Fix test_click_click_object_definition on macOS, and use temporary paths for generating plugins (#40)

* Use fork as the start method

* Use temporary directories for generating plugins

* Add macOS tests because why not

* Use Python 3.12 for tests

Author: agriyakhetarpal

.github/workflows/main.yml

@@ -11,12 +11,16 @@ concurrency:
 
 jobs:
   test:
-    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        runs-on: [ubuntu-latest, macos-latest]
+      fail-fast: false
+    runs-on: ${{ matrix.runs-on }}
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v3
         with:
-          python-version: 3.10.2
+          python-version: 3.12
       - name: Install
         shell: bash -l {0}
         run: |

pyodide_cli/tests/test_cli.py

@@ -1,20 +1,30 @@
 import pathlib
+import shutil
 import subprocess
-from multiprocessing import Process, Queue
+from multiprocessing import Process, Queue, set_start_method
 from subprocess import check_output
 
 import pytest
 
+try:
+    set_start_method("fork")
+except RuntimeError:
+    pass
+
 
 @pytest.fixture(scope="module")
-def plugins():
-    test_plugin = pathlib.Path(__file__).parent / "plugin-test"
+def plugins(tmp_path_factory):
+    tmp_dir = tmp_path_factory.mktemp("plugin-test")
+    source_plugin = pathlib.Path(__file__).parent / "plugin-test"
+
+    tmp_plugin = tmp_dir / "plugin-test"
+    shutil.copytree(source_plugin, tmp_plugin)
 
-    subprocess.run(["pip", "install", str(test_plugin)])
+    subprocess.run(["pip", "install", str(tmp_plugin)])
 
     yield
 
-    subprocess.run(["pip", "uninstall", "-y", test_plugin.name])
+    subprocess.run(["pip", "uninstall", "-y", "plugin-test"])
 
 
 def test_cli_help():