@clickup/pg-microsharding/src/internal/__tests__/chooseDsns.test.ts

Microshards support for PostgreSQL

import { chooseDsns } from "../chooseDsns";

let savedEnv: typeof process.env;

beforeEach(() => {
  savedEnv = { ...process.env };
  process.env["PGPORT"] = "";
  process.env["PGUSER"] = "test";
  process.env["PGPASSWORD"] = "test";
  process.env["PGDATABASE"] = "test";
});

afterEach(() => {
  Object.assign(process.env, savedEnv);
});

test("matches", () => {
  expect(
    chooseDsns({
      patterns: ["ho"],
      existingDsns: ["postgresql://host/db"],
      requireMatch: true,
    }),
  ).toEqual([["postgresql://test:test@host/db"], []]);

  expect(
    chooseDsns({
      patterns: ["host2"],
      existingDsns: ["postgresql://host1/db", "postgresql://host2/db"],
      requireMatch: true,
    }),
  ).toEqual([["postgresql://test:test@host2/db"], []]);

  expect(
    chooseDsns({
      patterns: ["host/db"],
      existingDsns: ["postgresql://host/db", "postgresql://host/db2"],
      requireMatch: true,
    }),
  ).toEqual([["postgresql://test:test@host/db"], []]);
});

test("no match", () => {
  expect(
    chooseDsns({
      patterns: ["some"],
      existingDsns: ["postgresql://host1/db", "postgresql://host2/db"],
      requireMatch: false,
    }),
  ).toEqual([["postgresql://test:test@some/test"], []]);

  expect(() =>
    chooseDsns({
      patterns: ["some"],
      existingDsns: ["postgresql://host1/db", "postgresql://host2/db"],
      requireMatch: true,
    }),
  ).toThrow('No DSNs match "some".');
});

test("multiple matches", () => {
  expect(
    chooseDsns({
      patterns: ["ho"],
      existingDsns: ["postgresql://host1/db", "postgresql://host2/db"],
      requireMatch: false,
    }),
  ).toEqual([
    ["postgresql://test:test@ho/test"],
    ['Hint: multiple DSNs match "ho", so treating it as an entire DSN.'],
  ]);

  expect(() =>
    chooseDsns({
      patterns: ["ho"],
      existingDsns: ["postgresql://host1/db", "postgresql://host2/db"],
      requireMatch: true,
    }),
  ).toThrow('Multiple DSNs match "ho".');

  expect(
    chooseDsns({
      patterns: ["host1"],
      existingDsns: ["postgresql://host1/db", "postgresql://host2/db"],
      requireMatch: true,
    }),
  ).toEqual([["postgresql://test:test@host1/db"], []]);
});