from playwright.sync_api import Page, expect


def test_dashboard_loads_and_has_title(page: Page):
    """Verify the dashboard page loads and the title is correct."""
    expect(page).to_have_title("Dashboard · CalMiner")


def test_dashboard_shows_summary_metrics_panel(page: Page):
    """Check that the summary metrics panel is visible."""
    expect(page.locator("h2:has-text('Operations Overview')")).to_be_visible()


def test_dashboard_renders_cost_chart(page: Page):
    """Ensure the scenario cost chart canvas is present."""
    expect(page.locator("#cost-chart")).to_be_attached()
    expect(page.locator("#cost-chart-empty")).to_be_visible()