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"""Tests for tap2pcap."""
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from __future__ import print_function
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import os
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import subprocess as sp
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import sys
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import tap2pcap
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# Validate that the tapped trace when run through tap2cap | tshark matches
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# a golden output file for the tshark dump. Since we run tap2pcap in a
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# subshell with a limited environment, the inferred time zone should be UTC.
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if __name__ == '__main__':
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srcdir = os.path.join(os.getenv('TEST_SRCDIR'), 'envoy_api_canonical')
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tap_path = os.path.join(srcdir, 'tools/data/tap2pcap_h2_ipv4.pb_text')
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expected_path = os.path.join(srcdir, 'tools/data/tap2pcap_h2_ipv4.txt')
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pcap_path = os.path.join(os.getenv('TEST_TMPDIR'), 'generated.pcap')
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tap2pcap.Tap2Pcap(tap_path, pcap_path)
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actual_output = sp.check_output(['tshark', '-r', pcap_path, '-d', 'tcp.port==10000,http2', '-P'])
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with open(expected_path, 'r') as f:
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expected_output = f.read()
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if actual_output != expected_output:
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print('Mismatch')
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print('Expected: %s' % expected_output)
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print('Actual: %s' % actual_output)
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sys.exit(1)
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