import { describe, it, expect } from 'vitest';
import { findOrFail } from '../e2e/support/findOrFail';

interface Row {
  id: number;
  name: string;
}

const rows: Row[] = [
  { id: 1, name: 'first' },
  { id: 2, name: 'second' }
];

describe('findOrFail', () => {
  it('returns the matching row', () => {
    expect(findOrFail(rows, (r) => r.name === 'second', 'the second row')).toEqual({
      id: 2,
      name: 'second'
    });
  });

  it('returns the first match when several qualify', () => {
    expect(findOrFail(rows, () => true, 'anything').id).toBe(1);
  });

  // The whole point. Dereferencing a missed `.find()` gives "Cannot read
  // properties of undefined" pointing at test plumbing; this says what was
  // wanted and how many rows were searched.
  it('throws naming what it looked for', () => {
    expect(() => findOrFail(rows, (r) => r.name === 'absent', 'the absent row')).toThrow(
      /the absent row/
    );
  });

  it('reports how many rows it searched', () => {
    expect(() => findOrFail(rows, () => false, 'nothing')).toThrow(/2 rows/);
  });

  it('says so when the collection was empty, which reads differently', () => {
    expect(() => findOrFail([], () => true, 'anything')).toThrow(/0 rows/);
  });
});