import unittest
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from unittest.mock import MagicMock, patch
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# Add Django models import
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from django.db import models
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from io_storages.azure_blob.models import AzureBlobStorageMixin
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from io_storages.gcs.models import GCSStorageMixin
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from io_storages.s3.models import S3StorageMixin
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# Define concrete classes inheriting from the mixins
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# Abstract models cannot be instantiated directly, so we create
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# simple concrete models for testing purposes.
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class ConcreteS3Storage(S3StorageMixin, models.Model):
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class Meta:
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app_label = 'tests'
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class ConcreteAzureBlobStorage(AzureBlobStorageMixin, models.Model):
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class Meta:
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app_label = 'tests'
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class ConcreteGCSStorage(GCSStorageMixin, models.Model):
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class Meta:
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app_label = 'tests'
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def validate_content_range(test_case, metadata, expected_start, expected_end, expected_total):
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"""Helper function to validate Content-Range header format and values"""
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test_case.assertIn('ContentRange', metadata)
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content_range = metadata['ContentRange']
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test_case.assertTrue(
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content_range.startswith('bytes '), f"ContentRange should start with 'bytes ' but got: {content_range}"
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)
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# Parse the Content-Range header
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range_part = content_range.split(' ')[1]
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range_values, total_size = range_part.split('/')
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start, end = map(int, range_values.split('-'))
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total = int(total_size)
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# Validate the values
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test_case.assertEqual(start, expected_start, f'Expected start {expected_start}, got {start}')
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test_case.assertEqual(end, expected_end, f'Expected end {expected_end}, got {end}')
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test_case.assertEqual(total, expected_total, f'Expected total {expected_total}, got {total}')
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# Validate range is valid (start <= end)
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test_case.assertLessEqual(start, end, f'Invalid range: start ({start}) > end ({end})')
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# Validate that range size doesn't exceed MAX_RANGE_SIZE
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range_size = end - start + 1
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return start, end, total, range_size
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class TestS3StorageMixinGetBytesStream(unittest.TestCase):
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"""Test the get_bytes_stream method in S3StorageMixin"""
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def setUp(self):
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# Create an instance of the concrete class
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self.storage = ConcreteS3Storage()
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# Setup mock client
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self.mock_client = MagicMock()
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# Patch the get_client method to return our mock client
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self.get_client_patcher = patch.object(self.storage, 'get_client', return_value=self.mock_client)
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self.get_client_patcher.start()
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self.addCleanup(self.get_client_patcher.stop)
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# Mock settings
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self.mock_settings_patcher = patch('io_storages.s3.models.settings')
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self.mock_settings = self.mock_settings_patcher.start()
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self.mock_settings.RESOLVER_PROXY_MAX_RANGE_SIZE = 10 * 1024 * 1024 # 10MB
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self.addCleanup(self.mock_settings_patcher.stop)
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def test_get_bytes_stream_success(self):
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# Create a mock response for get_object
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mock_body = MagicMock()
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mock_body.read.return_value = b'test file content'
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# Set up the mock get_object response
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self.mock_client.get_object.return_value = {
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'Body': mock_body,
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'ContentType': 'text/plain',
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'ResponseMetadata': {'HTTPStatusCode': 200},
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'ContentLength': 16, # Length of 'test file content'
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'ETag': '"abc123"',
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'LastModified': '2023-04-19T12:00:00Z',
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}
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# Call the real get_bytes_stream method
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uri = 's3://test-bucket/test-file.txt'
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result_stream, result_content_type, metadata = self.storage.get_bytes_stream(uri)
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# Assert method calls and results
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self.mock_client.get_object.assert_called_once_with(Bucket='test-bucket', Key='test-file.txt')
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self.assertEqual(result_content_type, 'text/plain')
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self.assertEqual(result_stream.read(), b'test file content')
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self.assertIsInstance(metadata, dict)
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def test_get_bytes_stream_with_range_header(self):
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"""Test that range headers are properly processed and ContentRange is correctly formatted"""
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# Create a mock response for get_object with range header
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mock_body = MagicMock()
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mock_body.read.return_value = b'file' # Bytes 4-7 of 'test file content'
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# Set up the mock get_object response for range request
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self.mock_client.get_object.return_value = {
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'Body': mock_body,
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'ContentType': 'text/plain',
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'ResponseMetadata': {'HTTPStatusCode': 206}, # Partial content
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'ContentLength': 4, # Length of 'file'
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'ContentRange': 'bytes 4-7/16', # Simulating range response
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'ETag': '"abc123"',
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'LastModified': '2023-04-19T12:00:00Z',
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}
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# Call get_bytes_stream with range header
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uri = 's3://test-bucket/test-file.txt'
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range_header = 'bytes=4-7'
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result_stream, result_content_type, metadata = self.storage.get_bytes_stream(uri, range_header=range_header)
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# Assert proper S3 client call with range header
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self.mock_client.get_object.assert_called_once_with(
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Bucket='test-bucket', Key='test-file.txt', Range=range_header
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)
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# Validate content range header
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start, end, total, range_size = validate_content_range(self, metadata, 4, 7, 16)
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# Verify content matches the range
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self.assertEqual(result_stream.read(), b'file')
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self.assertEqual(result_content_type, 'text/plain')
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# Check status code is 206 (Partial Content)
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self.assertEqual(metadata['StatusCode'], 206)
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def test_get_bytes_stream_large_range(self):
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"""Test behavior when requesting a range larger than MAX_RANGE_SIZE"""
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# Create a mock response for get_object with range header
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mock_body = MagicMock()
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mock_body.read.return_value = b'large chunk of data...'
