Chris Amow
e69d1c190f
The trendline slope fix was already correct — measured on the live chart, the two rendered segments came out at screen slopes 0.4910 and 0.4903, collinear. It still reproduced in the browser because the browser was not running it. StaticFiles sends an ETag but no Cache-Control, and the asset URLs carried no version, so nothing forced a refetch. A tab left open across an edit never fetches at all: it keeps executing the JavaScript it loaded when the page was first opened. Every fix since that tab was opened was invisible in it. The page now stamps its own asset URLs with a digest of their contents and is itself served no-store. Hashing rather than stamping mtimes, because a deploy checks every file out fresh and would otherwise invalidate assets that never changed. This also removes a trap the README already half-documented for deploys: an /api-only change leaves the HTML byte-identical, and until now a JavaScript change could leave the served page byte-identical too. The debug handle used to measure the geometry is kept deliberately. Chart rendering bugs are invisible from the outside, and window.__chart.lineData() against timeToCoordinate() is what settled this one. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
32 lines
1.1 KiB
Python
32 lines
1.1 KiB
Python
import re
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from fastapi.testclient import TestClient
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import main
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def test_assets_are_versioned_and_the_page_is_not_cached():
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# Not a context manager: that would run the lifespan, which seeds months of
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# history from Yahoo before serving anything.
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response = TestClient(main.app).get("/")
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assert response.headers["cache-control"] == "no-store"
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refs = re.findall(r'(?:src|href)="(/static/[^"]+)"', response.text)
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assert refs, "no static assets referenced"
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# Without this a tab left open keeps running the JavaScript it first loaded,
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# which made a fixed bug look like it was still broken.
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assert all("?v=" in ref for ref in refs), refs
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def test_version_tracks_content_not_timestamps(tmp_path, monkeypatch):
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asset = tmp_path / "app.js"
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asset.write_text("//", encoding="utf-8")
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monkeypatch.setattr(main, "STATIC_DIR", tmp_path)
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first = main.asset_version()
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asset.touch()
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# A deploy checks every file out fresh; unchanged assets must stay cached.
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assert main.asset_version() == first
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asset.write_text("// changed", encoding="utf-8")
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assert main.asset_version() != first
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