from solution import welcome


def test_vega_mars():
    assert welcome("Vega", "Mars") == "Welcome, Vega from Mars."


def test_halo_earth():
    assert welcome("Halo", "Earth") == "Welcome, Halo from Earth."


def test_orbit_seven_europa():
    assert welcome("Orbit-7", "Europa") == "Welcome, Orbit-7 from Europa."