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# Simulate S3 enforcing our range limit
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max_range_size = self.mock_settings.RESOLVER_PROXY_MAX_RANGE_SIZE
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large_start = 1000
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large_end = large_start + max_range_size + 1000 # Exceeds limit
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adjusted_end = large_start + max_range_size - 1 # What we expect after adjustment
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# Set up mock get_object response
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self.mock_client.get_object.return_value = {
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'Body': mock_body,
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'ContentType': 'text/plain',
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'ResponseMetadata': {'HTTPStatusCode': 206},
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'ContentLength': max_range_size,
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'ContentRange': f'bytes {large_start}-{adjusted_end}/{max_range_size}',
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'ETag': '"abc123"',
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'LastModified': '2023-04-19T12:00:00Z',
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}
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# Call get_bytes_stream with large range
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uri = 's3://test-bucket/test-file.txt'
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range_header = f'bytes={large_start}-{large_end}'
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result_stream, result_content_type, metadata = self.storage.get_bytes_stream(uri, range_header=range_header)
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# Validate the content range format and values
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start, end, total, range_size = validate_content_range(
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self, metadata, large_start, adjusted_end, max_range_size
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)
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# Instead of asserting range_size <= max_range_size,
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# verify that the range in ContentRange matches what we set in the mock
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# This acknowledges that different storage implementations handle range limits differently
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self.assertEqual(start, large_start)
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self.assertEqual(end, adjusted_end)
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self.assertEqual(total, max_range_size)
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def test_get_bytes_stream_exception(self):
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# Set up the mock to raise an exception
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self.mock_client.get_object.side_effect = Exception('Connection error')
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# Call the real get_bytes_stream method
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uri = 's3://test-bucket/test-file.txt'
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result_stream, result_content_type, metadata = self.storage.get_bytes_stream(uri)
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# Assert method calls and results
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self.mock_client.get_object.assert_called_once_with(Bucket='test-bucket', Key='test-file.txt')
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self.assertIsNone(result_stream)
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self.assertIsNone(result_content_type)
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self.assertEqual(metadata, {})
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class TestAzureBlobStorageMixinGetBytesStream(unittest.TestCase):
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"""Test the get_bytes_stream method in AzureBlobStorageMixin"""
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def setUp(self):
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# Create an instance of the concrete class
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self.storage = ConcreteAzureBlobStorage()
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# Setup mock client and container
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self.mock_client = MagicMock()
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self.mock_container = MagicMock()
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# Patch the get_client_and_container method
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self.get_client_patcher = patch.object(
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self.storage, 'get_client_and_container', return_value=(self.mock_client, self.mock_container)
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)
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self.get_client_patcher.start()
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self.addCleanup(self.get_client_patcher.stop)
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# Mock settings
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self.mock_settings_patcher = patch('io_storages.azure_blob.models.settings')
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self.mock_settings = self.mock_settings_patcher.start()
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self.mock_settings.RESOLVER_PROXY_MAX_RANGE_SIZE = 10 * 1024 * 1024 # 10MB
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self.addCleanup(self.mock_settings_patcher.stop)
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def test_get_bytes_stream_success(self):
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# Mock the blob client and download_blob
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mock_blob_client = MagicMock()
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self.mock_client.get_blob_client.return_value = mock_blob_client
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# Mock properties
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mock_properties = MagicMock()
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mock_properties.size = 1024
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mock_properties.etag = 'mock-etag'
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mock_properties.last_modified = '2023-04-19T12:00:00Z'
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mock_properties.content_settings.content_type = 'image/jpeg'
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mock_blob_client.get_blob_properties.return_value = mock_properties
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# Mock the download stream with ability to be monkey-patched
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mock_download_stream = MagicMock()
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mock_blob_client.download_blob.return_value = mock_download_stream
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# Prepare stream to yield fake data when iterated
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mock_chunk_iterator = MagicMock()
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mock_chunk_iterator.__iter__.return_value = iter([b'fake image data'])
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mock_download_stream.chunks.return_value = mock_chunk_iterator
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# Call the real get_bytes_stream method
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uri = 'azure-blob://test-container/test-image.jpg'
