Update sts endpoint assertions

The default behavior for which STS endpoint to use is changing from global to regional.

These tests assume that the global endpoint will always be used, which is not the case
for the default behavior from the botocore client. This change updates the tests to reflect
that the regional endpoint will be used.

Author: kdaily

tests/functional/eks/test_get_token.py

@@ -140,18 +140,23 @@ def test_output_table(self, mock_datetime):
     def test_url(self):
         cmd = 'eks get-token --cluster-name %s' % self.cluster_name
         response = self.run_get_token(cmd)
-        self.assert_url_correct(response)
+        self.assert_url_correct(
+            response,
+            expected_endpoint='sts.us-east-1.amazonaws.com',
+        )
 
     def test_url_with_region(self):
         cmd = 'eks get-token --cluster-name %s' % self.cluster_name
         cmd += ' --region us-west-2'
         response = self.run_get_token(cmd)
-        # Even though us-west-2 was specified, we should still only be
-        # signing for the global endpoint.
+        # Previously, even though us-west-2 is specified, we still
+        # signed for the global endpoint. Now, the STS client defaults
+        # to using the regional endpoint, so the expected signing region
+        # should be the same as the endpoint region.
         self.assert_url_correct(
             response,
-            expected_endpoint='sts.amazonaws.com',
-            expected_signing_region='us-east-1',
+            expected_endpoint='sts.us-west-2.amazonaws.com',
+            expected_signing_region='us-west-2',
         )
 
     def test_url_with_arn(self):
@@ -173,7 +178,11 @@ def test_url_with_arn(self):
             assume_role_call[1],
             {'RoleArn': self.role_arn, 'RoleSessionName': 'EKSGetTokenAuth'},
         )
-        self.assert_url_correct(response, has_session_token=True)
+        self.assert_url_correct(
+            response, 
+            expected_endpoint='sts.us-east-1.amazonaws.com',
+            has_session_token=True,
+        )
 
     def test_token_has_no_padding(self):
         cmd = 'eks get-token --cluster-name %s' % self.cluster_name