Replace assertRaisesRegexp with assertRaisesRegex

This replaces the deprecated (in python 3.2) unittest.TestCase method
assertRaisesRegexp() with assertRaisesRegex().

Also add associated hacking check.

Change-Id: I62d5b4c0259c6e2e0fee361542d4b1234ab0ea57
Signed-off-by: Chuck Short <chucks@redhat.com>

masakarimonitors/hacking/checks.py

@@ -50,6 +50,8 @@ log_translation = re.compile(
     r"\(")
 yield_not_followed_by_space = re.compile(r"^\s*yield(?:\(|{|\[|\"|').*$")
 
+assert_raises_regexp = re.compile(r"assertRaisesRegexp\(")
+
 
 @core.flake8ext
 def check_explicit_underscore_import(logical_line, filename):
@@ -100,3 +102,15 @@ def yield_followed_by_space(logical_line):
     if yield_not_followed_by_space.match(logical_line):
         yield (0,
                "M303: Yield keyword should be followed by a space.")
+
+
+@core.flake8ext
+def assert_raisesRegexp(logical_line):
+    """Check that assertRaisesRegexp is not used.
+
+    M304
+    """
+    res = assert_raises_regexp.search(logical_line)
+    if res:
+        yield (0, "M304: assertRaisesRegex must be used instead "
+                  "of assertRaisesRegexp")

masakarimonitors/tests/unit/hostmonitor/host_handler/test_handle_host.py

@@ -680,7 +680,7 @@ class TestHandleHost(testtools.TestCase):
 
         obj = handle_host.HandleHost()
 
-        self.assertRaisesRegexp(
+        self.assertRaisesRegex(
             Exception, "Failed to get nodes tag from crm_mon xml.",
             obj._check_host_status_by_crm_mon)
         mock_get_crmmon_xml.assert_called_once_with()
@@ -777,7 +777,7 @@ class TestHandleHost(testtools.TestCase):
 
         obj = handle_host.HandleHost()
 
-        self.assertRaisesRegexp(
+        self.assertRaisesRegex(
             Exception, "Failed to get node_state tag from cib xml.",
             obj._check_host_status_by_cibadmin)
         mock_get_cib_xml.assert_called_once_with()

tox.ini

@@ -90,6 +90,7 @@ extension =
     M301 = checks:check_explicit_underscore_import
     M302 = checks:no_translate_logs
     M303 = checks:yield_followed_by_space
+    M304 = checks:assert_raisesRegexp
 paths = ./masakarimonitors/hacking
 
 [testenv:lower-constraints]