Merge "Use a fake coverage module instead of real one."

nova/api/openstack/compute/contrib/coverage_ext.py

@@ -45,7 +45,6 @@ class CoverageController(object):
     """The Coverage report API controller for the OpenStack API."""
     def __init__(self):
         self.data_path = tempfile.mkdtemp(prefix='nova-coverage_')
-        data_out = os.path.join(self.data_path, '.nova-coverage')
         self.compute_api = compute_api.API()
         self.network_api = network_api.API()
         self.conductor_api = conductor_api.API()
@@ -55,14 +54,20 @@ class CoverageController(object):
         self.cert_api = cert_api.CertAPI()
         self.services = []
         self.combine = False
-        try:
-            import coverage
-            self.coverInst = coverage.coverage(data_file=data_out)
-            self.has_coverage = True
-        except ImportError:
-            self.has_coverage = False
+        self._cover_inst = None
         super(CoverageController, self).__init__()
 
+    @property
+    def coverInst(self):
+        if not self._cover_inst:
+            try:
+                import coverage
+                data_out = os.path.join(self.data_path, '.nova-coverage')
+                self._cover_inst = coverage.coverage(data_file=data_out)
+            except ImportError:
+                pass
+        return self._cover_inst
+
     def _find_services(self, req):
         """Returns a list of services."""
         context = req.environ['nova.context']
@@ -242,7 +247,7 @@ class CoverageController(object):
                 'report': self._report_coverage,
         }
         authorize(req.environ['nova.context'])
-        if not self.has_coverage:
+        if not self.coverInst:
             msg = _("Python coverage module is not installed.")
             raise exc.HTTPServiceUnavailable(explanation=msg)
         for action, data in body.iteritems():

nova/tests/api/openstack/compute/contrib/test_coverage_ext.py

@@ -34,12 +34,27 @@ def fake_check_coverage(self):
     return False
 
 
-def fake_xml_report(self, outfile):
-    return
+class FakeCoverage(object):
+    def __init__(self, data_file=None):
+        self.started = False
+        return super(FakeCoverage, self).__init__()
 
+    def save(self):
+        pass
 
-def fake_report(self, file):
-    return
+    def start(self):
+        self.started = True
+
+    def stop(self):
+        if not self.started:
+            raise AssertionError
+        self.started = False
+
+    def report(self, file):
+        pass
+
+    def xml_report(self, outfile):
+        pass
 
 
 class CoverageExtensionTest(test.TestCase):
@@ -48,8 +63,7 @@ class CoverageExtensionTest(test.TestCase):
         super(CoverageExtensionTest, self).setUp()
         self.stubs.Set(telnetlib.Telnet, 'write', fake_telnet)
         self.stubs.Set(telnetlib.Telnet, 'expect', fake_telnet)
-        self.stubs.Set(coverage.coverage, 'report', fake_report)
-        self.stubs.Set(coverage.coverage, 'xml_report', fake_xml_report)
+        self.stubs.Set(coverage, 'coverage', FakeCoverage)
         self.admin_context = context.RequestContext('fakeadmin_0',
                                                     'fake',
                                                      is_admin=True)

nova/tests/integrated/test_api_samples.py

@@ -46,6 +46,7 @@ import nova.quota
 from nova.scheduler import driver
 from nova.servicegroup import api as service_group_api
 from nova import test
+from nova.tests.api.openstack.compute.contrib import test_coverage_ext
 from nova.tests.api.openstack.compute.contrib import test_fping
 from nova.tests.api.openstack.compute.contrib import test_networks
 from nova.tests.api.openstack.compute.contrib import test_services
@@ -760,7 +761,7 @@ class CoverageExtJsonTests(ApiSampleTestBase):
 
         self.stubs.Set(coverage_ext.CoverageController, '_check_coverage',
                        _fake_check_coverage)
-        self.stubs.Set(coverage.coverage, 'xml_report', _fake_xml_report)
+        self.stubs.Set(coverage, 'coverage', test_coverage_ext.FakeCoverage)
 
     def test_start_coverage(self):
         # Start coverage data collection.

run_tests.sh

@@ -127,10 +127,6 @@ function run_tests {
   fi
 
   if [ $coverage -eq 1 ]; then
-    # Do not test test_coverage_ext when gathering coverage.
-    if [ "x$testrargs" = "x" ]; then
-      testrargs="^(?!.*test.*coverage).*$"
-    fi
     TESTRTESTS="$TESTRTESTS --coverage"
   else
     TESTRTESTS="$TESTRTESTS --slowest"