tests: add typesafety tests

pyproject.toml

@@ -37,7 +37,7 @@ force_single_line = true
 line_length = 88
 
 [tool.pytest.ini_options]
-addopts = "-ra -m 'not hdfs'"
+addopts = "-ra -m 'not hdfs' -p no:pytest-mypy-plugins"
 markers = [
   "hdfs: mark test as hdfs",
   "pathlib: mark cpython pathlib tests",
@@ -61,7 +61,7 @@ exclude_lines = [
 
 [tool.mypy]
 # Error output
-show_column_numbers = true
+show_column_numbers = false
 show_error_codes = true
 show_error_context = true
 show_traceback = true

setup.cfg

@@ -33,7 +33,8 @@ tests =
     pytest-cov==4.1.0
     pytest-mock==3.12.0
     pylint==2.17.4
-    mypy==1.8.0
+    mypy==1.9.0
+    pytest-mypy-plugins==3.1.2
     packaging
 dev =
     %(tests)s

typesafety/test_upath_interface.yml

@@ -0,0 +1,6 @@
+- case: upath_interface
+  disable_cache: true
+  main: |
+    from upath import UPath
+
+    reveal_type(UPath("abc"))  # N: Revealed type is "upath.core.UPath"