#!/usr/bin/env python3
#
# Copyright (c) 2021-2022 Paul Mattes.
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# pr3287 smoke tests

import unittest
from subprocess import Popen, PIPE, DEVNULL
import tempfile
import os
import sys
import Common.Test.playback as playback
import Common.Test.cti as cti

@unittest.skipIf(sys.platform.startswith('win'), 'Does not run on Windows')
@unittest.skipIf(sys.platform == 'cygwin', 'This does some very strange things on Cygwin')
class TestPr3287Smoke(cti.cti):

    # pr3287 smoke test
    def test_pr3287_smoke(self):

        # Start 'playback' to feed data to pr3287.
        port, ts = cti.unused_port()
        with playback.playback(self, 'pr3287/Test/smoke.trc', port=port) as p:
            ts.close()

            # Start pr3287.
            (po_handle, po_name) = tempfile.mkstemp()
            (sy_handle, sy_name) = tempfile.mkstemp()
            pr3287 = Popen(cti.vgwrap(["pr3287", "-command",
                f"cat >'{po_name}'; date >'{sy_name}'", f"127.0.0.1:{port}"]))
            self.children.append(pr3287)

            # Play the trace to pr3287.
            p.send_to_mark(1, send_tm=False)

            # Wait for the sync file to appear.
            self.try_until((lambda: (os.lseek(sy_handle, 0, os.SEEK_END) > 0)), 2, "pr3287 did not produce output")
            os.close(sy_handle)
            os.unlink(sy_name)

        # Wait for the processes to exit.
        pr3287.kill()
        self.children.remove(pr3287)
        self.vgwait(pr3287, assertOnFailure=False)

        # Read back the file.
        os.lseek(po_handle, 0, os.SEEK_SET)
        new_printout = os.read(po_handle, 65536)
        os.close(po_handle)
        os.unlink(po_name)

        # Compare.
        with open('pr3287/Test/smoke.out', 'rb') as file:
            ref_printout = file.read()

        self.assertEqual(new_printout, ref_printout)

if __name__ == '__main__':
    unittest.main()
