oblique-strategies-cli/src/presenters/__tests__/centered.test.ts

import wrapAnsi from 'wrap-ansi';
import {
  afterAll,
  beforeAll,
  describe,
  expect,
  it, SpyInstanceFn,
  vi,
} from 'vitest';
import centered from '../centered';

vi.mock('wrap-ansi');

describe('centered', () => {
  let log: SpyInstanceFn<[], void>;

  let defaultConsole: typeof console;
  beforeAll(() => {
    defaultConsole = console;
    log = vi.fn();
    global.console = {
      log,
    } as unknown as typeof console;
  });

  afterAll(() => {
    global.console = defaultConsole;
  });

  it('calls wrap and ensures console has an assumed width of 80 text columns', async () => {
    const defaultColumns = process.stdout.columns;
    process.stdout.columns = undefined as unknown as typeof process.stdout.columns;
    await centered()('foo\n-italic');
    expect(wrapAnsi).toBeCalledWith('foo\n-italic', 80, { hard: true, trim: true });
    process.stdout.columns = defaultColumns;
  });

  it('calls wrap and respects current text column count', async () => {
    const defaultColumns = process.stdout.columns;
    process.stdout.columns = 420;
    await centered()('foo\n-italic');
    expect(wrapAnsi).toBeCalledWith('foo\n-italic', 420, { hard: true, trim: true });
    process.stdout.columns = defaultColumns;
  });

  it('calls the console output function', async () => {
    await centered()('foo\n-italic');
    expect(log).toBeCalled();
  });
});