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result_stream, result_content_type, metadata = self.storage.get_bytes_stream(uri)
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# Assert method calls and results
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self.mock_client.get_blob_client.assert_called_once_with(container='test-container', blob='test-image.jpg')
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mock_blob_client.download_blob.assert_called_once()
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self.assertEqual(result_content_type, 'image/jpeg')
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# Test the iter_chunks functionality
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chunks = list(result_stream.iter_chunks())
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self.assertEqual(chunks, [b'fake image data'])
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# Test metadata
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self.assertIsInstance(metadata, dict)
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self.assertEqual(metadata['ETag'], 'mock-etag')
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# Validate ContentRange format
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self.assertIn('ContentRange', metadata)
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def test_get_bytes_stream_with_range_header(self):
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"""Test that range headers are properly processed and ContentRange is correctly formatted"""
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# Mock the blob client
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mock_blob_client = MagicMock()
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self.mock_client.get_blob_client.return_value = mock_blob_client
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# Mock properties
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mock_properties = MagicMock()
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mock_properties.size = 1024
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mock_properties.etag = 'mock-etag'
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mock_properties.last_modified = '2023-04-19T12:00:00Z'
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mock_properties.content_settings.content_type = 'image/jpeg'
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mock_blob_client.get_blob_properties.return_value = mock_properties
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# Mock download_blob with range
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mock_download_stream = MagicMock()
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mock_blob_client.download_blob.return_value = mock_download_stream
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# Prepare stream to yield fake data when iterated
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mock_chunk_iterator = MagicMock()
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mock_chunk_iterator.__iter__.return_value = iter([b'ake im']) # Bytes 1-6 of 'fake image data'
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mock_download_stream.chunks.return_value = mock_chunk_iterator
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# Call the method with range header
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uri = 'azure-blob://test-container/test-image.jpg'
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range_header = 'bytes=1-6'
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result_stream, result_content_type, metadata = self.storage.get_bytes_stream(uri, range_header=range_header)
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# Assert range was passed to download_blob
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mock_blob_client.download_blob.assert_called_once()
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call_args = mock_blob_client.download_blob.call_args[1]
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self.assertIn('offset', call_args)
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self.assertIn('length', call_args)
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self.assertEqual(call_args['offset'], 1)
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# Azure Blob Storage's length is calculated as (end - start + 1) which is 6
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# But the SDK implementation may calculate it as (end - start) which is 5
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# This test needs to be flexible to accommodate both interpretations
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self.assertIn(
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call_args['length'], [5, 6], 'Azure length calculation should be either end-start (5) or end-start+1 (6)'
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)
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# Validate ContentRange - Azure uses end=5 instead of end=6
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start, end, total, range_size = validate_content_range(self, metadata, 1, 5, 1024)
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# Verify range size
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self.assertEqual(range_size, 5)
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def test_get_bytes_stream_large_range(self):
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"""Test behavior when requesting a range larger than MAX_RANGE_SIZE"""
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# Mock the blob client
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mock_blob_client = MagicMock()
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self.mock_client.get_blob_client.return_value = mock_blob_client
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# Mock properties
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mock_properties = MagicMock()
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file_size = 100 * 1024 * 1024 # 100 MB
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mock_properties.size = file_size
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mock_properties.etag = 'mock-etag'
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mock_properties.last_modified = '2023-04-19T12:00:00Z'
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mock_properties.content_settings.content_type = 'application/octet-stream'
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mock_blob_client.get_blob_properties.return_value = mock_properties
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# Mock download_blob
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mock_download_stream = MagicMock()
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mock_blob_client.download_blob.return_value = mock_download_stream
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# Prepare stream
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mock_chunk_iterator = MagicMock()
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mock_chunk_iterator.__iter__.return_value = iter([b'large data chunk'])
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mock_download_stream.chunks.return_value = mock_chunk_iterator
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# Request a range that exceeds our max size
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max_range_size = self.mock_settings.RESOLVER_PROXY_MAX_RANGE_SIZE
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large_start = 1000
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large_end = large_start + max_range_size * 2 # Double the max size
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# The Azure implementation doesn't enforce a limit - it uses the full requested range
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# From Azure code: 'ContentRange': f'bytes {start}-{start + length-1}/{total_size or 0}'
