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WRNexusJS/packages/styles/test/removed-config-keys.test.ts
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TypeScript

import { expect, test } from "bun:test";
import { validateAppConfig } from "../src/config.ts";
// A stale config must fail loudly. Silently ignoring a removed key leaves
// someone believing a flag still applies.
const REMOVED = [
{ key: "compatibilityDate", config: { compatibilityDate: "2026-08-02" } },
{ key: "frameworkBehaviour", config: { frameworkBehaviour: 1 } },
{ key: "functions", config: { functions: { legacyDefaultRuntime: "current" } } },
{ key: "compatibility", config: { compatibility: { legacyEmit: false } } },
];
for (const { key, config } of REMOVED) {
test(`a config still setting "${key}" is rejected with a message naming it`, () => {
const issues = validateAppConfig(config as never);
const match = issues.find((issue) => issue.path === key || issue.path.startsWith(`${key}.`));
expect(match).toBeDefined();
expect(match!.severity).toBe("error");
expect(match!.message.toLowerCase()).toContain("removed");
});
}
test("a config without those keys is accepted", () => {
const issues = validateAppConfig({} as never);
expect(issues.filter((issue) => issue.severity === "error")).toEqual([]);
});