Ekklesia/core/tests/identity-database.test.ts

import type { Pool } from "pg";
import { describe, expect, it, vi } from "vitest";

const poolConstructor = vi.hoisted(() => vi.fn());

vi.mock("pg", () => ({ Pool: poolConstructor }));

import {
  createIdentityDrizzleDatabase,
  createIdentityDrizzleView,
  IdentityDatabaseError,
} from "../src/identity/database.js";

describe("Core identity Drizzle database composition", () => {
  it("does not construct a pool merely because the module is imported", () => {
    expect(poolConstructor).not.toHaveBeenCalled();
  });

  it.each([
    "",
    "   ",
    "not-a-database-url",
    "https://admin:[email protected]/database",
  ])("rejects an invalid connection string without exposing it (%s)", (connectionString) => {
    let captured: unknown;
    try {
      createIdentityDrizzleDatabase(connectionString);
    } catch (error) {
      captured = error;
    }

    expect(captured).toBeInstanceOf(IdentityDatabaseError);
    expect(captured).toMatchObject({ code: "IDENTITY_DATABASE_CONFIGURATION_INVALID" });
    const publicText = `${String(captured)}\n${
      captured instanceof Error ? (captured.stack ?? "") : ""
    }`;
    if (connectionString) {
      expect(publicText).not.toContain(connectionString);
    }
    expect(poolConstructor).not.toHaveBeenCalled();
  });

  it("explicitly constructs the pool only when called, with the identity schema attached", () => {
    poolConstructor.mockImplementation(function fakePool() {
      return { end: async () => undefined, on: vi.fn() };
    });

    const handle = createIdentityDrizzleDatabase(
      "postgresql://operator:[email protected]/ekklesia",
    );

    expect(poolConstructor).toHaveBeenCalledTimes(1);
    expect(handle.db).toBeDefined();
    expect(typeof handle.close).toBe("function");
    expect(Object.isFrozen(handle)).toBe(true);
  });

  it("passes the connection timeout through to the pool configuration", () => {
    poolConstructor.mockImplementation(function fakePool() {
      return { end: async () => undefined, on: vi.fn() };
    });
    poolConstructor.mockClear();

    createIdentityDrizzleDatabase("postgresql://example.test/ekklesia", {
      connectionTimeoutMs: 5_000,
    });

    expect(poolConstructor).toHaveBeenCalledWith(
      expect.objectContaining({ connectionTimeoutMillis: 5_000 }),
    );
  });

  it("passes the operation timeout through to the pool configuration as both query_timeout and statement_timeout", () => {
    poolConstructor.mockImplementation(function fakePool() {
      return { end: async () => undefined, on: vi.fn() };
    });
    poolConstructor.mockClear();

    createIdentityDrizzleDatabase("postgresql://example.test/ekklesia", {
      operationTimeoutMs: 7_500,
    });

    expect(poolConstructor).toHaveBeenCalledWith(
      expect.objectContaining({ query_timeout: 7_500, statement_timeout: 7_500 }),
    );
  });

  it("does not set query_timeout, statement_timeout, or connectionTimeoutMillis when no timeout is configured", () => {
    poolConstructor.mockImplementation(function fakePool() {
      return { end: async () => undefined, on: vi.fn() };
    });
    poolConstructor.mockClear();

    createIdentityDrizzleDatabase("postgresql://example.test/ekklesia");

    const [poolConfig] = poolConstructor.mock.calls[0] as [Record<string, unknown>];
    expect(poolConfig).not.toHaveProperty("query_timeout");
    expect(poolConfig).not.toHaveProperty("statement_timeout");
    expect(poolConfig).not.toHaveProperty("connectionTimeoutMillis");
  });

  it.each([
    ["operationTimeoutMs", 0],
    ["operationTimeoutMs", -1],
    ["operationTimeoutMs", Number.NaN],
    ["operationTimeoutMs", 1.5],
    ["operationTimeoutMs", 2_147_483_648],
    ["connectionTimeoutMs", 0],
    ["connectionTimeoutMs", -1],
    ["connectionTimeoutMs", Number.NaN],
  ] as const)("rejects an invalid %s (%s) without constructing a pool and without leaking the value", (optionName, value) => {
    poolConstructor.mockClear();

    let captured: unknown;
    try {
      createIdentityDrizzleDatabase("postgresql://example.test/ekklesia", {
        [optionName]: value,
      });
    } catch (error) {
      captured = error;
    }

    expect(captured).toBeInstanceOf(IdentityDatabaseError);
    expect(captured).toMatchObject({ code: "IDENTITY_DATABASE_CONFIGURATION_INVALID" });
    const publicText = `${String(captured)}\n${
      captured instanceof Error ? (captured.stack ?? "") : ""
    }`;
    expect(publicText).not.toContain(String(value));
    expect(poolConstructor).not.toHaveBeenCalled();
  });

  it("registers a pool-level error listener so an idle client failure never becomes an uncaught exception", () => {
    const on = vi.fn();
    poolConstructor.mockImplementation(function fakePool() {
      return { end: async () => undefined, on };
    });

    createIdentityDrizzleDatabase("postgresql://example.test/ekklesia");

    expect(on).toHaveBeenCalledWith("error", expect.any(Function));
    const handler = on.mock.calls.find((call) => call[0] === "error")?.[1] as
      | ((error: unknown) => void)
      | undefined;
    expect(() =>
      handler?.(new Error("terminating connection due to administrator command")),
    ).not.toThrow();
  });
});

describe("createIdentityDrizzleView", () => {
  it("wraps an externally owned pool without constructing, registering an error listener on, or closing one itself", () => {
    poolConstructor.mockClear();
    const fakePool = { end: vi.fn(), on: vi.fn(), query: vi.fn() };

    // A minimal fake pg.Pool double is sufficient — this test proves createIdentityDrizzleView
    // never touches the pool beyond wrapping it.
    const db = createIdentityDrizzleView(fakePool as unknown as Pool);

    expect(db).toBeDefined();
    expect(poolConstructor).not.toHaveBeenCalled();
    expect(fakePool.on).not.toHaveBeenCalled();
    expect(fakePool.end).not.toHaveBeenCalled();
  });
});