test(multiclass): Allow tests to be performed conditionally

Some tests behave differently for multiclass build; smuggle the build into config variable and pass into tests

multi-subclass.patch

@@ -3,7 +3,8 @@
  lxml-stubs/html/_element.pyi       | 35 ++++++++++--------
  lxml-stubs/objectify/_element.pyi  |  8 ++--
  pyproject.toml                     |  2 +-
- 5 files changed, 65 insertions(+), 62 deletions(-)
+ test-rt/conftest.py                |  2 +-
+ 6 files changed, 66 insertions(+), 63 deletions(-)
 
 diff --git a/lxml-stubs/etree/_element.pyi b/lxml-stubs/etree/_element.pyi
 index a093bea..445c801 100644
@@ -317,7 +318,7 @@ index 2b8a301..7fc46e5 100644
          expr: str,
          *,
 diff --git a/pyproject.toml b/pyproject.toml
-index 3794c4c..3538d1d 100644
+index 94a0848..648d1cd 100644
 --- a/pyproject.toml
 +++ b/pyproject.toml
 @@ -5,7 +5,7 @@ requires = ['pdm-backend ~= 2.3']
@@ -329,3 +330,16 @@ index 3794c4c..3538d1d 100644
  dynamic = ['version']
  description = 'Complete lxml external type annotation'
  readme = 'README.md'
+diff --git a/test-rt/conftest.py b/test-rt/conftest.py
+index 27ea129..8e611ce 100644
+--- a/test-rt/conftest.py
++++ b/test-rt/conftest.py
+@@ -20,7 +20,7 @@ def pytest_collection_finish(session: pytest.Session) -> None:
+
+ def pytest_configure(config: pytest.Config) -> None:
+     # "normal" or "multiclass"
+-    setattr(config, "types_lxml_build", "normal")
++    setattr(config, "types_lxml_build", "multiclass")
+
+
+ def _bightml_filepath() -> Path:

test-rt/conftest.py

@@ -18,6 +18,11 @@ def pytest_collection_finish(session: pytest.Session) -> None:
         adapter.run_typechecker_on(files)
 
 
+def pytest_configure(config: pytest.Config) -> None:
+    # "normal" or "multiclass"
+    setattr(config, "types_lxml_build", "normal")
+
+
 def _bightml_filepath() -> Path:
     return Path(__file__).resolve().parent / "data" / "sample.html.xz"
 

test-rt/test_elem_class_lookup.py

@@ -79,7 +79,9 @@ class MyBaseElement(ElementBase):
                 count += 1
         assert count == 7
 
-    def test_single_ns_all_tag_2(self, svg_filepath: pathlib.Path) -> None:
+    def test_single_ns_all_tag_2(
+        self, svg_filepath: pathlib.Path, request: pytest.FixtureRequest
+    ) -> None:
         """Class lookup that creates my single element type
         for all nodes under specific namespace, while proving
         that parser subscript type can't be modified"""
@@ -101,9 +103,18 @@ class MyBaseElement(ElementBase):
         tree = _e.parse(svg_filepath, parser=parser)
         root = tree.getroot()
 
-        with pytest.raises(TypeCheckError, match="not an instance of .*MyBaseElement"):
+        if getattr(request.config, "types_lxml_build") == "multiclass":
+            # For multiclass build, .iter() is hardcoded to return _Element,
+            # and author is expected to do method / annotation overrides
+            # in their classes
             for e in root.iter():
                 reveal_type(e)
+        else:
+            with pytest.raises(
+                TypeCheckError, match="not an instance of .*MyBaseElement"
+            ):
+                for e in root.iter():
+                    reveal_type(e)
 
     def test_single_ns_single_tag_1(self, svg_filepath: pathlib.Path) -> None:
         """Decorator and non-decorator ways of adding per-tag
@@ -170,7 +181,9 @@ class _EmphClass(ElementBase):
                 count += 1
         assert count == 3
 
-    def test_default_ns(self, svg_filepath: pathlib.Path) -> None:
+    def test_default_ns(
+        self, svg_filepath: pathlib.Path, request: pytest.FixtureRequest
+    ) -> None:
         """Class lookup that creates my single element type
         for all nodes under all namespaces, behaving like
         ElementDefaultClassLookup"""
@@ -192,6 +205,13 @@ class MyBaseElement(ElementBase):
         root = tree.getroot()
         reveal_type(root)
 
-        with pytest.raises(TypeCheckError, match="not an instance of .*MyBaseElement"):
+        if getattr(request.config, "types_lxml_build") == "multiclass":
+            # See test_single_ns_all_tag_2 test
             for e in root.iter():
                 reveal_type(e)
+        else:
+            with pytest.raises(
+                TypeCheckError, match="not an instance of .*MyBaseElement"
+            ):
+                for e in root.iter():
+                    reveal_type(e)