Ekklesia/tests/boundaries.test.ts

import path from "node:path";
import { fileURLToPath } from "node:url";
import { describe, expect, it } from "vitest";
import { checkBoundaries } from "../scripts/check-boundaries.js";

const testDirectory = path.dirname(fileURLToPath(import.meta.url));
const fixtures = path.join(testDirectory, "fixtures", "boundaries");

describe("repository dependency boundaries", () => {
  it("accepts public contracts below Core", async () => {
    const result = await checkBoundaries(path.join(fixtures, "legal"));
    expect(result.violations).toEqual([]);
  });

  it("accepts generated module composition only through the generated bootstrap boundary", async () => {
    const result = await checkBoundaries(path.join(fixtures, "legal-generated-bootstrap"));
    expect(result.violations).toEqual([]);
  });

  it("honors explicit pnpm workspace exclusions", async () => {
    const result = await checkBoundaries(path.join(fixtures, "workspace-exclusion"));
    expect(result.violations).toEqual([]);
  });

  it.each([
    ["core-imports-module", "core-is-feature-agnostic"],
    ["app-imports-module", "apps-are-composition-roots"],
    ["module-imports-core", "modules-use-public-platform-contracts"],
    ["module-imports-surface", "modules-use-public-platform-contracts"],
    ["package-boundary-direction", "modules-use-public-platform-contracts"],
    ["cross-module-import", "modules-do-not-import-other-modules"],
    ["module-schema-imports-module", "modules-do-not-import-other-modules"],
    ["surface-imports-module", "surfaces-use-public-contracts"],
    ["surface-imports-contracts", "surfaces-use-public-contracts"],
    ["cross-surface-import", "surfaces-are-independent"],
    ["builder-imports-module", "builder-composes-contracts"],
    ["contracts-import-core", "contracts-do-not-depend-upward"],
    ["sdk-imports-core", "sdks-do-not-depend-on-implementations"],
    ["shared-role-order", "sdks-do-not-depend-on-implementations"],
    ["package-without-exports", "workspace-imports-use-public-exports"],
    ["private-package-import", "workspace-imports-use-public-exports"],
    ["non-workspace-version", "internal-dependencies-use-workspace-protocol"],
    ["workspace-alias", "workspace-dependency-aliases-are-forbidden"],
    ["undeclared-workspace-dependency", "workspace-dependencies-are-declared"],
    ["duplicate-package-name", "workspace-package-names-are-unique"],
    ["unknown-shared-role", "shared-packages-declare-known-roles"],
    ["workspace-unsupported-pattern", "workspace-patterns-use-supported-syntax"],
    ["package-cycle", "no-circular-package-dependencies"],
    ["module-has-ui", "modules-do-not-own-ui"],
    ["module-ui-framework", "modules-do-not-own-ui"],
    ["module-ui-aliased-framework", "modules-do-not-own-ui"],
    ["module-ui-imports-core", "modules-use-public-platform-contracts"],
    ["module-ui-bundler-plugin", "modules-do-not-own-ui"],
    ["module-imports-ui-host", "modules-use-public-platform-contracts"],
    ["module-imports-surface-sdk", "modules-use-public-platform-contracts"],
    ["design-package-depends-upward", "design-packages-depend-downward-only"],
    ["cross-package-relative", "workspace-imports-use-public-exports"],
    ["cycle", "no-circular-source-dependencies"],
    ["runtime-peer-only-dependency", "runtime-imports-are-production-dependencies"],
    ["runtime-dev-only-dependency", "runtime-imports-are-production-dependencies"],
    ["runtime-jsx-implies-react", "runtime-imports-are-production-dependencies"],
    ["runtime-undeclared-dependency", "runtime-imports-are-production-dependencies"],
  ])("rejects %s", async (fixture, expectedRule) => {
    const result = await checkBoundaries(path.join(fixtures, fixture));
    expect(result.violations.map((violation) => violation.rule)).toContain(expectedRule);
  });

  it("rejects a misplaced stylesheet and case-insensitive view files inside a module, but not TSX", async () => {
    const result = await checkBoundaries(path.join(fixtures, "module-has-ui"));
    const uiViolations = result.violations.filter(
      (violation) => violation.rule === "modules-do-not-own-ui",
    );

