support/testing: move BRTest initialisation to __init__

BRTest's setUp() method contains a few assignments that initialize its
member variables. Since we will want to use these in test case
overrides, move them to the __init__ function.

Also allow the config member to be overridden, rather than always
taking the class member.

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

support/testing/infra/basetest.py

@@ -36,15 +36,18 @@ class BRTest(unittest.TestCase):
     keepbuilds = False
     jlevel = None
 
+    def __init__(self, names):
+        super(BRTest, self).__init__(names)
+        self.testname = self.__class__.__name__
+        self.builddir = os.path.join(self.__class__.outputdir, self.testname)
+        self.emulator = None
+
     def show_msg(self, msg):
         print "{} {:40s} {}".format(datetime.datetime.now().strftime("%H:%M:%S"),
                                     self.testname, msg)
     def setUp(self):
-        self.testname = self.__class__.__name__
-        self.builddir = os.path.join(self.__class__.outputdir, self.testname)
-        self.emulator = None
         self.show_msg("Starting")
-        config = self.__class__.config
+        config = self.config
         if self.jlevel:
             config += "BR2_JLEVEL={}\n".format(self.jlevel)
         self.b = Builder(config, self.builddir, self.logtofile)