import mapytex

def test_default_render():
    assert mapytex.render.render_name == "txt"

def test_default_rending():
    e = mapytex.Expression("2*3")
    assert str(e) == "2*3"

def test_changing_render():
    assert mapytex.render.render_name == "txt"
    mapytex.render.set_render("tex")
    assert mapytex.render.render_name == "tex"
    mapytex.render.set_render("txt")
    assert mapytex.render.render_name == "txt"


def test_changing_rending():
    e = mapytex.Expression.from_str("2*3")
    f = mapytex.Fraction("2/3")
    assert str(e) == "2 * 3"
    assert str(f) == "2 / 3"
    mapytex.render.set_render("tex")
    assert str(e) == "2 \\times 3"
    assert str(f) == "\\dfrac{2}{3}"
    mapytex.render.set_render("txt")
    assert str(e) == "2 * 3"
    assert str(f) == "2 / 3"