app.py

from pyramid.config import Configurator


def hello(request):
    return dict(message="Hello, world!")


def main(global_conf, **settings):
    config = Configurator(settings=settings)
    config.include("pyramid_jinja2")
    config.add_jinja2_renderer(".html")
    config.add_view(hello, renderer="./hello.html")
    return config.make_wsgi_app()


if __name__ == '__main__':
    import argparse
    import waitress
    parser = argparse.ArgumentParser()
    parser.add_argument("-p", "--port", type=int, default=8080)
    parser.add_argument("--host", type=str, default="0.0.0.0")
    args = parser.parse_args()
    app = main({})
    waitress.serve(app, port=args.port, host=args.host)

hello.html

{{ message }}

requirements.txt

pyramid
pyramid-jinja2
waitress
pytest
webtest

test_it.py

from pyramid import testing


def test_hello():
    from app import hello
    request = testing.DummyRequest()
    result = hello(request)
    assert result == {"message": "Hello, world!"}


def test_app():
    import webtest
    from app import main
    settings = {}
    app = webtest.TestApp(main({}, **settings))
    res = app.get("/")
    assert "Hello, world!" in res