Make tests run with either nosetests or pytest

And remove explicit dependencies on nose, replacing with pytest.
The former is the way forward, for it is a better maintained test
library, and a transitive dependency of `molecule`, the test framework
we're using to add integration tests to this repo (work in progress).

roles/openshift_master_facts/test/openshift_master_facts_bad_input_tests.py

@@ -3,7 +3,7 @@ import os
 import sys
 
 from ansible.errors import AnsibleError
-from nose.tools import raises
+import pytest
 
 sys.path.insert(1, os.path.join(os.path.dirname(__file__), os.pardir, "lookup_plugins"))
 
@@ -11,48 +11,47 @@ from openshift_master_facts_default_predicates import LookupModule  # noqa: E402
 
 
 class TestOpenShiftMasterFactsBadInput(object):
-    def setUp(self):
-        self.lookup = LookupModule()
-        self.default_facts = {
-            'openshift': {
-                'common': {}
-            }
+    lookup = LookupModule()
+    default_facts = {
+        'openshift': {
+            'common': {}
         }
+    }
 
-    @raises(AnsibleError)
     def test_missing_openshift_facts(self):
-        facts = {}
-        self.lookup.run(None, variables=facts)
+        with pytest.raises(AnsibleError):
+            facts = {}
+            self.lookup.run(None, variables=facts)
 
-    @raises(AnsibleError)
     def test_missing_deployment_type(self):
-        facts = copy.deepcopy(self.default_facts)
-        facts['openshift']['common']['short_version'] = '10.10'
-        self.lookup.run(None, variables=facts)
+        with pytest.raises(AnsibleError):
+            facts = copy.deepcopy(self.default_facts)
+            facts['openshift']['common']['short_version'] = '10.10'
+            self.lookup.run(None, variables=facts)
 
-    @raises(AnsibleError)
     def test_missing_short_version_and_missing_openshift_release(self):
-        facts = copy.deepcopy(self.default_facts)
-        facts['openshift']['common']['deployment_type'] = 'origin'
-        self.lookup.run(None, variables=facts)
+        with pytest.raises(AnsibleError):
+            facts = copy.deepcopy(self.default_facts)
+            facts['openshift']['common']['deployment_type'] = 'origin'
+            self.lookup.run(None, variables=facts)
 
-    @raises(AnsibleError)
     def test_unknown_deployment_types(self):
-        facts = copy.deepcopy(self.default_facts)
-        facts['openshift']['common']['short_version'] = '1.1'
-        facts['openshift']['common']['deployment_type'] = 'bogus'
-        self.lookup.run(None, variables=facts)
+        with pytest.raises(AnsibleError):
+            facts = copy.deepcopy(self.default_facts)
+            facts['openshift']['common']['short_version'] = '1.1'
+            facts['openshift']['common']['deployment_type'] = 'bogus'
+            self.lookup.run(None, variables=facts)
 
-    @raises(AnsibleError)
     def test_unknown_origin_version(self):
-        facts = copy.deepcopy(self.default_facts)
-        facts['openshift']['common']['short_version'] = '0.1'
-        facts['openshift']['common']['deployment_type'] = 'origin'
-        self.lookup.run(None, variables=facts)
+        with pytest.raises(AnsibleError):
+            facts = copy.deepcopy(self.default_facts)
+            facts['openshift']['common']['short_version'] = '0.1'
+            facts['openshift']['common']['deployment_type'] = 'origin'
+            self.lookup.run(None, variables=facts)
 
-    @raises(AnsibleError)
     def test_unknown_ocp_version(self):
-        facts = copy.deepcopy(self.default_facts)
-        facts['openshift']['common']['short_version'] = '0.1'
-        facts['openshift']['common']['deployment_type'] = 'openshift-enterprise'
-        self.lookup.run(None, variables=facts)
+        with pytest.raises(AnsibleError):
+            facts = copy.deepcopy(self.default_facts)
+            facts['openshift']['common']['short_version'] = '0.1'
+            facts['openshift']['common']['deployment_type'] = 'openshift-enterprise'
+            self.lookup.run(None, variables=facts)

roles/openshift_master_facts/test/openshift_master_facts_default_predicates_tests.py

@@ -86,13 +86,12 @@ TEST_VARS = [
 
 
 class TestOpenShiftMasterFactsDefaultPredicates(object):
-    def setUp(self):
-        self.lookup = LookupModule()
-        self.default_facts = {
-            'openshift': {
-                'common': {}
-            }
+    lookup = LookupModule()
+    default_facts = {
+        'openshift': {
+            'common': {}
         }
+    }
 
     def test_openshift_version(self):
         for regions_enabled in (True, False):

roles/openshift_master_facts/test/openshift_master_facts_default_priorities_tests.py

@@ -74,13 +74,12 @@ TEST_VARS = [
 
 
 class TestOpenShiftMasterFactsDefaultPredicates(object):
-    def setUp(self):
-        self.lookup = LookupModule()
-        self.default_facts = {
-            'openshift': {
-                'common': {}
-            }
+    lookup = LookupModule()
+    default_facts = {
+        'openshift': {
+            'common': {}
         }
+    }
 
     def test_openshift_version(self):
         for zones_enabled in (True, False):

test-requirements.txt

@@ -10,3 +10,4 @@ yamllint
 nose
 coverage
 mock
+pytest