def test_correct_input_successfully_uploads_blob(self):
"""
NOTE: the test below relies on a *reasonably* good Internet connection to
upload the test image. If the connection isn't good enough, the connection
will time out, the test will fail and None will be returned.
"""
sftabs = create_and_store_pptx.SaveFileToAzureBlobStorage(connect_str=self.conn_str,
container_name= self.container_name)
# create the container
container = sftabs.create_container()
# read the binary contents of the test file, and convert to file-like object
# using BytesIO
with open(self.file_path, "rb") as f:
img_bytes = f.read()
bytes_out = BytesIO(img_bytes)
# try to upload the file
if container is not None:
url = sftabs.upload_bytes_to_container(self.file, bytes_out.getvalue())
else:
self.fail("The container was not created correctly.")
self.assertIsNotNone(url)
# check that the file appears in the container
blobs_in_container = [blob.name for blob in container.list_blobs()]
self.assertIn(self.file, blobs_in_container)
def test_unique_container_name_works_correctly(self):
"""
Check that when we attempt to create a container with a unique name:
- The container is indeed created;
- create_container() returns a ContainerClient object;
- The object allows public access to blobs only.
"""
# generate a unique container name
container_name = get_container_name()
# create a new (temporary) container
sftabs = create_and_store_pptx.SaveFileToAzureBlobStorage(connect_str=self.conn_str,
container_name=container_name)
container = sftabs.create_container()
# check that 'container' is a ContainerClient object
self.assertIsInstance(container, ContainerClient)
# create a BlobServiceClient for next checks
try:
blob_service_client = BlobServiceClient.from_connection_string(self.conn_str)
except Exception as err:
self.fail(f"The BlobServiceClient was not created successfully. Sys error: {err}")
# get all containers whose name starts with "test-", and check our container is there
test_containers = blob_service_client.list_containers(name_starts_with='test-',
include_metadata=True)
test_container_names = [c["name"] for c in test_containers]
self.assertIn(container_name, test_container_names)
# check that the container has public access permissions for 'blob' only
# (i.e. not for the container itself)
props = container.get_container_properties()
self.assertEqual(props["public_access"], "blob")
def test_connect_str_is_none_returns_none(self):
"""
Check that if the connection string used is None, then None is returned.
NOTE: this case activates the AttributeError exception
"""
sftabs = create_and_store_pptx.SaveFileToAzureBlobStorage(connect_str=None,
container_name=self.container_name)
result = sftabs.create_blob_service_client()
self.assertIsNone(result)
def test_invalid_connect_str_returns_none(self):
# generate a unique container name
container_name = get_container_name()
# create a new object with invalid connection string
sftabs = create_and_store_pptx.SaveFileToAzureBlobStorage(connect_str="invalid-conn-str",
container_name=container_name)
# create a blob client object
blob_client = sftabs.create_blob_client("test.txt")
self.assertIsNone(blob_client)
def test_non_unique_container_name_returns_none(self):
"""
Check that when we attempt to create a container with a name that already
exists in the same blob storage account, None is returned
"""
# generate a unique container name
container_name = get_container_name()
# create a new (temporary) container
sftabs = create_and_store_pptx.SaveFileToAzureBlobStorage(connect_str=self.conn_str,
container_name=container_name)
container = sftabs.create_container()
# check that 'container' is a ContainerClient object
self.assertIsInstance(container, ContainerClient)
# create another container with the same name
sftabs2 = create_and_store_pptx.SaveFileToAzureBlobStorage(connect_str=self.conn_str,
container_name=container_name)
container2 = sftabs2.create_container()
# check that container2 is None
self.assertIsNone(container2)
def test_correct_input_successfully_creates_blob_client(self):
# generate a unique container name
container_name = get_container_name()
# create a new object and container
sftabs = create_and_store_pptx.SaveFileToAzureBlobStorage(connect_str=self.conn_str,
container_name=container_name)
# container = sftabs.create_container()
sftabs.create_container()
# create a blob client object and check that it is a valid BlobClient
# object
blob_client = sftabs.create_blob_client("test.txt")
self.assertIsInstance(blob_client, BlobClient)
def test_invalid_connection_str_returns_none(self):
"""
Check that using an invalid connection string to create the container returns
None.
