30 lines
908 B
Python
30 lines
908 B
Python
#!/usr/bin/python
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"""basic test case that simulates an empty capability file
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:author: `Patrick Kanzler <dev@pkanzler.de>`_
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:organization: `python-escpos <https://github.com/python-escpos>`_
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:copyright: Copyright (c) 2016 `python-escpos <https://github.com/python-escpos>`_
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:license: MIT
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"""
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import os
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import tempfile
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import pytest
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def test_instantiation() -> None:
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"""test the instantiation of a escpos-printer class"""
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# inject an environment variable that points to an empty capabilities file
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os.environ["ESCPOS_CAPABILITIES_FILE"] = tempfile.NamedTemporaryFile().name
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import escpos.printer as printer
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from escpos.exceptions import BarcodeTypeError
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# remove again the variable (so that no other tests are affected)
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os.environ.pop("ESCPOS_CAPABILITIES_FILE")
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instance = printer.Dummy()
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with pytest.raises(BarcodeTypeError):
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instance.barcode("bc", "code")
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