WRNexusJS/packages/validation/test/validation.test.ts

import { test, expect } from "bun:test";
import { v, invalid, parseBody, checkField, parseEnv } from "../src/index.ts";

const login = v.object({
  email: v.string().email(),
  password: v.string().min(8, "too short"),
  age: v.number().min(18).optional(),
});

test("parse coerces valid input and reports no errors", () => {
  const r = login.parse({ email: "a@b.com", password: "secretpw", age: "25" });
  expect(r.ok).toBe(true);
  expect(r.value).toEqual({ email: "a@b.com", password: "secretpw", age: 25 });
  expect(r.errors).toEqual({});
});

test("parse reports per-field errors with custom messages", () => {
  const r = login.parse({ email: "nope", password: "x" });
  expect(r.ok).toBe(false);
  expect(r.errors.email).toBe("Must be a valid email");
  expect(r.errors.password).toBe("too short");
});

test("optional fields may be omitted", () => {
  const r = login.parse({ email: "a@b.com", password: "longenough" });
  expect(r.ok).toBe(true);
  expect(r.value.age).toBeUndefined();
});

test("required (non-optional) empty fields fail", () => {
  const r = login.parse({});
  expect(r.errors.email).toBe("Required");
  expect(r.errors.password).toBe("Required");
});

test("describe emits a JSON descriptor", () => {
  const d = login.describe();
  expect(d.type).toBe("object");
  expect(d.fields.email.rules).toContainEqual({ kind: "email" });
  expect(d.fields.age.optional).toBe(true);
});

test("checkField coerces and applies rules", () => {
  expect(checkField({ type: "number", rules: [{ kind: "min", n: 18 }] }, "5").error).toBe(
    "Must be at least 18",
  );
  expect(checkField({ type: "number", rules: [{ kind: "min", n: 18 }] }, "20").value).toBe(20);
  expect(checkField({ type: "string", optional: true, rules: [] }, "").error).toBeNull();
});

test("invalid() returns a 400 with errors", async () => {
  const res = invalid({ email: "bad" });
  expect(res.status).toBe(400);
  expect(await res.json()).toEqual({ ok: false, errors: { email: "bad" } });
});

test("parseBody reads JSON and form-encoded bodies", async () => {
  const jsonReq = new Request("http://x", {
    method: "POST",
    headers: { "content-type": "application/json" },
    body: JSON.stringify({ email: "a@b.com", password: "longenough" }),
  });
  const j = await parseBody(login, jsonReq);
  expect(j.ok).toBe(true);

  const formReq = new Request("http://x", {
    method: "POST",
    headers: { "content-type": "application/x-www-form-urlencoded" },
    body: "email=a@b.com&password=longenough",
  });
  const f = await parseBody(login, formReq);
  expect(f.ok).toBe(true);
});

test("new string rules: url, uuid, date, length, oneOf, trim", () => {
  const s = v.object({
    site: v.string().url(),
    id: v.string().uuid(),
    when: v.string().date(),
    code: v.string().length(4),
    role: v.string().oneOf(["admin", "user"]),
    name: v.string().trim().min(2),
  });
  const ok = s.parse({
    site: "https://x.com/a",
    id: "123e4567-e89b-12d3-a456-426614174000",
    when: "2026-01-01",
    code: "ABCD",
    role: "admin",
    name: "  Ada  ",
  });
  expect(ok.ok).toBe(true);
  expect(ok.value.name).toBe("Ada"); // trimmed

  const bad = s.parse({
    site: "not-a-url",
    id: "nope",
    when: "not-a-date",
    code: "AB",
    role: "root",
    name: " a ",
  });
  expect(bad.ok).toBe(false);
  expect(Object.keys(bad.errors).sort()).toEqual(["code", "id", "name", "role", "site", "when"]);
});

test("number rules: positive, oneOf", () => {
  const s = v.object({ qty: v.number().positive(), size: v.number().oneOf([1, 2, 3]) });
  expect(s.parse({ qty: "5", size: "2" }).ok).toBe(true);
  expect(s.parse({ qty: "-1", size: "9" }).ok).toBe(false);
});

test("default() fills absent fields; refine() runs server-side", () => {
  const s = v.object({
    role: v.string().default("user"),
    even: v.number().refine((n) => (n as number) % 2 === 0, "Must be even"),
  });
  const r = s.parse({ even: 4 });
  expect(r.ok).toBe(true);
  expect(r.value.role).toBe("user"); // default applied
  const bad = s.parse({ even: 3 });
  expect(bad.ok).toBe(false);
  expect(bad.errors.even).toBe("Must be even");
});

const envSchema = v.object({
  DATABASE_URL: v.string().min(1),
  PORT: v.number(),
  DEBUG: v.boolean().optional(),
});

test("parseEnv coerces and returns typed values", () => {
  const env = parseEnv<{ DATABASE_URL: string; PORT: number; DEBUG?: boolean }>(envSchema, {
    DATABASE_URL: "sqlite://dev.db",
    PORT: "3000",
    DEBUG: "true",
  });
  expect(env.DATABASE_URL).toBe("sqlite://dev.db");
  expect(env.PORT).toBe(3000);
  expect(env.DEBUG).toBe(true);
});

test("parseEnv throws one readable error listing every missing/invalid var", () => {
  let message = "";
  try {
    parseEnv(envSchema, { PORT: "not-a-number" });
  } catch (err) {
    message = (err as Error).message;
  }
  expect(message).toContain("Invalid environment variables");
  expect(message).toContain("DATABASE_URL");
  expect(message).toContain("PORT");
});

test("parseEnv defaults to reading the ambient environment", () => {
  process.env.WIRE_TEST_ENV_VAR = "present";
  const env = parseEnv<{ WIRE_TEST_ENV_VAR: string }>(
    v.object({ WIRE_TEST_ENV_VAR: v.string().min(1) }),
  );
  expect(env.WIRE_TEST_ENV_VAR).toBe("present");
  delete process.env.WIRE_TEST_ENV_VAR;
});