Add Bazel pytest runner for Python tests

python/tests/BUILD.bazel

@@ -4,11 +4,16 @@ load("@rules_python//python:py_test.bzl", "py_test")
 py_test(
     name = "test_opencc",
     size = "small",
-    srcs = ["test_opencc.py"],
+    srcs = [
+        "pytest_runner.py",
+        "test_opencc.py",
+    ],
+    args = ["test_opencc.py"],
     data = [
         "//test/testcases",
     ],
     imports = [".."],
+    main = "pytest_runner.py",
     deps = [
         "//python/opencc",
         requirement("pytest"),
@@ -20,8 +25,13 @@ py_test(
 py_test(
     name = "test_cli",
     size = "small",
-    srcs = ["test_cli.py"],
+    srcs = [
+        "pytest_runner.py",
+        "test_cli.py",
+    ],
+    args = ["test_cli.py"],
     imports = [".."],
+    main = "pytest_runner.py",
     deps = [
         "//python/opencc",
         requirement("pytest"),

python/tests/pytest_runner.py

@@ -0,0 +1,26 @@
+import os
+import sys
+
+import pytest
+
+
+def _test_path(test_dir: str, arg: str) -> str:
+    if os.path.isabs(arg):
+        return arg
+    return os.path.join(test_dir, arg)
+
+
+def main() -> int:
+    test_dir = os.path.dirname(os.path.abspath(__file__))
+    test_paths = [_test_path(test_dir, arg) for arg in sys.argv[1:]]
+    if not test_paths:
+        test_paths = [test_dir]
+
+    return pytest.main([
+        *test_paths,
+        f'--rootdir={test_dir}',
+    ])
+
+
+if __name__ == '__main__':
+    sys.exit(main())

python/tests/test_cli.py

@@ -218,7 +218,3 @@ def test_cli_custom_config_path_without_json_extension(tmp_path, monkeypatch):
     )
 
     assert output_path.read_text(encoding='utf-8') == '滑鼠'
-
-
-if __name__ == "__main__":
-    sys.exit(pytest.main([os.path.abspath(__file__)]))

python/tests/test_opencc.py

@@ -1,7 +1,5 @@
 import json
 import os
-import pytest
-import sys
 import zipfile
 
 _this_dir = os.path.dirname(os.path.abspath(__file__))
@@ -131,7 +129,3 @@ def test_custom_config_path_without_json_extension_is_preserved():
     assert opencc._normalize_config_name('./s2t') == './s2t'
     assert opencc._normalize_config_name('configs/s2t') == 'configs/s2t'
     assert opencc._normalize_config_name(r'configs\s2t') == r'configs\s2t'
-
-
-if __name__ == "__main__":
-    sys.exit(pytest.main([os.path.abspath(__file__)]))