bristol-eurostar/tests/test_app.py

import app as app_module


def _client():
    app_module.app.config['TESTING'] = True
    return app_module.app.test_client()


def _stub_data(monkeypatch, prices=None):
    monkeypatch.setattr(app_module, 'get_cached', lambda key, ttl=None: None)
    monkeypatch.setattr(app_module, 'set_cached', lambda key, data: None)
    monkeypatch.setattr(
        app_module.rtt_scraper,
        'fetch',
        lambda travel_date, user_agent: [
            {'depart_bristol': '07:00', 'arrive_paddington': '08:45', 'headcode': '1A23'},
        ],
    )
    monkeypatch.setattr(
        app_module.eurostar_scraper,
        'fetch',
        lambda destination, travel_date, user_agent: [
            {
                'depart_st_pancras': '10:01',
                'arrive_destination': '13:34',
                'destination': destination,
                'train_number': 'ES 9014',
            },
        ],
    )
    monkeypatch.setattr(
        app_module.eurostar_scraper,
        'timetable_url',
        lambda destination: f'https://example.test/{destination.lower().replace(" ", "-")}',
    )
    _prices = prices if prices is not None else {}
    monkeypatch.setattr(app_module, 'fetch_eurostar_prices', lambda dest, date: _prices)


def test_index_shows_fixed_departure_and_destination_radios():
    client = _client()

    resp = client.get('/')
    html = resp.get_data(as_text=True)

    assert resp.status_code == 200
    assert 'Departure point' in html
    assert 'Bristol Temple Meads' in html
    assert html.count('type="radio"') == len(app_module.DESTINATIONS)
    assert 'destination-rotterdam' in html


def test_search_redirects_to_results_with_selected_params():
    client = _client()

    resp = client.get('/search?destination=rotterdam&travel_date=2026-04-10&min_connection=60&max_connection=120')

    assert resp.status_code == 302
    assert resp.headers['Location'].endswith(
        '/results/rotterdam/2026-04-10?min_connection=60&max_connection=120'
    )


def test_results_shows_same_day_destination_switcher(monkeypatch):
    _stub_data(monkeypatch)
    client = _client()

    resp = client.get('/results/paris/2026-04-10?min_connection=60&max_connection=120')
    html = resp.get_data(as_text=True)

    assert resp.status_code == 200
    assert 'Switch destination for Friday 10 April 2026' in html
    assert '<span class="chip-current">Paris Gare du Nord</span>' in html
    assert '/results/brussels/2026-04-10?min_connection=60&amp;max_connection=120' in html
    assert '/results/rotterdam/2026-04-10?min_connection=60&amp;max_connection=120' in html
    assert 'ES 9014' in html


def test_results_title_and_social_meta_include_destination(monkeypatch):
    _stub_data(monkeypatch)
    client = _client()

    resp = client.get('/results/lille/2026-04-10?min_connection=60&max_connection=120')
    html = resp.get_data(as_text=True)

    assert resp.status_code == 200
    assert '<title>Bristol to Lille Europe via Eurostar</title>' in html
    assert '<meta property="og:title" content="Bristol to Lille Europe via Eurostar">' in html
    assert (
        '<meta property="og:description" content="Train options from Bristol Temple Meads '
        'to Lille Europe on Friday 10 April 2026 via Paddington, St Pancras, and Eurostar.">'
    ) in html
    assert '<meta property="og:url" content="http://localhost/results/lille/2026-04-10?min_connection=60&amp;max_connection=120">' in html


def test_results_marks_trips_within_five_minutes_of_fastest_and_slowest(monkeypatch):
    monkeypatch.setattr(app_module, 'get_cached', lambda key, ttl=None: None)
    monkeypatch.setattr(app_module, 'set_cached', lambda key, data: None)
    monkeypatch.setattr(app_module, 'fetch_eurostar_prices', lambda dest, date: {})
    monkeypatch.setattr(
        app_module.rtt_scraper,
        'fetch',
        lambda travel_date, user_agent: [
            {'depart_bristol': '07:00', 'arrive_paddington': '08:30', 'headcode': '1A01'},
            {'depart_bristol': '07:05', 'arrive_paddington': '08:36', 'headcode': '1A02'},
            {'depart_bristol': '07:10', 'arrive_paddington': '08:46', 'headcode': '1A03'},
            {'depart_bristol': '07:15', 'arrive_paddington': '08:56', 'headcode': '1A04'},
            {'depart_bristol': '07:20', 'arrive_paddington': '09:06', 'headcode': '1A05'},
        ],
    )
    monkeypatch.setattr(
        app_module.eurostar_scraper,
        'fetch',
        lambda destination, travel_date, user_agent: [
            {
                'depart_st_pancras': '09:30',
                'arrive_destination': '11:50',
                'destination': destination,
                'train_number': 'ES 1001',
            },
            {
                'depart_st_pancras': '09:40',
                'arrive_destination': '12:00',
                'destination': destination,
                'train_number': 'ES 1002',
            },
            {
                'depart_st_pancras': '09:50',
                'arrive_destination': '12:20',
                'destination': destination,
                'train_number': 'ES 1003',
            },
            {
                'depart_st_pancras': '10:00',
                'arrive_destination': '12:35',
                'destination': destination,
                'train_number': 'ES 1004',
            },
            {
                'depart_st_pancras': '10:10',
                'arrive_destination': '12:45',
                'destination': destination,
                'train_number': 'ES 1005',
            },
        ],
    )
    monkeypatch.setattr(
        app_module.eurostar_scraper,
        'timetable_url',
        lambda destination: f'https://example.test/{destination.lower().replace(" ", "-")}',
    )
    client = _client()

