fix logic and add doc for region

Author: Dan Choi

tests/integ/__init__.py

@@ -29,6 +29,7 @@
 HOSTING_NO_P3_REGIONS = ['ap-southeast-1', 'ap-southeast-2', 'ap-south-1', 'ca-central-1',
                          'eu-west-2', 'us-west-1']
 # EI is currently only supported in the following regions
+# regions were derived from https://aws.amazon.com/machine-learning/elastic-inference/pricing/
 EI_SUPPORTED_REGIONS = ['us-east-1', 'us-east-2', 'us-west-2', 'eu-west-1', 'ap-northeast-1', 'ap-northeast-2']
 
 logging.getLogger('boto3').setLevel(logging.INFO)

tests/integ/test_mxnet_train.py

@@ -74,7 +74,7 @@ def test_deploy_model(mxnet_training_job, sagemaker_session):
 
 @pytest.continous_testing
 @pytest.regional_testing
-@pytest.mark.skipif(tests.integ.test_region() in tests.integ.EI_SUPPORTED_REGIONS,
+@pytest.mark.skipif(tests.integ.test_region() not in tests.integ.EI_SUPPORTED_REGIONS,
                     reason="EI isn't supported in that specific region.")
 def test_deploy_model_with_accelerator(mxnet_training_job, sagemaker_session, ei_mxnet_version):
     endpoint_name = 'test-mxnet-deploy-model-ei-{}'.format(sagemaker_timestamp())

tests/integ/test_tf.py

@@ -79,7 +79,7 @@ def test_deploy_model(sagemaker_session, tf_training_job):
 
 @pytest.continous_testing
 @pytest.regional_testing
-@pytest.mark.skipif(tests.integ.test_region() in tests.integ.EI_SUPPORTED_REGIONS,
+@pytest.mark.skipif(tests.integ.test_region() not in tests.integ.EI_SUPPORTED_REGIONS,
                     reason="EI isn't supported in that specific region.")
 @pytest.mark.skipif(PYTHON_VERSION != 'py2', reason="TensorFlow image supports only python 2.")
 def test_deploy_model_with_accelerator(sagemaker_session, tf_training_job, ei_tf_version):