tests: some more utility function tests + flake8.

tests/call_error_test.py

@@ -1,4 +1,3 @@
-import os
 import pickle
 import sys
 

tests/error_test.py

@@ -1,15 +1,8 @@
 
-import logging
-import subprocess
-import time
-import zlib
-
 import unittest2
 
 import testlib
-import mitogen.master
-import mitogen.parent
-import mitogen.utils
+import mitogen.core
 
 
 class ConstructorTest(testlib.TestCase):

tests/router_test.py

@@ -1,5 +1,3 @@
-import logging
-import subprocess
 import time
 import zlib
 

tests/serialization_test.py

@@ -1,11 +1,4 @@
 
-try:
-    from io import StringIO
-    from io import BytesIO
-except ImportError:
-    from StringIO import StringIO as StringIO
-    from StringIO import StringIO as BytesIO
-
 import pickle
 import unittest2
 

tests/signals_test.py

@@ -0,0 +1,45 @@
+
+import unittest2
+
+import testlib
+import mitogen.core
+
+
+class Thing():
+    pass
+
+
+class ListenFireTest(testlib.TestCase):
+    def test_no_args(self):
+        thing = Thing()
+        latch = mitogen.core.Latch()
+        mitogen.core.listen(thing, 'event',
+            lambda: latch.put('event fired'))
+
+        mitogen.core.fire(thing, 'event')
+        self.assertEquals('event fired', latch.get())
+        self.assertTrue(latch.empty())
+
+    def test_with_args(self):
+        thing = Thing()
+        latch = mitogen.core.Latch()
+        mitogen.core.listen(thing, 'event', latch.put)
+        mitogen.core.fire(thing, 'event', 'event fired')
+        self.assertEquals('event fired', latch.get())
+        self.assertTrue(latch.empty())
+
+    def test_two_listeners(self):
+        thing = Thing()
+        latch = mitogen.core.Latch()
+        latch2 = mitogen.core.Latch()
+        mitogen.core.listen(thing, 'event', latch.put)
+        mitogen.core.listen(thing, 'event', latch2.put)
+        mitogen.core.fire(thing, 'event', 'event fired')
+        self.assertEquals('event fired', latch.get())
+        self.assertEquals('event fired', latch2.get())
+        self.assertTrue(latch.empty())
+        self.assertTrue(latch2.empty())
+
+
+if __name__ == '__main__':
+    unittest2.main()