test: add import smoke test (reveals undeclared selenium dep)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

pyproject.toml

@@ -32,6 +32,7 @@ black = "*"
 pre-commit = "*"
 isort = "*"
 flake8 = "*"
+pytest = "*"
 #Sphinx = "^5.3.0"
 #sphinx-rtd-theme = "^1.3.0"
 
@@ -49,3 +50,7 @@ combine_as_imports = true
 include_trailing_comma = true
 force_grid_wrap = 3
 ensure_newline_before_comments = true
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]
+addopts = "-ra"

tests/test_imports.py

@@ -0,0 +1,32 @@
+import importlib
+import pkgutil
+
+import smileyface
+
+
+def test_top_level_package_imports():
+    importlib.import_module("smileyface")
+
+
+def test_all_submodules_import():
+    errors = []
+
+    def _on_walk_error(name):
+        errors.append(f"{name}: failed during package walk")
+
+    module_names = [
+        info.name
+        for info in pkgutil.walk_packages(
+            smileyface.__path__,
+            prefix="smileyface.",
+            onerror=_on_walk_error,
+        )
+    ]
+
+    for name in module_names:
+        try:
+            importlib.import_module(name)
+        except Exception as exc:  # noqa: BLE001 - we want every failure, not the first
+            errors.append(f"{name}: {exc!r}")
+
+    assert not errors, "Modules failed to import:\n" + "\n".join(errors)