HUMMBL MCP Server

import { describe, it, expect } from "vitest"; import { TRANSFORMATION_TYPES, isTransformationType, ok, err, isOk, isErr, type DomainError, isNotFoundError, } from "../types/domain.js"; describe("domain type helpers", () => { describe("isTransformationType", () => { it("accepts only known transformation keys", () => { for (const key of TRANSFORMATION_TYPES) { expect(isTransformationType(key)).toBe(true); } }); it("rejects non-string or unknown values", () => { expect(isTransformationType(42)).toBe(false); expect(isTransformationType("UNKNOWN")).toBe(false); }); }); describe("Result helpers", () => { it("creates ok result and passes through isOk/isErr guards", () => { const valueResult = ok("success"); expect(isOk(valueResult)).toBe(true); expect(isErr(valueResult)).toBe(false); if (valueResult.ok) { expect(valueResult.value).toBe("success"); } }); it("creates err result and identifies not found errors", () => { const error: DomainError = { type: "NotFound", entity: "model", code: "P1" }; const errorResult = err(error); expect(isErr(errorResult)).toBe(true); expect(isOk(errorResult)).toBe(false); expect(isNotFoundError(error)).toBe(true); }); it("recognizes non-NotFound errors", () => { const error: DomainError = { type: "ValidationError", message: "invalid" }; expect(isNotFoundError(error)).toBe(false); }); }); });