agentic-dev/packages/core-eslint/rules/atomic-tier-import-direction.test.js

import { describe, it } from "vitest";
import { RuleTester } from "eslint";
import rule from "./atomic-tier-import-direction.js";

const tester = new RuleTester({
  languageOptions: {
    parser: await import("@typescript-eslint/parser"),
    ecmaVersion: "latest",
    sourceType: "module",
    parserOptions: { ecmaFeatures: { jsx: true } },
  },
});

describe("atomic-tier-import-direction", () => {
  it("passes when an organism imports from atoms", () => {
    tester.run("atomic-tier-import-direction", rule, {
      valid: [
        {
          filename: "/repo/packages/core-ui/src/organisms/Card/Card.tsx",
          code: `import { Button } from "../../atoms/Button/Button";`,
        },
      ],
      invalid: [],
    });
  });

  it("fires when an atom imports from organisms", () => {
    tester.run("atomic-tier-import-direction", rule, {
      valid: [],
      invalid: [
        {
          filename: "/repo/packages/core-ui/src/atoms/Button/Button.tsx",
          code: `import { Card } from "../../organisms/Card/Card";`,
          errors: [
            {
              messageId: "wrongDirection",
              data: {
                fromTier: "atoms",
                toTier: "organisms",
                importPath: "../../organisms/Card/Card",
              },
            },
          ],
        },
      ],
    });
  });

  it("is a no-op for files outside any tier folder", () => {
    tester.run("atomic-tier-import-direction", rule, {
      valid: [
        {
          filename:
            "/repo/packages/auth/src/application/use-cases/sign-in.use-case.ts",
          code: `export const x = 1;`,
        },
      ],
      invalid: [],
    });
  });

  it("passes for same-tier imports", () => {
    tester.run("atomic-tier-import-direction", rule, {
      valid: [
        {
          filename:
            "/repo/packages/core-ui/src/molecules/SearchBar/SearchBar.tsx",
          code: `import { FormField } from "../FormField/FormField";`,
        },
      ],
      invalid: [],
    });
  });
});