    resp = client.get('/results/paris/2026-04-10?min_connection=60&max_connection=120')
    html = resp.get_data(as_text=True)

    assert resp.status_code == 200
    assert html.count('title="Fastest option"') == 2
    assert html.count('title="Slowest option"') == 2
    assert '4h 50m ⚡' in html
    assert '4h 55m ⚡' in html
    assert '5h 20m 🐢' in html
    assert '5h 25m 🐢' in html
    assert '5h 10m ⚡' not in html
    assert '5h 10m 🐢' not in html


def test_results_shows_unreachable_morning_eurostar_services(monkeypatch):
    monkeypatch.setattr(app_module, 'get_cached', lambda key, ttl=None: None)
    monkeypatch.setattr(app_module, 'set_cached', lambda key, data: None)
    monkeypatch.setattr(app_module, 'fetch_eurostar_prices', lambda dest, date: {})
    monkeypatch.setattr(
        app_module.rtt_scraper,
        'fetch',
        lambda travel_date, user_agent: [
            {'depart_bristol': '07:00', 'arrive_paddington': '08:45', 'headcode': '1A23'},
        ],
    )
    monkeypatch.setattr(
        app_module.eurostar_scraper,
        'fetch',
        lambda destination, travel_date, user_agent: [
            {
                'depart_st_pancras': '09:30',
                'arrive_destination': '12:00',
                'destination': destination,
                'train_number': 'ES 9001',
            },
            {
                'depart_st_pancras': '10:15',
                'arrive_destination': '13:40',
                'destination': destination,
                'train_number': 'ES 9002',
            },
            {
                'depart_st_pancras': '12:30',
                'arrive_destination': '15:55',
                'destination': destination,
                'train_number': 'ES 9003',
            },
        ],
    )
    monkeypatch.setattr(
        app_module.eurostar_scraper,
        'timetable_url',
        lambda destination: f'https://example.test/{destination.lower().replace(" ", "-")}',
    )
    client = _client()

    resp = client.get('/results/paris/2026-04-10?min_connection=60&max_connection=120')
    html = resp.get_data(as_text=True)

    assert resp.status_code == 200
    assert '1 morning service unavailable from Bristol' in html
    assert '09:30' in html
    assert 'ES 9001' in html
    assert 'Unavailable from Bristol' in html
    assert 'Morning means Eurostar departures before 12:00 from St&nbsp;Pancras.' in html
    assert html.index('09:30') < html.index('10:15')


def test_results_shows_eurostar_price_and_total(monkeypatch):
    # 07:00 on Friday 2026-04-10 → Anytime £138.70 (weekday, 05:05–08:25 window)
    _stub_data(monkeypatch, prices={'10:01': 59})
    client = _client()

    resp = client.get('/results/paris/2026-04-10?min_connection=60&max_connection=120')
    html = resp.get_data(as_text=True)

    assert resp.status_code == 200
    assert '£59' in html                    # Eurostar Standard price
    assert '£197.70' in html               # Anytime £138.70 + ES £59


def test_results_can_show_only_unreachable_morning_services(monkeypatch):
    monkeypatch.setattr(app_module, 'get_cached', lambda key, ttl=None: None)
    monkeypatch.setattr(app_module, 'set_cached', lambda key, data: None)
    monkeypatch.setattr(app_module, 'fetch_eurostar_prices', lambda dest, date: {})
    monkeypatch.setattr(
        app_module.rtt_scraper,
        'fetch',
        lambda travel_date, user_agent: [
            {'depart_bristol': '07:00', 'arrive_paddington': '08:45', 'headcode': '1A23'},
        ],
    )
    monkeypatch.setattr(
        app_module.eurostar_scraper,
        'fetch',
        lambda destination, travel_date, user_agent: [
            {
                'depart_st_pancras': '09:30',
                'arrive_destination': '12:00',
                'destination': destination,
                'train_number': 'ES 9001',
            },
        ],
    )
    monkeypatch.setattr(
        app_module.eurostar_scraper,
        'timetable_url',
        lambda destination: f'https://example.test/{destination.lower().replace(" ", "-")}',
    )
    client = _client()

    resp = client.get('/results/paris/2026-04-10?min_connection=60&max_connection=120')
    html = resp.get_data(as_text=True)

    assert resp.status_code == 200
    assert 'No valid journeys found.' not in html
    assert '1 morning service unavailable from Bristol' in html
    assert '09:30' in html
    assert 'Unavailable from Bristol' in html