    expect(uiViolations).toHaveLength(2);
    expect(uiViolations.map((violation) => violation.from)).toEqual(
      expect.arrayContaining([
        // A stylesheet outside a compiled browser source root is a file no build reads and no host
        // loads — the undeclared sidecar ADR 0023 rejected, just relocated (ADR 0040).
        "modules/calendar/src/calendar.css",
        "modules/calendar/src/view.ASTRO",
      ]),
    );
    // Inside `src/ui/`, a plain stylesheet is legitimate source the canonical builder compiles into
    // the declared artifact.
    expect(uiViolations.map((violation) => violation.from)).not.toContain(
      "modules/calendar/src/ui/styles.css",
    );
    // React is the supported module UI authoring model (ADR 0022), so a module's own `.tsx` is
    // legitimate source and must no longer be reported.
    expect(uiViolations.map((violation) => violation.from)).not.toContain(
      "modules/calendar/src/calendar.tsx",
    );
  });

  it("rejects unsupported UI frameworks, their imports, and view formats inside a module", async () => {
    const result = await checkBoundaries(path.join(fixtures, "module-ui-framework"));
    const uiViolations = result.violations.filter(
      (violation) => violation.rule === "modules-do-not-own-ui",
    );

    expect(uiViolations).toHaveLength(3);
    expect(uiViolations.map((violation) => violation.message)).toEqual(
      expect.arrayContaining([
        "Module package depends on UI framework preact.",
        "Module source imports UI framework preact.",
      ]),
    );
    // The fixture also aliases `compat` to react, which is now the supported framework and is
    // therefore no longer a violation.
    expect(uiViolations.map((violation) => violation.message).join(" ")).not.toContain("compat");
  });

  it("accepts runtime imports declared as production dependencies, and everything that is not shipped runtime code", async () => {
    // Production and optional dependencies, a peer kept beside its production declaration, Node
    // built-ins, the package's own exports, type-only imports of development dependencies, and
    // tests or build scripts that run with development dependencies installed.
    const result = await checkBoundaries(path.join(fixtures, "legal-runtime-dependencies"));

    expect(result.violations).toEqual([]);
  });

  it("accepts only the consumer-selected runtime peers: the database adapter's Drizzle and the shared UI's React", async () => {
    const result = await checkBoundaries(path.join(fixtures, "legal-consumer-runtime-peer"));

    expect(result.violations).toEqual([]);
  });

  it.each([
    [
      "runtime-peer-only-dependency",
      "packages/sdk/src/index.ts",
      "drizzle-orm",
      "only as a peer dependency",
    ],
    [
      "runtime-dev-only-dependency",
      "packages/sdk/src/index.ts",
      "zod",
      "only as a development dependency",
    ],
    // The automatic JSX runtime imports `react/jsx-runtime` without that import appearing in source.
    [
      "runtime-jsx-implies-react",
      "packages/ui/src/index.tsx",
      "react",
      "only as a peer dependency",
    ],
    [
      "runtime-undeclared-dependency",
      "modules/calendar/src/server/index.ts",
      "sharp",
      "not at all",
    ],
  ])("reports %s once, naming the file, the package, and how it is declared", async (fixture, from, to, declaredAs) => {
    // A workspace package's imports resolve from its own node_modules: a peer is never satisfied
    // there by the consumer, and a production install omits development dependencies, so each of
    // these imports fails at run time in the production image even though development works.
    const result = await checkBoundaries(path.join(fixtures, fixture));

    expect(result.violations).toEqual([
      {
        from,
        message: expect.stringContaining(`declares it ${declaredAs}`),
        rule: "runtime-imports-are-production-dependencies",
        to,
      },
    ]);
  });

  it("still rejects module UI source that reaches into Core internals", async () => {
    // Allowing `.tsx` inside a module changed which *formats* a module may contain. It did not
    // change which layers a module may import: module UI is subject to the identical layer rules
    // as module backend source.
    const result = await checkBoundaries(path.join(fixtures, "module-ui-imports-core"));

    expect(result.violations).toEqual([
      {
        from: "modules/announcements/src/ui/editor.tsx",
        message: "module code may not import core code directly.",
        rule: "modules-use-public-platform-contracts",
        to: "core/src/index.ts",
      },
    ]);
  });

