80 lines
2.5 KiB
Python
Executable File
80 lines
2.5 KiB
Python
Executable File
# Copyright (c) 2013 by Gilbert Ramirez <gram@alumni.rice.edu>
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#
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# SPDX-License-Identifier: GPL-2.0-or-later
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import os
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import tempfile
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import unittest
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from dftestlib import util
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# The binaries to use. We assume we are running
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# from the top of the wireshark distro
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TSHARK = os.path.join(os.getenv("WS_BIN_PATH", "."), "tshark")
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class DFTest(unittest.TestCase):
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"""Base class for all tests in this dfilter-test collection."""
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# Remove these file when finished (in tearDownClass)
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files_to_remove = []
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@classmethod
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def setUpClass(cls):
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"""Create the trace file to be used in the tests."""
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assert cls.trace_file
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# if the class sets the 'trace_file' field, then it
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# names the trace file to use for the tests. It *should*
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# reside in dftestfiles
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assert not os.path.isabs(cls.trace_file)
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cls.trace_file = os.path.join(os.getenv("SOURCE_DIR", "."), "tools",
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"dftestfiles", cls.trace_file)
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@classmethod
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def tearDownClass(cls):
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"""Remove the trace file used in the tests."""
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for filename in cls.files_to_remove:
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if os.path.exists(filename):
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try:
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os.remove(filename)
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except OSError:
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pass
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def runDFilter(self, dfilter):
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# Create the tshark command
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cmdv = [TSHARK,
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"-n", # No name resolution
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"-r", # Next arg is trace file to read
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self.trace_file,
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"-Y", # packet display filter (used to be -R)
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dfilter]
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(status, output) = util.exec_cmdv(cmdv)
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return status, output
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def assertDFilterCount(self, dfilter, expected_count):
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"""Run a display filter and expect a certain number of packets."""
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(status, output) = self.runDFilter(dfilter)
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# tshark must succeed
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self.assertEqual(status, util.SUCCESS, output)
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# Split the output (one big string) into lines, removing
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# empty lines (extra newline at end of output)
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lines = [L for L in output.split("\n") if L != ""]
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msg = "Expected %d, got: %s" % (expected_count, output)
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self.assertEqual(len(lines), expected_count, msg)
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def assertDFilterFail(self, dfilter):
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"""Run a display filter and expect tshark to fail"""
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(status, output) = self.runDFilter(dfilter)
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# tshark must succeed
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self.assertNotEqual(status, util.SUCCESS, output)
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