How to use the escpos.constants.SET_FONT function in escpos

def test_invert():
    instance = printer.Dummy()
    instance.set(invert=True)

    expected_sequence = (
        TXT_NORMAL, TXT_STYLE['size']['normal'],  # Normal text size
        TXT_STYLE['flip'][False],  # Flip OFF
        TXT_STYLE['smooth'][False],  # Smooth OFF
        TXT_STYLE['bold'][False],  # Bold OFF
        TXT_STYLE['underline'][0],  # Underline OFF
        SET_FONT(b'\x00'),  # Default font
        TXT_STYLE['align']['left'],  # Align left
        TXT_STYLE['invert'][True]  # Inverted ON
    )

    assert(instance.output == b''.join(expected_sequence))

def test_set_size_2x():
    instance = printer.Dummy()
    instance.set(double_height=True, double_width=True)

    expected_sequence = (
        TXT_NORMAL, TXT_STYLE['size']['2x'],  # Double text size
        TXT_STYLE['flip'][False],  # Flip OFF
        TXT_STYLE['smooth'][False],  # Smooth OFF
        TXT_STYLE['bold'][False],  # Bold OFF
        TXT_STYLE['underline'][0],  # Underline OFF
        SET_FONT(b'\x00'),  # Default font
        TXT_STYLE['align']['left'],  # Align left
        TXT_STYLE['invert'][False]  # Inverted OFF
    )

    assert (instance.output == b''.join(expected_sequence))

def test_set_underline2():
    instance = printer.Dummy()
    instance.set(underline=2)

    expected_sequence = (
        TXT_NORMAL, TXT_STYLE['size']['normal'],  # Normal text size
        TXT_STYLE['flip'][False],  # Flip OFF
        TXT_STYLE['smooth'][False],  # Smooth OFF
        TXT_STYLE['bold'][False],  # Bold OFF
        TXT_STYLE['underline'][2],  # Underline ON, type 2
        SET_FONT(b'\x00'),  # Default font
        TXT_STYLE['align']['left'],  # Align left
        TXT_STYLE['invert'][False]  # Inverted OFF
    )

    assert (instance.output == b''.join(expected_sequence))

def test_set_underline():
    instance = printer.Dummy()
    instance.set(underline=1)

    expected_sequence = (
        TXT_NORMAL, TXT_STYLE['size']['normal'],  # Normal text size
        TXT_STYLE['flip'][False],  # Flip OFF
        TXT_STYLE['smooth'][False],  # Smooth OFF
        TXT_STYLE['bold'][False],  # Bold OFF
        TXT_STYLE['underline'][1],  # Underline ON, type 1
        SET_FONT(b'\x00'),  # Default font
        TXT_STYLE['align']['left'],  # Align left
        TXT_STYLE['invert'][False]  # Inverted OFF
    )

    assert (instance.output == b''.join(expected_sequence))

def test_default_values():
    instance = printer.Dummy()
    instance.set()

    expected_sequence = (
        TXT_NORMAL, TXT_STYLE['size']['normal'],  # Normal text size
        TXT_STYLE['flip'][False],  # Flip OFF
        TXT_STYLE['smooth'][False],  # Smooth OFF
        TXT_STYLE['bold'][False],  # Bold OFF
        TXT_STYLE['underline'][0],  # Underline OFF
        SET_FONT(b'\x00'),  # Default font
        TXT_STYLE['align']['left'],  # Align left
        TXT_STYLE['invert'][False]  # Inverted OFF
    )

    assert(instance.output == b''.join(expected_sequence))

def test_smooth():
    instance = printer.Dummy()
    instance.set(smooth=True)

    expected_sequence = (
        TXT_NORMAL, TXT_STYLE['size']['normal'],  # Normal text size
        TXT_STYLE['flip'][False],  # Flip OFF
        TXT_STYLE['smooth'][True],  # Smooth ON
        TXT_STYLE['bold'][False],  # Bold OFF
        TXT_STYLE['underline'][0],  # Underline OFF
        SET_FONT(b'\x00'),  # Default font
        TXT_STYLE['align']['left'],  # Align left
        TXT_STYLE['invert'][False]  # Inverted OFF
    )

    assert(instance.output == b''.join(expected_sequence))

def test_align_right():
    instance = printer.Dummy()
    instance.set(align='right')

    expected_sequence = (
        TXT_NORMAL, TXT_STYLE['size']['normal'],  # Normal text size
        TXT_STYLE['flip'][False],  # Flip OFF
        TXT_STYLE['smooth'][False],  # Smooth OFF
        TXT_STYLE['bold'][False],  # Bold OFF
        TXT_STYLE['underline'][0],  # Underline OFF
        SET_FONT(b'\x00'),  # Default font
        TXT_STYLE['align']['right'],  # Align right
        TXT_STYLE['invert'][False]  # Inverted OFF
    )

    assert(instance.output == b''.join(expected_sequence))

def test_set_bold():
    instance = printer.Dummy()
    instance.set(bold=True)

    expected_sequence = (
        TXT_NORMAL, TXT_STYLE['size']['normal'],  # Normal text size
        TXT_STYLE['flip'][False],  # Flip OFF
        TXT_STYLE['smooth'][False],  # Smooth OFF
        TXT_STYLE['bold'][True],  # Bold ON
        TXT_STYLE['underline'][0],  # Underline OFF
        SET_FONT(b'\x00'),  # Default font
        TXT_STYLE['align']['left'],  # Align left
        TXT_STYLE['invert'][False]  # Inverted OFF
    )

    assert (instance.output == b''.join(expected_sequence))

def test_set_flip():
    instance = printer.Dummy()
    instance.set(flip=True)

    expected_sequence = (
        TXT_NORMAL, TXT_STYLE['size']['normal'],  # Normal text size
        TXT_STYLE['flip'][True],  # Flip ON
        TXT_STYLE['smooth'][False],  # Smooth OFF
        TXT_STYLE['bold'][False],  # Bold OFF
        TXT_STYLE['underline'][0],  # Underline OFF
        SET_FONT(b'\x00'),  # Default font
        TXT_STYLE['align']['left'],  # Align left
        TXT_STYLE['invert'][False]  # Inverted OFF
    )

    assert (instance.output == b''.join(expected_sequence))

def test_set_size_2w():
    instance = printer.Dummy()
    instance.set(double_width=True)

    expected_sequence = (
        TXT_NORMAL, TXT_STYLE['size']['2w'],  # Double width text size
        TXT_STYLE['flip'][False],  # Flip OFF
        TXT_STYLE['smooth'][False],  # Smooth OFF
        TXT_STYLE['bold'][False],  # Bold OFF
        TXT_STYLE['underline'][0],  # Underline OFF
        SET_FONT(b'\x00'),  # Default font
        TXT_STYLE['align']['left'],  # Align left
        TXT_STYLE['invert'][False]  # Inverted OFF
    )

    assert (instance.output == b''.join(expected_sequence))