def test_mul_nothing(capsys):
m = Menu()
m.do_mul('')
captured_out, captured_err = capsys.readouterr()
assert captured_out == 'Nothing to multiply\n'
def test_div_nothing(capsys):
m = Menu()
m.do_div('')
captured_out, captured_err = capsys.readouterr()
assert captured_out == 'Nothing to divide\n'
def test_sub_nothing(capsys):
m = Menu()
m.do_sub('')
captured_out, captured_err = capsys.readouterr()
assert captured_out == 'Nothing to subtract\n'
def test_add_nothing(capsys):
m = Menu()
m.do_add('')
captured_out, captured_err = capsys.readouterr()
assert captured_out == 'Nothing to add\n'
def test_div(capsys, instring, outstring):
m = Menu()
m.do_div(instring)
captured_out, captured_err = capsys.readouterr()
assert captured_out == f'{outstring}\n'
def test_eof():
m = Menu()
result = m.do_EOF('')
assert result == True
def test_precmd(capsys, instring, outstring):
m = Menu()
result = m.precmd(instring)
assert result == outstring