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next-tjwater-frontend/src/test/module-boundaries.test.ts
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import { existsSync, readdirSync, readFileSync } from "node:fs";
import { join, relative } from "node:path";
import { describe, expect, it } from "vitest";
const sourceRoot = join(process.cwd(), "src");
function listRuntimeFiles(directory: string): string[] {
return readdirSync(directory, { withFileTypes: true }).flatMap((entry) => {
const target = join(directory, entry.name);
if (entry.isDirectory()) return listRuntimeFiles(target);
if (!/\.(ts|tsx)$/.test(entry.name) || /\.(test|e2e)\.(ts|tsx)$/.test(entry.name)) return [];
return [target];
});
}
function findMatches(directory: string, pattern: RegExp): string[] {
return listRuntimeFiles(directory).flatMap((file) => {
const source = readFileSync(file, "utf8");
return pattern.test(source) ? [relative(sourceRoot, file)] : [];
});
}
describe("frontend module boundaries", () => {
it("uses public feature entry points for absolute feature imports", () => {
expect(findMatches(sourceRoot, /@\/features\/(?:agent|workbench|map\/core)\//)).toEqual([]);
});
it("keeps shared independent from app, features, and mocks", () => {
expect(findMatches(join(sourceRoot, "shared"), /@\/(?:app|features|mocks)\//)).toEqual([]);
});
it("keeps map core independent from Agent and workbench code", () => {
expect(
findMatches(
join(sourceRoot, "features/map/core"),
/@\/features\/(?:agent|workbench)(?:\/|["'])/
)
).toEqual([]);
});
it("keeps Agent code independent from workbench code", () => {
expect(
findMatches(join(sourceRoot, "features/agent"), /@\/features\/workbench(?:\/|["'])/)
).toEqual([]);
});
it("does not restore Next.js client directives or the catch-all lib directory", () => {
expect(findMatches(sourceRoot, /^["']use client["'];?/m)).toEqual([]);
expect(existsSync(join(sourceRoot, "lib"))).toBe(false);
});
});