test: moved all setup/teardown into the python realm

tests/environment/notneeded_rtu_slave_runner.sh

@@ -1,28 +0,0 @@
-#!/usr/bin/env bash
-
-RTU_SLAVE_PID=/tmp/rtu_slave.pid
-
-CURRENT_DIR="$(dirname "$(realpath "$0")")"
-. $CURRENT_DIR/subprocess_helper.sh
-
-check_preconditions() {
-    python -c "import pymodbus" || exit 1
-}
-
-# check argument count
-## https://stackoverflow.com/questions/4341630/checking-for-the-correct-number-of-arguments
-if [ "$#" -ne 1 ]; then
-  echo "[E] usage: $0 <start|stop>" >&2
-  exit 1
-fi
-
-check_preconditions
-case "$1" in
-    up|start)
-        CMD="python ${CURRENT_DIR}/rtu_slave.py &"
-        run_cmd_save_pid "$CMD" $RTU_SLAVE_PID
-        ;;
-    down|stop)
-        kill_pid $RTU_SLAVE_PID
-        ;;
-esac

tests/run_itests.py

@@ -3,6 +3,9 @@
 import random
 import unittest
 import sys
+import logging
+from subprocess import Popen
+from os.path import isfile
 
 from pymodbus.client.sync import ModbusTcpClient
 from pymodbus.pdu import ExceptionResponse
@@ -11,31 +14,41 @@ from pymodbus.bit_write_message import WriteMultipleCoilsResponse, WriteSingleCo
 from pymodbus.register_read_message import ReadInputRegistersResponse, ReadHoldingRegistersResponse
 from pymodbus.register_write_message import WriteMultipleRegistersResponse, WriteSingleRegisterResponse
 
-from environment.rtu_slave import ModbusSerialServer
-
-MBUSD_PORT = 1025
-
+MBUSD_PORT   = 1025
+MBUSD_BINARY = "../output.dir/mbusd"
 
 class TestModbusRequests(unittest.TestCase):
+    log = logging.getLogger("TestModbusRequests")
 
     @classmethod
     def setUpClass(cls):
-        cls.log = logging.getLogger("TestModbusRequests")
+        cls.log.debug("1. run socat")
+        cls.socat = Popen(["socat", "-d", "-d", "pty,raw,echo=0,link=/tmp/pts0", "pty,raw,echo=0,link=/tmp/pts1"])
 
+        cls.log.debug("2. run rtu_slave")
+        from environment.rtu_slave import ModbusSerialServer
         cls.mbs = ModbusSerialServer()
         cls.mbs.start()
 
+        cls.log.debug("3. run mbusd to be tested with the binary:%s" % MBUSD_BINARY)
+        cls.mbusd_main = Popen([MBUSD_BINARY, "-d", "-L", "-v9", "-p/tmp/pts0", "-s19200", "-P" + str(MBUSD_PORT)])
+
+        cls.log.debug("4. connect the modbus TCP client to mbusd")
         cls.client = ModbusTcpClient('127.0.0.1', port=MBUSD_PORT)
         cls.client.connect()
 
     @classmethod
     def tearDownClass(cls):
         cls.log.info("test teardown")
+
+        cls.log.debug("4. kill tcp_client")
         cls.client.close()
-        try:
-            cls.mbs.kill()
-        except e:
-            cls.log.info("Fetched exception during mbs.kill")
+        cls.log.debug("3. kill mbusd")
+        cls.mbusd_main.kill()
+        cls.log.debug("2. kill rtu_slave")
+        cls.mbs.kill()
+        cls.log.debug("1. kill socat")
+        cls.socat.kill()
 
 
     def test_coils(self):
@@ -104,12 +117,15 @@ class TestModbusRequests(unittest.TestCase):
         self.assertEqual(result.original_code, 5, result) # fc05 Write Single Coil
         self.assertEqual(result.exception_code, 2, result) # Illegal Data Address
 
-
 if __name__ == '__main__':
-    import logging
     stdout_handler = logging.StreamHandler(sys.stdout)
     logging.basicConfig(level=logging.DEBUG,
                         format=u'[%(asctime)s] %(name)-26s-%(levelname)-5s %(funcName)-20s:%(lineno)-4d \033[35m%(message)s\033[0m',
                         datefmt='%d.%m. %H:%M:%S',
                         handlers=[stdout_handler])
-    unittest.main(verbosity=2)
+    if len(sys.argv) != 2 or not isfile(sys.argv[1]):
+        logging.error("usage: ./run_itests.py <mbusd_binary_path>")
+        sys.exit(1)
+    MBUSD_BINARY = sys.argv[1]
+
+    unittest.main(verbosity=2, argv=[sys.argv[0]])

tests/run_itests.sh

@@ -8,24 +8,6 @@ if ! [ -x "$1" ]; then
 fi
 
 export MBUSD_BIN=$1
-
-function setup() {
-    echo "[I] do test environment setup"
-    $CWD/environment/socat_runner.sh start || return 1
-    # $CWD/environment/rtu_slave_runner.sh start || return 1
-    $CWD/environment/mbusd_runner.sh start || return 1
-}
-
-function teardown() {
-    echo "[I] do test environment teardown"
-    $CWD/environment/mbusd_runner.sh stop
-    # $CWD/environment/rtu_slave_runner.sh stop
-    $CWD/environment/socat_runner.sh stop
-}
-trap teardown EXIT
-
-setup || (echo "failed to setup" && exit 1)
-
-$CWD/run_itests.py || exit 1
+$CWD/run_itests.py "$MBUSD_BIN" || exit 1
 
 exit 0