"""
# generate a unique container name
container_name = get_container_name()
# create a new (temporary) container
sftabs = create_and_store_pptx.SaveFileToAzureBlobStorage(connect_str="invalid-conn-str",
container_name=container_name)
container = sftabs.create_container()
# check that 'container' is None
self.assertIsNone(container)
def test_filename_set_correctly(self):
"""
Ensure that the filename provided is used for the blob
"""
sftabs = create_and_store_pptx.SaveFileToAzureBlobStorage(connect_str=self.conn_str,
container_name= self.container_name)
# create the container
container = sftabs.create_container()
# read the binary contents of the test file, and convert to file-like object
# using BytesIO
with open(self.file_path, "rb") as f:
img_bytes = f.read()
bytes_out = BytesIO(img_bytes)
tmp_filename = "fake_file"
# try to upload the file
if container is not None:
# url = sftabs.upload_bytes_to_container(tmp_filename, bytes_out.getvalue())
sftabs.upload_bytes_to_container(tmp_filename, bytes_out.getvalue())
else:
self.fail("The container was not created correctly.")
# check that the file appears in the container
blobs_in_container = [blob.name for blob in container.list_blobs()]
self.assertIn(tmp_filename, blobs_in_container)
# ------------------------------------
# class TestCreateContainerAndUploadFile(unittest.TestCase):
# def setUp(self):
# self.conn_str = os.getenv('SNIP_BLOB_STORAGE_CONN_STR')
# # generate a unique container name
# self.container_name = get_container_name()
# # set the test file to be a very small (1KB) file
# self.file = "test_file.txt"
# self.file_path = get_file_path(self.file)
# def tearDown(self):
# delete_tc = delete_test_containers()
# if not delete_tc:
# print(f"*** ERROR: The BlobServiceClient was not created successfully. Sys error: {err} ***")
# del(self.conn_str, self.container_name)
def test_invalid_container_name_returns_none(self):
"""
Container naming in Azure Blob Storage is quite constrained; only alphanumeric
chars and '-' are allowed, and only lower-case alpha (full rules:
https://docs.microsoft.com/en-us/rest/api/storageservices/naming-and-referencing-containers--blobs--and-metadata#container-names)
Check that if an invalid name is provided, None is returned.
"""
# generate an invalid container name
container_name = "invalid_container_name"
# create a new (temporary) container
sftabs = create_and_store_pptx.SaveFileToAzureBlobStorage(connect_str=self.conn_str,
container_name=container_name)
container = sftabs.create_container()
# check that 'container' is None
self.assertIsNone(container)
def test_nonexistent_container_and_blob_does_not_raise_error(self):
"""
This is more of a gotcha than desired behaviour, and is mainly to confirm
that what I think happens, actually *does* happen (i.e. that trying to
create a blob client using a container name for a container that doesn't
exist, and a file that doesn't exist, doesn't raise an exception).
"""
# generate a unique container name
container_name = get_container_name()
# create a new object, but *DO NOT* create a new container
sftabs = create_and_store_pptx.SaveFileToAzureBlobStorage(connect_str=self.conn_str,
container_name=container_name)
# create a blob client object and check that it is a valid BlobClient
# object, even though the container and file don't exist
# [NOTE: there's no fixtures file called 'test.txt']
blob_client = sftabs.create_blob_client("test.txt")
self.assertIsInstance(blob_client, BlobClient)
def test_invalid_file_returns_none(self):
sftabs = create_and_store_pptx.SaveFileToAzureBlobStorage(connect_str=self.conn_str,
container_name= self.container_name)
# create the container
container = sftabs.create_container()
# read the binary contents of the test file, and convert to file-like object
# using BytesIO
with open(self.file_path, "rb") as f:
img_bytes = f.read()
bytes_out = BytesIO(img_bytes)
# try to upload the file, slicing the last byte off the end to invalidate it
if container is not None:
url = sftabs.upload_bytes_to_container(self.file, bytes_out.getvalue()[-1])
else:
self.fail("The container was not created correctly.")
self.assertIsNone(url)
# check that the file does not appear in the container
blobs_in_container = [blob.name for blob in container.list_blobs()]
self.assertNotIn(self.file, blobs_in_container)
def test_connect_str_is_empty_returns_none(self):
sftabs = create_and_store_pptx.SaveFileToAzureBlobStorage(connect_str="",
container_name=self.container_name)
result = sftabs.create_blob_service_client()
self.assertIsNone(result)
def test_valid_connect_str_returns_blobserviceclient_obj(self):
sftabs = create_and_store_pptx.SaveFileToAzureBlobStorage(connect_str=self.conn_str,
container_name=self.container_name)
result = sftabs.create_blob_service_client()
self.assertIsInstance(result, BlobServiceClient)
