-tuple',
+    'pytest-cov',
+    'twine',
+    'wheel',
 ]
-
-
 install_requires = [
     'requests[socks]>=2.22.0',
     'Pygments>=2.5.2',
@@ -59,6 +46,7 @@ if 'bdist_wheel' not in sys.argv:
 
 # bdist_wheel
 extras_require = {
+    'dev': dev_require,
     'test': tests_require,
     # https://wheel.readthedocs.io/en/latest/#defining-conditional-dependencies
     ':sys_platform == "win32"': install_requires_win_only,
@@ -91,8 +79,6 @@ setup(
     python_requires='>=3.6',
     extras_require=extras_require,
     install_requires=install_requires,
-    tests_require=tests_require,
-    cmdclass={'test': PyTest},
     classifiers=[
         'Development Status :: 5 - Production/Stable',
         'Programming Language :: Python',