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"],
    ["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-imports-ui-package", "modules-use-public-platform-contracts"],
    ["cross-package-relative", "workspace-imports-use-public-exports"],
    ["cycle", "no-circular-source-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 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([
        "modules/calendar/src/calendar.css",
        "modules/calendar/src/view.ASTRO",
      ]),
    );
    // 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("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 a module that owns React UI through the public module UI SDK", async () => {
    const result = await checkBoundaries(path.join(fixtures, "module-owns-react-ui"));

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

  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",
      ]),
    );
  });
});