test: address deprecation warnings

src/poetry/locations.py

@@ -29,7 +29,7 @@ if sys.platform == "darwin":
     auth_toml = _LEGACY_CONFIG_DIR / "auth.toml"
 
     if any(file.exists() for file in (auth_toml, config_toml)):
-        logger.warn(
+        logger.warning(
             "Configuration file exists at %s, reusing this directory.\n\nConsider"
             " moving configuration to %s, as support for the legacy directory will be"
             " removed in an upcoming release.",

src/poetry/utils/env.py

@@ -10,6 +10,7 @@ import re
 import subprocess
 import sys
 import sysconfig
+import warnings
 
 from contextlib import contextmanager
 from copy import deepcopy
@@ -1538,6 +1539,8 @@ class SystemEnv(Env):
 
         d = Distribution()
         d.parse_config_files()
+        with warnings.catch_warnings():
+            warnings.filterwarnings("ignore", "setup.py install is deprecated")
             obj = d.get_command_obj("install", create=True)
         obj.finalize_options()
 

tests/plugins/test_plugin_manager.py

@@ -32,8 +32,8 @@ class ManagerFactory(Protocol):
 
 class MyPlugin(Plugin):
     def activate(self, poetry: Poetry, io: BufferedIO) -> None:
-        io.write_line("Setting readme")
-        poetry.package.readme = "README.md"
+        io.write_line("Setting readmes")
+        poetry.package.readmes = ("README.md",)
 
 
 class MyCommandPlugin(ApplicationPlugin):
@@ -95,8 +95,8 @@ def test_load_plugins_and_activate(
     manager.load_plugins()
     manager.activate(poetry, io)
 
-    assert poetry.package.readme == "README.md"
-    assert io.fetch_output() == "Setting readme\n"
+    assert poetry.package.readmes == ("README.md",)
+    assert io.fetch_output() == "Setting readmes\n"
 
 
 def test_load_plugins_with_invalid_plugin(

tests/test_factory.py

@@ -28,8 +28,8 @@ fixtures_dir = Path(__file__).parent / "fixtures"
 
 class MyPlugin(Plugin):
     def activate(self, poetry: Poetry, io: IO) -> None:
-        io.write_line("Setting readme")
-        poetry.package.readme = "README.md"
+        io.write_line("Setting readmes")
+        poetry.package.readmes = ("README.md",)
 
 
 def test_create_poetry():
@@ -343,4 +343,4 @@ def test_create_poetry_with_plugins(mocker: MockerFixture):
 
     poetry = Factory().create_poetry(fixtures_dir / "sample_project")
 
-    assert poetry.package.readme == "README.md"
+    assert poetry.package.readmes == ("README.md",)