Add basic test for plugins module

Signed-off-by: Jean-Christophe Morin <jean_christophe_morin@hotmail.com>

pyproject.toml

@@ -23,6 +23,7 @@ dependencies = [
     "importlib_metadata>=4.6 ; python_version < '3.10'",
     # 1.3 introduces type hints.
     "pluggy>=1.2",
+    "typing-extensions; python_version < '3.8'"
 ]
 
 classifiers = [

tests/plugins/test_plugins.py

@@ -0,0 +1,26 @@
+import typing
+
+import pluggy
+
+import rez_pip.plugins
+
+
+def test_getManager():
+    assert isinstance(rez_pip.plugins.getManager(), pluggy.PluginManager)
+
+
+def test_getHook():
+    assert isinstance(rez_pip.plugins.getHook(), pluggy.HookRelay)
+
+
+def test_getHookImplementations():
+    implementations = rez_pip.plugins._getHookImplementations()
+    assert implementations == {
+        "rez_pip.PySide6": [
+            "cleanup",
+            "groupPackages",
+            "postPipResolve",
+            "prePipResolve",
+        ],
+        "rez_pip.shiboken6": ["cleanup"],
+    }