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52 lines
1.6 KiB
Python
52 lines
1.6 KiB
Python
"""Tests must reason about the whole cascade, not one file of it.
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The former ``static/style.css`` has been decomposed into an ordered cascade.
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A test that names the deleted file as a runtime stylesheet silently loses the
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split cascade. Python, JavaScript, MJS and HTML test sources are all scanned
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recursively so nested browser tests cannot escape this guard.
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"""
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import re
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from pathlib import Path
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ROOT = Path(__file__).resolve().parents[1]
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SELF = Path(__file__).name
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# The helper module and the manifest/snapshot tests are about the stylesheet
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# set itself, so naming the file is the point rather than a mistake.
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ALLOWED = {SELF, "test_static_stylesheet_manifest.py", "test_css_computed_style_snapshot.py"}
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_DELETED_STYLE_LITERAL = re.compile(
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r'''["'][^"'\n]*static/style\.css[^"'\n]*["']'''
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)
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_SUFFIXES = {".py", ".js", ".mjs", ".html"}
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def _test_sources():
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return [
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p
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for p in sorted((ROOT / "tests").rglob("*"))
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if p.is_file()
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and p.suffix in _SUFFIXES
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and p.name not in ALLOWED
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]
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def test_sources_are_discoverable() -> None:
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"""Guard the guard: a layout change must not make this vacuous."""
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assert len(_test_sources()) > 100
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def test_no_test_names_deleted_style_css_as_a_runtime_asset() -> None:
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offenders = [
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str(p.relative_to(ROOT))
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for p in _test_sources()
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if _DELETED_STYLE_LITERAL.search(p.read_text(encoding="utf-8"))
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]
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assert offenders == [], (
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"tests must load the app stylesheet cascade instead of the deleted "
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f"static/style.css asset: {offenders}"
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)
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