import 'package:halkyon_base_server/base.dart';
import 'package:test/test.dart';

// SIGN_IN_WAYS (ADR 0020, 1): the ways in an operator offers.

void main() {
  test('unset or empty, every way whose keys are there', () {
    expect(offeredWaysFrom(null), isNull);
    expect(offeredWaysFrom(''), isNull);
    expect(offeredWaysFrom('  '), isNull);
  });

  test('names one way or both, by commas or spaces, whatever their case', () {
    expect(offeredWaysFrom('simplelogin'), {OfferedWay.simpleLogin});
    expect(offeredWaysFrom('password'), {OfferedWay.password});
    expect(offeredWaysFrom('password, SimpleLogin'), {
      OfferedWay.password,
      OfferedWay.simpleLogin,
    });
    expect(offeredWaysFrom('simplelogin password'), hasLength(2));
  });

  test('refuses a way it does not know, so the server stops as it starts', () {
    for (final value in ['github', 'simplelogin,email', 'passwords']) {
      expect(
        () => offeredWaysFrom(value),
        throwsA(isA<StateError>()),
        reason: value,
      );
    }
  });
}