feature: support local simulators for jobs

src/braket/aws/aws_quantum_job.py

@@ -84,8 +84,11 @@ def create(
         """Creates a job by invoking the Braket CreateJob API.
 
         Args:
-            device (str): ARN for the AWS device which is primarily
-                accessed for the execution of this job.
+            device (str): ARN for the AWS device which is primarily accessed for the execution
+                of this job. Alternatively, a string of the format
+                "local:<provider>.<simulator>.<name>" for using a local simulator for the job.
+                This string will be available as the environment variable `AMZN_BRAKET_DEVICE_ARN`
+                inside the job container when using a Braket container.
 
             source_module (str): Path (absolute, relative or an S3 URI) to a python module to be
                 tarred and uploaded. If `source_module` is an S3 URI, it must point to a
@@ -531,6 +534,8 @@ def __hash__(self) -> int:
     @staticmethod
     def _initialize_session(session_value, device, logger):
         aws_session = session_value or AwsSession()
+        if device.startswith("local:"):
+            return aws_session
         device_region = device.split(":")[3]
         return (
             AwsQuantumJob._initialize_regional_device_session(aws_session, device, logger)

test/unit_tests/braket/aws/test_aws_quantum_job.py

@@ -15,6 +15,7 @@
 import json
 import logging
 import os
+import re
 import tarfile
 import tempfile
 from unittest.mock import Mock, patch
@@ -184,10 +185,11 @@ def test_quantum_job_constructor_default_session(
     assert job._aws_session == aws_session_mock.return_value
 
 
-@pytest.mark.xfail(raises=ValueError)
 def test_quantum_job_constructor_invalid_region(aws_session):
+    region_mismatch = "The aws session region does not match the region for the supplied arn."
     arn = "arn:aws:braket:unknown-region:875981177017:job/quantum_job_name"
-    AwsQuantumJob(arn, aws_session)
+    with pytest.raises(ValueError, match=region_mismatch):
+        AwsQuantumJob(arn, aws_session)
 
 
 @patch("braket.aws.aws_quantum_job.boto3.Session")
@@ -528,9 +530,9 @@ def test_name(quantum_job_arn, quantum_job_name, aws_session):
     assert quantum_job.name == quantum_job_name
 
 
-@pytest.mark.xfail(raises=AttributeError)
 def test_no_arn_setter(quantum_job):
-    quantum_job.arn = 123
+    with pytest.raises(AttributeError, match="can't set attribute"):
+        quantum_job.arn = 123
 
 
 @pytest.mark.parametrize("wait_until_complete", [True, False])
@@ -577,16 +579,20 @@ def test_cancel_job(quantum_job_arn, aws_session, generate_cancel_job_response):
     assert status == cancellation_status
 
 
-@pytest.mark.xfail(raises=ClientError)
 def test_cancel_job_surfaces_exception(quantum_job, aws_session):
     exception_response = {
         "Error": {
             "Code": "ValidationException",
             "Message": "unit-test-error",
         }
     }
+    error_string = re.escape(
+        "An error occurred (ValidationException) when calling the "
+        "cancel_job operation: unit-test-error"
+    )
     aws_session.cancel_job.side_effect = ClientError(exception_response, "cancel_job")
-    quantum_job.cancel()
+    with pytest.raises(ClientError, match=error_string):
+        quantum_job.cancel()
 
 
 @pytest.mark.parametrize(
@@ -985,3 +991,13 @@ def test_exceptions_in_all_device_regions(aws_session):
     )
     with pytest.raises(ClientError, match=error_message):
         AwsQuantumJob._initialize_session(aws_session, device_arn, logger)
+
+
+@patch("braket.aws.aws_quantum_job.AwsSession")
+def test_initialize_session_local_device(mock_new_session, aws_session):
+    logger = logging.getLogger(__name__)
+    device = "local:provider.device.name"
+    # don't change a provided AwsSession
+    assert AwsQuantumJob._initialize_session(aws_session, device, logger) == aws_session
+    # otherwise, create an AwsSession with the profile defaults
+    assert AwsQuantumJob._initialize_session(None, device, logger) == mock_new_session()