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braveheuelpatkan
braveheuel
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patkan
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Feature/clear content in dummy printer (#271)
Add Function to Dummy Printer for Clearing Buffer If you are using the dummy printer, you may want to use the printer again after sending the output to a physical printer. This method empties the list of the output buffer.
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‎src/escpos/printer.py‎

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@@ -312,5 +312,13 @@ def output(self):
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""" Get the data that was sent to this printer """
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return b''.join(self._output_list)
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def clear(self):
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""" Clear the buffer of the printer
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This method can be called if you send the contents to a physical printer
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and want to use the Dummy printer for new output.
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"""
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del self._output_list[:]
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def close(self):
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pass

‎test/test_function_dummy_clear.py‎

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from nose.tools import assert_raises
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from escpos.printer import Dummy
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def test_printer_dummy_clear():
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printer = Dummy()
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printer.text("Hello")
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printer.clear()
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assert(printer.output == b'')

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