Add method to download TOs from Azure

tests/domain/cloud/test_file_uploads.py

@@ -0,0 +1,22 @@
+from atst.domain.csp.file_uploads import AzureUploader
+from azure.storage.blob.models import Blob
+
+
+class MockBlockBlobService(object):
+    def __init__(self, exception=None, **kwargs):
+        self.exception = exception
+
+    def get_blob_to_bytes(self, blob_name="test.pdf", **kwargs):
+        if self.exception:
+            raise self.exception
+        else:
+            return Blob(name=blob_name, content=b"mock content")
+
+
+def test_download_task_order_success(app, monkeypatch):
+    uploader = AzureUploader(config=app.config)
+    uploader.BlockBlobService = MockBlockBlobService
+
+    task_order = uploader.download_task_order("test.pdf")
+    assert task_order["name"] == "test.pdf"
+    assert task_order["content"] == b"mock content"