[1503] Basic Python test for b10-dhcp4 added.

src/bin/dhcp4/tests/Makefile.am

 PYCOVERAGE_RUN = @PYCOVERAGE_RUN@
 
+PYTESTS = dhcp4_test.py
+EXTRA_DIST = $(PYTESTS)
+
 # If necessary (rare cases), explicitly specify paths to dynamic libraries
 # required by loadable python modules.
 LIBRARY_PATH_PLACEHOLDER =
@@ -7,6 +10,15 @@ if SET_ENV_LIBRARY_PATH
 LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
+# test using command-line arguments, so use check-local target instead of TESTS
+check-local:
+	for pytest in $(PYTESTS) ; do \
+	echo Running test: $$pytest ; \
+	PYTHONPATH=$(COMMON_PYTHON_PATH):$(abs_top_srcdir)/src/bin:$(abs_top_builddir)/src/bin/bind10:$(abs_top_builddir)/src/lib/util/io/.libs \
+	$(LIBRARY_PATH_PLACEHOLDER) \
+		$(PYCOVERAGE_RUN) $(abs_srcdir)/$$pytest || exit ; \
+	done
+
 AM_CPPFLAGS = -I$(top_srcdir)/src/lib -I$(top_builddir)/src/lib
 AM_CPPFLAGS += -I$(top_builddir)/src/bin # for generated spec_config.h header
 AM_CPPFLAGS += -I$(top_srcdir)/src/bin

src/bin/dhcp4/tests/dhcp4_test.py

+# Copyright (C) 2011 Internet Systems Consortium.
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SYSTEMS CONSORTIUM
+# DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
+# INTERNET SYSTEMS CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT,
+# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
+# FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
+# NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
+# WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+from bind10_src import ProcessInfo, parse_args, dump_pid, unlink_pid_file, _BASETIME
+
+import unittest
+import sys
+import os
+import signal
+import socket
+from isc.net.addr import IPAddr
+import time
+import isc
+
+class TestDhcpv4Daemon(unittest.TestCase):
+    def setUp(self):
+        print("Note: Purpose of some of the tests is to check if DHCPv4 server can be started,")
+        print("      not that is can bind sockets correctly. Please ignore binding errors.")
+        # redirect stdout to a pipe so we can check that our
+        # process spawning is doing the right thing with stdout
+        self.old_stdout = os.dup(sys.stdout.fileno())
+        self.pipes = os.pipe()
+        os.dup2(self.pipes[1], sys.stdout.fileno())
+        os.close(self.pipes[1])
+        # note that we use dup2() to restore the original stdout
+        # to the main program ASAP in each test... this prevents
+        # hangs reading from the child process (as the pipe is only
+        # open in the child), and also insures nice pretty output
+
+    def tearDown(self):
+        # clean up our stdout munging
+        os.dup2(self.old_stdout, sys.stdout.fileno())
+        os.close(self.pipes[0])
+
+    def test_alive(self):
+        """
+        Simple test. Checks that b10-dhcp4 can be started and prints out info 
+        about starting DHCPv4 operation.
+        """
+        pi = ProcessInfo('Test Process', [ '../b10-dhcp4' , '-v' ])
+        pi.spawn()
+        time.sleep(1)
+        os.dup2(self.old_stdout, sys.stdout.fileno())
+        self.assertNotEqual(pi.process, None)
+        self.assertTrue(type(pi.pid) is int)
+        output = os.read(self.pipes[0], 4096)
+        self.assertEqual( str(output).count("[b10-dhcp4] Initiating DHCPv4 server operation."), 1)
+
+        # kill this process
+        # XXX: b10-dhcp6 is too dumb to understand 'shutdown' command for now,
+        #      so let's just kill the bastard
+
+        # TODO: Ignore errors for now. This test will be more thorough once ticket #1503
+        # (passing port number to b10-dhcp6 daemon) is implemented.
+        try:
+            os.kill(pi.pid, signal.SIGTERM)
+        except OSError:
+            print("Ignoring failed kill attempt. Process is dead already.")
+
+if __name__ == '__main__':
+    unittest.main()