Stop pytest from picking up non-test classes

Some classes are not meant to be picked up,
but pytest does it and throw warning message when something goes wrong.
One example of this issue:
PytestCollectionWarning: cannot collect test class 'TestCluster' because it has a __new__ constructor (from: tests/integration/standard/column_encryption/test_policies.py)
    class TestCluster(object):

Author: dkropachev

tests/integration/__init__.py

@@ -1060,6 +1060,8 @@ def assert_startswith(s, prefix):
 
 
 class TestCluster(object):
+    __test__ = False
+
     DEFAULT_PROTOCOL_VERSION = default_protocol_version
     DEFAULT_CASSANDRA_IP = CASSANDRA_IP
     DEFAULT_ALLOW_BETA = ALLOW_BETA_PROTOCOL

tests/integration/cqlengine/advanced/test_cont_paging.py

@@ -28,6 +28,8 @@
 
 
 class TestMultiKeyModel(models.Model):
+    __test__ = False
+
     partition = columns.Integer(primary_key=True)
     cluster = columns.Integer(primary_key=True)
     count = columns.Integer(required=False)

tests/integration/cqlengine/base.py

@@ -22,6 +22,7 @@
 from uuid import uuid4
 
 class TestQueryUpdateModel(Model):
+    __test__ = False
 
     partition = columns.UUID(primary_key=True, default=uuid4)
     cluster = columns.Integer(primary_key=True)

tests/integration/cqlengine/columns/test_container_columns.py

@@ -35,6 +35,8 @@
 
 
 class TestSetModel(Model):
+    __test__ = False
+
     partition = columns.UUID(primary_key=True, default=uuid4)
     int_set = columns.Set(columns.Integer, required=False)
     text_set = columns.Set(columns.Text, required=False)
@@ -193,6 +195,7 @@ def test_default_empty_container_saving(self):
 
 
 class TestListModel(Model):
+    __test__ = False
 
     partition = columns.UUID(primary_key=True, default=uuid4)
     int_list = columns.List(columns.Integer, required=False)
@@ -347,6 +350,8 @@ def test_blind_list_updates_from_none(self):
 
 
 class TestMapModel(Model):
+    __test__ = False
+
     partition = columns.UUID(primary_key=True, default=uuid4)
     int_map = columns.Map(columns.Integer, columns.UUID, required=False)
     text_map = columns.Map(columns.Text, columns.DateTime, required=False)
@@ -525,6 +530,7 @@ def test_default_empty_container_saving(self):
 
 
 class TestCamelMapModel(Model):
+    __test__ = False
 
     partition = columns.UUID(primary_key=True, default=uuid4)
     camelMap = columns.Map(columns.Text, columns.Integer, required=False)
@@ -546,6 +552,7 @@ def test_camelcase_column(self):
 
 
 class TestTupleModel(Model):
+    __test__ = False
 
     partition = columns.UUID(primary_key=True, default=uuid4)
     int_tuple = columns.Tuple(columns.Integer, columns.Integer, columns.Integer, required=False)
@@ -746,6 +753,7 @@ def test_blind_tuple_updates_from_none(self):
 
 
 class TestNestedModel(Model):
+    __test__ = False
 
     partition = columns.UUID(primary_key=True, default=uuid4)
     list_list = columns.List(columns.List(columns.Integer), required=False)

tests/integration/cqlengine/columns/test_counter_column.py

@@ -21,6 +21,7 @@
 
 
 class TestCounterModel(Model):
+    __test__ = False
 
     partition = columns.UUID(primary_key=True, default=uuid4)
     cluster = columns.UUID(primary_key=True, default=uuid4)

tests/integration/cqlengine/columns/test_static_column.py

@@ -28,6 +28,8 @@
 STATIC_SUPPORTED = PROTOCOL_VERSION >= 2
 
 class TestStaticModel(Model):
+    __test__ = False
+
     partition = columns.UUID(primary_key=True, default=uuid4)
     cluster = columns.UUID(primary_key=True, default=uuid4)
     static = columns.Text(static=True)

tests/integration/cqlengine/connections/test_connection.py

@@ -29,6 +29,7 @@
 
 
 class TestConnectModel(Model):
+    __test__ = False
 
     id = columns.Integer(primary_key=True)
     keyspace = columns.Text()

tests/integration/cqlengine/management/test_management.py

@@ -372,6 +372,8 @@ def test_sync_warnings(self):
 
 
 class TestIndexSetModel(Model):
+    __test__ = False
+
     partition = columns.UUID(primary_key=True)
     int_set = columns.Set(columns.Integer, index=True)
     int_list = columns.List(columns.Integer, index=True)

tests/integration/cqlengine/model/test_equality_operations.py

@@ -21,6 +21,7 @@
 from cassandra.cqlengine import columns
 
 class TestModel(Model):
+    __test__ = False
 
     id      = columns.UUID(primary_key=True, default=lambda:uuid4())
     count   = columns.Integer()

tests/integration/cqlengine/model/test_model_io.py

@@ -36,6 +36,7 @@
 
 
 class TestModel(Model):
+    __test__ = False
 
     id = columns.UUID(primary_key=True, default=lambda: uuid4())
     count = columns.Integer()
@@ -44,6 +45,8 @@ class TestModel(Model):
 
 
 class TestModelSave(Model):
+    __test__ = False
+
     partition = columns.UUID(primary_key=True, default=uuid4)
     cluster = columns.Integer(primary_key=True)
     count = columns.Integer(required=False)
@@ -302,6 +305,7 @@ class FloatingPointModel(Model):
 
 
 class TestMultiKeyModel(Model):
+    __test__ = False
 
     partition = columns.Integer(primary_key=True)
     cluster = columns.Integer(primary_key=True)
@@ -658,6 +662,7 @@ def test_reserved_cql_words_can_be_used_as_column_names(self):
 
 
 class TestQueryModel(Model):
+    __test__ = False
 
     test_id = columns.UUID(primary_key=True, default=uuid4)
     date = columns.Date(primary_key=True)