  it("accepts the canonical module UI dependency set: React, the UI SDK, and the build tool", async () => {
    // Mirrors what `templates/module` actually declares (ADR 0023). The build tool is a `tooling`
    // shared package, a role modules were already permitted to depend on, so the module UI build
    // pipeline required no boundary relaxation at all.
    const result = await checkBoundaries(path.join(fixtures, "module-owns-react-ui"));

    expect(result.violations).toEqual([]);
  });

  it("accepts a module consuming the approved design packages", async () => {
    // ADR 0039 opens exactly two shared roles to module UI — `design-tokens` and `ui` — so two
    // modules' screens can look like one product. Both are browser-safe by construction, so this
    // adds no path from module UI to a backend type graph.
    const result = await checkBoundaries(path.join(fixtures, "module-uses-design-packages"));

    expect(result.violations).toEqual([]);
  });

  it("keeps every other shared role out of module packages", async () => {
    // The relaxation above is a named allowlist, not "browser-safe shared packages are fine": a
    // surface SDK, an API client, and an auth client all stay rejected.
    const result = await checkBoundaries(path.join(fixtures, "module-imports-surface-sdk"));

    expect(result.violations.map((violation) => violation.rule)).toEqual([
      "modules-use-public-platform-contracts",
      "modules-use-public-platform-contracts",
    ]);
  });

  it("keeps the design packages at the bottom of the presentation stack", async () => {
    // Neither may reach an API client, an auth client, the contracts barrel, or an implementation
    // layer: a design package that could would put all of it inside every module artifact that
    // renders a button.
    const result = await checkBoundaries(path.join(fixtures, "design-package-depends-upward"));

    expect(result.violations.map((violation) => violation.rule)).toEqual([
      "design-packages-depend-downward-only",
      "design-packages-depend-downward-only",
      "design-packages-depend-downward-only",
      "design-packages-depend-downward-only",
    ]);
  });

  it("keeps the host loader out of module packages", async () => {
    // `@ekklesia/module-ui-host` is host infrastructure. A module that depended on it would bundle
    // loader code into its own artifact and blur the author/host split (ADR 0024), so the
    // `module-ui-host` role is deliberately absent from the roles a module may depend on.
    const result = await checkBoundaries(path.join(fixtures, "module-imports-ui-host"));

    expect(result.violations.map((violation) => violation.rule)).toEqual([
      "modules-use-public-platform-contracts",
      "modules-use-public-platform-contracts",
    ]);
  });

  it("still rejects a module reaching for a bundler plugin ecosystem", async () => {
    // Module authors do not configure a bundler; `@ekklesia/module-ui-build` owns that entirely.
    const result = await checkBoundaries(path.join(fixtures, "module-ui-bundler-plugin"));

    expect(result.violations.map((violation) => violation.message)).toEqual([
      "Module package depends on UI framework @vitejs/plugin-react.",
    ]);
  });

  it("rejects an unsupported framework aliased behind the supported one", async () => {
    const result = await checkBoundaries(path.join(fixtures, "module-ui-aliased-framework"));

    expect(result.violations.map((violation) => violation.message)).toEqual([
      "Module package depends on UI framework vue aliased as react.",
    ]);
  });

  it("requires workspace: ranges in every dependency field", async () => {
    const result = await checkBoundaries(path.join(fixtures, "non-workspace-version"));
    expect(
      result.violations.filter(
        (violation) => violation.rule === "internal-dependencies-use-workspace-protocol",
      ),
    ).toHaveLength(4);
  });

  it("resolves forbidden workspace aliases before applying layer rules", async () => {
    const result = await checkBoundaries(path.join(fixtures, "workspace-alias"));
    expect(
      result.violations.filter(
        (violation) => violation.rule === "workspace-dependency-aliases-are-forbidden",
      ),
    ).toHaveLength(2);
    expect(result.violations.map((violation) => violation.rule)).toEqual(
      expect.arrayContaining([
        "workspace-dependency-aliases-are-forbidden",
        "modules-use-public-platform-contracts",
      ]),
    );
  });

  it("prevents contracts and SDKs from depending upward through shared packages", async () => {
    const result = await checkBoundaries(path.join(fixtures, "shared-role-order"));
    expect(result.violations.map((violation) => violation.rule)).toEqual(
      expect.arrayContaining([
        "contracts-do-not-depend-upward",
        "sdks-do-not-depend-on-implementations",
      ]),
    );
  });
});