cloudflare--workers-sdk/packages/workers-shared/asset-worker/tests/compatibility-flags.test.ts

import { describe, test } from "vitest";
import { resolveCompatibilityOptions } from "../src/compatibility-flags";

describe("resolveCompatibilityOptions", () => {
	test("it does not interfere with existing flags", ({ expect }) => {
		expect(resolveCompatibilityOptions({ compatibility_flags: ["foo", "bar"] }))
			.toMatchInlineSnapshot(`
			{
			  "compatibilityDate": "2021-11-02",
			  "compatibilityFlags": [
			    "foo",
			    "bar",
			  ],
			}
		`);
	});

	test("it opts you into new flags if you have a future date", ({ expect }) => {
		const { compatibilityDate, compatibilityFlags } =
			resolveCompatibilityOptions({
				compatibility_flags: ["foo", "bar"],
				compatibility_date: "2099-12-12",
			});

		expect(compatibilityDate).toEqual("2099-12-12");
		expect(compatibilityFlags).toContain("foo");
		expect(compatibilityFlags).toContain("bar");
		expect(compatibilityFlags).toContain(
			"assets_navigation_prefers_asset_serving"
		);
	});

	test("it doesn't double you up if you've already opted into new flags and have a future date", ({
		expect,
	}) => {
		const { compatibilityDate, compatibilityFlags } =
			resolveCompatibilityOptions({
				compatibility_flags: [
					"foo",
					"bar",
					"assets_navigation_prefers_asset_serving",
				],
				compatibility_date: "2099-12-12",
			});

		expect(compatibilityDate).toEqual("2099-12-12");
		expect(compatibilityFlags).toContain("foo");
		expect(compatibilityFlags).toContain("bar");
		expect(
			compatibilityFlags.filter(
				(flag) => flag === "assets_navigation_prefers_asset_serving"
			).length
		).toBe(1);
	});

	test("it doesn't opt you into new flags if you have a future date and have disabled it", ({
		expect,
	}) => {
		const { compatibilityDate, compatibilityFlags } =
			resolveCompatibilityOptions({
				compatibility_flags: ["foo", "bar", "assets_navigation_has_no_effect"],
				compatibility_date: "2099-12-12",
			});

		expect(compatibilityDate).toEqual("2099-12-12");
		expect(compatibilityFlags).toContain("foo");
		expect(compatibilityFlags).toContain("bar");
		expect(compatibilityFlags).not.toContain(
			"assets_navigation_prefers_asset_serving"
		);
	});
});