fix(deploy): wait for the expected HTTP release and report failed probes

src/lib/verify-deployed-release.test.ts

@@ -0,0 +1,48 @@
+import { afterEach, describe, expect, it, vi } from "vitest";
+import { verifyDeployedRelease } from "../../scripts/verify-deployed-release.mjs";
+
+const sha = "a".repeat(40);
+afterEach(() => vi.unstubAllGlobals());
+describe("deployed HTTP release readiness", () => {
+	it("waits through an old response and startup failure until the exact release is ready", async () => {
+		const fetch = vi
+			.fn()
+			.mockResolvedValueOnce(Response.json({ database: true }))
+			.mockRejectedValueOnce(new Error("connection refused"))
+			.mockResolvedValueOnce(Response.json({ database: true, release: sha }));
+		vi.stubGlobal("fetch", fetch);
+		const report = vi.fn();
+		await verifyDeployedRelease("http://localhost:3002/api/health", sha, {
+			attempts: 3,
+			interval: 0,
+			report,
+		});
+		expect(fetch).toHaveBeenCalledTimes(3);
+		expect(report).toHaveBeenCalledTimes(2);
+		expect(JSON.parse(report.mock.calls[0][0]).observed.release).toBeNull();
+	});
+	it.each([
+		[200, { database: true, release: "old" }],
+		[200, { database: true }],
+		[429, { status: "rate_limited" }],
+		[200, { database: false, release: sha }],
+	])(
+		"rejects HTTP %s without the expected healthy release",
+		async (status, body) => {
+			vi.stubGlobal(
+				"fetch",
+				vi.fn().mockResolvedValue(Response.json(body, { status })),
+			);
+			const report = vi.fn();
+			await expect(
+				verifyDeployedRelease("http://localhost:3002/api/health", sha, {
+					attempts: 2,
+					interval: 0,
+					report,
+				}),
+			).rejects.toThrow("never became healthy");
+			expect(report).toHaveBeenCalledTimes(2);
+			expect(JSON.parse(report.mock.calls[0][0]).observed.http).toBe(status);
+		},
+	);
+});