Add tests for minimal dependencies.

Add `copy` extra to include the `zope.copy` dependency.

Fixes #5.

.meta.toml

@@ -2,7 +2,7 @@
 # https://github.com/zopefoundation/meta/tree/master/config/pure-python
 [meta]
 template = "pure-python"
-commit-id = "75c6251b"
+commit-id = "0754ed06"
 
 [python]
 with-macos = false
@@ -14,6 +14,20 @@ with-sphinx-doctests = true
 
 [tox]
 use-flake8 = true
+additional-envlist = [
+    "py311-minimal",
+    "py311-component",
+]
+testenv-additional = [
+    "",
+    "[testenv:py311-minimal]",
+    "extras = test-minimal",
+    "commands = zope-testrunner --test-path=src {posargs:-vc}",
+    "",
+    "[testenv:py311-component]",
+    "extras = test-component",
+    "commands = zope-testrunner --test-path=src {posargs:-vc}",
+]
 
 [coverage]
 fail-under = 100

CHANGES.rst

@@ -9,6 +9,9 @@
 
 - Drop support for Python 3.7, 3.8.
 
+- Add tests for minimal dependencies.
+
+- Add ``copy`` extra to include the ``zope.copy`` dependency.
 
 5.0 (2023-05-25)
 ================

setup.py

@@ -37,8 +37,11 @@ def read(*rnames):
     'zope.component >= 4.0.1',
 ]
 
-TESTS_REQUIRE = ZCML_REQUIRES + COMPONENT_REQUIRES + [
+COPY_REQUIRES = [
     'zope.copy >= 4.0',
+]
+
+TESTS_REQUIRE = [
     'zope.testrunner',
 ]
 
@@ -57,7 +60,7 @@ def read(*rnames):
           + '\n\n' +
           read('CHANGES.rst')
       ),
-      license='ZPL 2.1',
+      license='ZPL-2.1',
       keywords=('zope location structural'),
       classifiers=[
           'Development Status :: 5 - Production/Stable',
@@ -93,7 +96,15 @@ def read(*rnames):
       extras_require={
           'zcml': ZCML_REQUIRES,
           'component': COMPONENT_REQUIRES,
-          'test': TESTS_REQUIRE,
+          'copy': COPY_REQUIRES,
+          'test-minimal': TESTS_REQUIRE,
+          'test-component': TESTS_REQUIRE + COMPONENT_REQUIRES + ZCML_REQUIRES,
+          'test': (
+              TESTS_REQUIRE
+              + ZCML_REQUIRES
+              + COMPONENT_REQUIRES
+              + COPY_REQUIRES
+          ),
           'docs': DOCS_REQUIRE,
       },
       include_package_data=True,

src/zope/location/testing.py

@@ -0,0 +1,10 @@
+import importlib
+import unittest
+
+
+def skipUnlessImportable(module: str):
+    try:
+        importlib.import_module(module)
+    except ModuleNotFoundError:  # pragma: no cover
+        return unittest.skip(f"{module!r} not importable")
+    return lambda func: func

src/zope/location/tests/test_configure.py

@@ -15,12 +15,22 @@
 """
 import unittest
 
+from zope.location.testing import skipUnlessImportable
 
+
+@skipUnlessImportable('zope.component')
 class Test_ZCML_loads(unittest.TestCase):
 
     def test_it(self):
         import zope.component  # no registrations made if not present
-        ADAPTERS_REGISTERED = 4
+
+        try:
+            import zope.copy
+            ADAPTERS_REGISTERED = 4
+        except ModuleNotFoundError:  # pragma: no cover
+            ADAPTERS_REGISTERED = 3
+        else:
+            del zope.copy
         from zope.configuration.xmlconfig import XMLConfig
         from zope.configuration.xmlconfig import _clearContext
         from zope.configuration.xmlconfig import _getContext

src/zope/location/tests/test_pickling.py

@@ -13,7 +13,10 @@
 ##############################################################################
 import unittest
 
+from zope.location.testing import skipUnlessImportable
 
+
+@skipUnlessImportable('zope.copy')
 class LocationCopyHookTests(unittest.TestCase):
 
     def _getTargetClass(self):

tox.ini

@@ -13,6 +13,8 @@ envlist =
     pypy3
     docs
     coverage
+    py311-minimal
+    py311-component
 
 [testenv]
 usedevelop = true
@@ -27,6 +29,14 @@ extras =
     test
     docs
 
+[testenv:py311-minimal]
+extras = test-minimal
+commands = zope-testrunner --test-path=src {posargs:-vc}
+
+[testenv:py311-component]
+extras = test-component
+commands = zope-testrunner --test-path=src {posargs:-vc}
+
 [testenv:setuptools-latest]
 basepython = python3
 deps =