SERVER-34116 Switch to use NoOpFixture for fixture.NOOP_FIXTURE_CLASS.

The Fixture class raises a NotImplementedError exception for its
get_driver_connection_url() method, so it can no longer be used as a
no-op fixture.

These changes were taken from a2f6a2294feb20a9a3a11dcdbfbfed05f4756c1b2.

2 files changed, 15 insertions, 2 deletions

diff --git a/buildscripts/resmokelib/testing/fixtures/__init__.py b/buildscripts/resmokelib/testing/fixtures/__init__.py
index d68a66911d2..f4589f20615 100644
--- a/buildscripts/resmokelib/testing/fixtures/__init__.py
+++ b/buildscripts/resmokelib/testing/fixtures/__init__.py
@@ -4,7 +4,7 @@ Fixtures for executing JSTests against.
 
 from __future__ import absolute_import
 
-from .interface import Fixture, ReplFixture
+from .interface import NoOpFixture, ReplFixture
 from .standalone import MongoDFixture
 from .replicaset import ReplicaSetFixture
 from .masterslave import MasterSlaveFixture
@@ -14,7 +14,7 @@ from .shardedcluster import ShardedClusterFixture
 NOOP_FIXTURE_CLASS = "Fixture"
 
 _FIXTURES = {
-    "Fixture": Fixture,
+    "Fixture": NoOpFixture,
     "MongoDFixture": MongoDFixture,
     "ReplicaSetFixture": ReplicaSetFixture,
     "MasterSlaveFixture": MasterSlaveFixture,
diff --git a/buildscripts/resmokelib/testing/fixtures/interface.py b/buildscripts/resmokelib/testing/fixtures/interface.py
index 83418502ead..f2cb1b9c8b8 100644
--- a/buildscripts/resmokelib/testing/fixtures/interface.py
+++ b/buildscripts/resmokelib/testing/fixtures/interface.py
@@ -147,3 +147,16 @@ class ReplFixture(Fixture):
                 if remaining <= 0.0:
                     raise errors.ServerFailure("Failed to connect to the primary on port %d" %
                                                self.port)
+
+class NoOpFixture(Fixture):
+    """A Fixture implementation that does not start any servers.
+
+    Used when the MongoDB deployment is started by the JavaScript test itself with MongoRunner,
+    ReplSetTest, or ShardingTest.
+    """
+
+    def get_internal_connection_string(self):
+        return None
+
+    def get_driver_connection_url(self):
+        return None