Fix CI install failures on Windows

pyproject.toml

@@ -3,7 +3,7 @@ requires = ["setuptools>=60", "wheel", "setuptools_scm>=8.0"]
 build-backend = "setuptools.build_meta"
 
 [tool.setuptools]
-packages = {find = {include = ["shiny", "shiny.*"]}}
+packages = { find = { include = ["shiny", "shiny.*"] } }
 
 [tool.setuptools_scm]
 write_to = "shiny/_version.py"
@@ -12,13 +12,11 @@ local_scheme = "no-local-version"
 [project]
 name = "shiny"
 dynamic = ["version"]
-authors = [
-    {name = "Winston Chang", email = "[email protected]"},
-]
+authors = [{ name = "Winston Chang", email = "[email protected]" }]
 description = "A web development framework for Python."
 readme = "README.md"
 requires-python = ">=3.8"
-license = {text = "MIT"}
+license = { text = "MIT" }
 classifiers = [
     "Development Status :: 5 - Production/Stable",
     "Intended Audience :: Developers",
@@ -67,7 +65,7 @@ test = [
     "psutil",
     "astropy",
     "suntime",
-    "timezonefinder",
+    "timezonefinder ; platform_system != 'Windows'",
     "ipyleaflet",
     "shinywidgets",
     "seaborn",

tests/playwright/examples/test_examples.py

@@ -1,9 +1,35 @@
+import sys
+
 import pytest
 from example_apps import get_apps, reruns, reruns_delay, validate_example
 from playwright.sync_api import Page
 
+is_windows = sys.platform.startswith("win")
+
 
 @pytest.mark.flaky(reruns=reruns, reruns_delay=reruns_delay)
 @pytest.mark.parametrize("ex_app_path", get_apps("examples"))
 def test_examples(page: Page, ex_app_path: str) -> None:
+
+    skip_on_windows_with_timezonefinder(ex_app_path)
+
     validate_example(page, ex_app_path)
+
+
+def skip_on_windows_with_timezonefinder(ex_app_path: str) -> None:
+    if not is_windows:
+        return
+    if ex_app_path != "examples/airmass/app.py":
+        return
+
+    try:
+        import timezonefinder  # noqa: F401 # pyright: ignore
+
+        # Future proofing: if timezonefinder is actually available on windows, raise an error
+        raise RuntimeError(
+            "This code believes timezonefinder is not available on windows. Please remove this check if it is no longer true."
+        )
+    except ImportError:
+        pytest.skip(
+            "timezonefinder has difficulty compiling on windows. Skipping example app. posit-dev/py-shiny#1651"
+        )