How to use pluggy - 10 common examples

def test_passes():
                pass
        """
        )
        result = testdir.runpytest()
        verinfo = ".".join(map(str, sys.version_info[:3]))
        result.stdout.fnmatch_lines(
            [
                "*===== test session starts ====*",
                "platform %s -- Python %s*pytest-%s*py-%s*pluggy-%s"
                % (
                    sys.platform,
                    verinfo,
                    pytest.__version__,
                    py.__version__,
                    pluggy.__version__,
                ),
                "*test_header_trailer_info.py .*",
                "=* 1 passed*in *.[0-9][0-9]s *=",
            ]
        )
        if request.config.pluginmanager.list_plugin_distinfo():
            result.stdout.fnmatch_lines(["plugins: *"])

def test_passes():
                pass
        """
        )
        result = testdir.runpytest()
        verinfo = ".".join(map(str, sys.version_info[:3]))
        result.stdout.fnmatch_lines(
            [
                "*===== test session starts ====*",
                "platform %s -- Python %s*pytest-%s*py-%s*pluggy-%s"
                % (
                    sys.platform,
                    verinfo,
                    pytest.__version__,
                    py.__version__,
                    pluggy.__version__,
                ),
                "*test_header_trailer_info.py .*",
                "=* 1 passed*in *.[0-9][0-9] seconds *=",
            ]
        )
        if pytest.config.pluginmanager.list_plugin_distinfo():
            result.stdout.fnmatch_lines(["plugins: *"])

def test_passes():
                pass
        """
        )
        result = testdir.runpytest()
        verinfo = ".".join(map(str, sys.version_info[:3]))
        result.stdout.fnmatch_lines(
            [
                "*===== test session starts ====*",
                "platform %s -- Python %s*pytest-%s*py-%s*pluggy-%s"
                % (
                    sys.platform,
                    verinfo,
                    pytest.__version__,
                    py.__version__,
                    pluggy.__version__,
                ),
                "*test_header_trailer_info.py .*",
                "=* 1 passed*in *.[0-9][0-9] seconds *=",
            ]
        )
        if request.config.pluginmanager.list_plugin_distinfo():
            result.stdout.fnmatch_lines(["plugins: *"])

import pytest
from pluggy import PluginValidationError, HookimplMarker, HookspecMarker


hookspec = HookspecMarker("example")
hookimpl = HookimplMarker("example")


def test_happypath(pm):
    class Api(object):
        @hookspec
        def hello(self, arg):
            "api hook 1"

    pm.add_hookspecs(Api)
    hook = pm.hook
    assert hasattr(hook, 'hello')
    assert repr(hook.hello).find("hello") != -1

    class Plugin(object):
        @hookimpl
        def hello(self, arg):

            @HookimplMarker("flaskbb")
            def flaskbb_settings_updated(self, user, settings_update):
                post_processor.post_process_changeset(
                    user=user, settings_update=settings_update
                )

def test_parse_hookimpl_override():
    class MyPluginManager(PluginManager):
        def parse_hookimpl_opts(self, module_or_class, name):
            opts = PluginManager.parse_hookimpl_opts(self, module_or_class, name)
            if opts is None:
                if name.startswith("x1"):
                    opts = {}
            return opts

    class Plugin:
        def x1meth(self):
            pass

        @hookimpl(hookwrapper=True, tryfirst=True)
        def x1meth2(self):
            pass

    class Spec:

def test_warning_on_call_vs_hookspec_arg_mismatch():
    """Verify that is a hook is called with less arguments then defined in the
    spec that a warning is emitted.
    """
    class Spec:
        @hookspec
        def myhook(self, arg1, arg2):
            pass

    class Plugin:
        @hookimpl
        def myhook(self, arg1):
            pass

    pm = PluginManager(hookspec.project_name)
    pm.register(Plugin())
    pm.add_hookspecs(Spec())

    with warnings.catch_warnings(record=True) as warns:
        warnings.simplefilter('always')

        # calling should trigger a warning
        pm.hook.myhook(arg1=1)

        assert len(warns) == 1
        warning = warns[-1]
        assert issubclass(warning.category, Warning)
        assert "Argument(s) ('arg2',)" in str(warning.message)

def myhook(self, arg1, arg2):
        print("inside Plugin_1.myhook()")
        return arg1 + arg2


class Plugin_2(object):
    """A 2nd hook implementation namespace.
    """
    @hookimpl
    def myhook(self, arg1, arg2):
        print("inside Plugin_2.myhook()")
        return arg1 - arg2


# create a manager and add the spec
pm = pluggy.PluginManager("myproject")
pm.add_hookspecs(MySpec)

# register plugins
pm.register(Plugin_1())
pm.register(Plugin_2())

# call our `myhook` hook
results = pm.hook.myhook(arg1=1, arg2=2)
print(results)

import pluggy

hookspec = pluggy.HookspecMarker("eggsample")


@hookspec
def eggsample_add_ingredients(ingredients: tuple):
    """Have a look at the ingredients and offer your own.

    :param ingredients: the ingredients, don't touch them!
    :return: a list of ingredients
    """


@hookspec
def eggsample_prep_condiments(condiments: dict):
    """Reorganize the condiments tray to your heart's content.

import pytest
from pluggy import PluginValidationError, HookimplMarker, HookspecMarker


hookspec = HookspecMarker("example")
hookimpl = HookimplMarker("example")


def test_argmismatch(pm):
    class Api:
        @hookspec
        def hello(self, arg):
            "api hook 1"

    pm.add_hookspecs(Api)

    class Plugin:
        @hookimpl
        def hello(self, argwrong):
            pass