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perf(test): mock chokidar in canvas host tests

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This commit is contained in:
Peter Steinberger
2026-02-14 18:49:10 +00:00
parent dff3f8c271
commit 9365cd424f
1 changed files with 42 additions and 0 deletions
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42
src/canvas-host/server.test.ts
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@@ -10,6 +10,43 @@ import { defaultRuntime } from "../runtime.js";
import { A2UI_PATH, CANVAS_HOST_PATH, CANVAS_WS_PATH, injectCanvasLiveReload } from "./a2ui.js";
import { createCanvasHostHandler, startCanvasHost } from "./server.js";
const chokidarMockState = vi.hoisted(() => ({
watchers: [] as Array<{
on: (event: string, cb: (...args: unknown[]) => void) => unknown;
close: () => Promise<void>;
__emit: (event: string, ...args: unknown[]) => void;
}>,
}));
// Tests: avoid chokidar polling/fsevents; trigger "all" events manually.
vi.mock("chokidar", () => {
const createWatcher = () => {
const handlers = new Map<string, Array<(...args: unknown[]) => void>>();
const api = {
on: (event: string, cb: (...args: unknown[]) => void) => {
const list = handlers.get(event) ?? [];
list.push(cb);
handlers.set(event, list);
return api;
},
close: async () => {},
__emit: (event: string, ...args: unknown[]) => {
for (const cb of handlers.get(event) ?? []) {
cb(...args);
}
},
};
chokidarMockState.watchers.push(api);
return api;
};
const watch = () => createWatcher();
return {
default: { watch },
watch,
};
});
describe("canvas host", () => {
const quietRuntime = {
...defaultRuntime,
@@ -162,6 +199,7 @@ describe("canvas host", () => {
const index = path.join(dir, "index.html");
await fs.writeFile(index, "<html><body>v1</body></html>", "utf8");
const watcherStart = chokidarMockState.watchers.length;
const server = await startCanvasHost({
runtime: quietRuntime,
rootDir: dir,
@@ -171,6 +209,9 @@ describe("canvas host", () => {
});
try {
const watcher = chokidarMockState.watchers[watcherStart];
expect(watcher).toBeTruthy();
const res = await fetch(`http://127.0.0.1:${server.port}${CANVAS_HOST_PATH}/`);
const html = await res.text();
expect(res.status).toBe(200);
@@ -199,6 +240,7 @@ describe("canvas host", () => {
});
await fs.writeFile(index, "<html><body>v2</body></html>", "utf8");
watcher.__emit("all", "change", index);
expect(await msg).toBe("reload");
ws.close();
} finally {