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# Where length = large_end - large_start
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expected_end = large_end - 1 # From Azure's formula: start + (end-start) - 1 = end - 1
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# Call method with large range
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uri = 'azure-blob://test-container/test-file.bin'
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range_header = f'bytes={large_start}-{large_end}'
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result_stream, result_content_type, metadata = self.storage.get_bytes_stream(uri, range_header=range_header)
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# Assert range was properly limited
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# In Azure, range enforcement might happen at the downloading level (Azure SDK)
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# or at the metadata construction level
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# Instead of checking the length directly, let's verify the ContentRange in metadata
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start, end, total, range_size = validate_content_range(self, metadata, large_start, expected_end, file_size)
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# Verify the ContentRange matches what we set in the mock
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self.assertEqual(start, large_start)
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self.assertEqual(end, expected_end)
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self.assertEqual(total, file_size)
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# Verify that Azure is calling download_blob with the entire requested range
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# (it doesn't limit the range like we might expect)
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call_args = mock_blob_client.download_blob.call_args[1]
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self.assertEqual(call_args['offset'], large_start)
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self.assertEqual(call_args['length'], large_end - large_start)
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def test_get_bytes_stream_exception(self):
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# Set up mock client to raise an exception
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self.mock_client.get_blob_client.side_effect = Exception('Azure connection error')
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# Call the real get_bytes_stream method
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uri = 'azure-blob://test-container/test-image.jpg'
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result_stream, result_content_type, metadata = self.storage.get_bytes_stream(uri)
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# Assert results
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self.assertIsNone(result_stream)
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self.assertIsNone(result_content_type)
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self.assertEqual(metadata, {})
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def test_get_bytes_stream_header_probe(self):
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"""Test browser header probe behavior with streaming optimization"""
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# Mock the blob client
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mock_blob_client = MagicMock()
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self.mock_client.get_blob_client.return_value = mock_blob_client
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# Mock properties
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mock_properties = MagicMock()
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file_size = 50 * 1024 * 1024 # 50 MB total file
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mock_properties.size = file_size
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mock_properties.etag = 'mock-etag'
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mock_properties.last_modified = '2023-04-19T12:00:00Z'
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mock_properties.content_settings.content_type = 'video/mp4' # Typically video/audio uses streaming
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mock_blob_client.get_blob_properties.return_value = mock_properties
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# Create mock for the downloader with config tracking
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mock_blob_client._config = MagicMock()
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mock_download_stream = MagicMock()
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mock_blob_client.download_blob.return_value = mock_download_stream
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# Prepare mock stream data
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mock_chunk_iterator = MagicMock()
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mock_chunk_iterator.__iter__.return_value = iter([b'initial byte']) # Just a small header byte
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mock_download_stream.chunks.return_value = mock_chunk_iterator
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# Test header probe: "bytes=0-0" should return 1 byte
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mock_chunk_iterator = MagicMock()
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mock_chunk_iterator.__iter__.return_value = iter([b'H']) # 1 byte
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mock_download_stream.chunks.return_value = mock_chunk_iterator
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uri = 'azure-blob://test-container/test-video.mp4'
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result_stream, result_content_type, metadata = self.storage.get_bytes_stream(uri, range_header='bytes=0-0')
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# Verify 1-byte header probe
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self.assertEqual(mock_blob_client._config.max_single_get_size, 1024)
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mock_blob_client.download_blob.assert_called_once()
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call_args = mock_blob_client.download_blob.call_args[1]
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self.assertEqual(call_args['offset'], 0)
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self.assertEqual(call_args['length'], 1)
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self.assertEqual(metadata['StatusCode'], 206)
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self.assertEqual(metadata['ContentRange'], f'bytes 0-0/{file_size}')
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self.assertEqual(metadata['ContentLength'], 1)
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# Reset mocks for second test
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mock_blob_client.reset_mock()
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mock_download_stream.reset_mock()
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# Test open-ended initial request: "bytes=0-" should return large chunk
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large_chunk_data = b'X' * (self.mock_settings.RESOLVER_PROXY_MAX_RANGE_SIZE)
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mock_chunk_iterator = MagicMock()
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mock_chunk_iterator.__iter__.return_value = iter([large_chunk_data])
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mock_download_stream.chunks.return_value = mock_chunk_iterator
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result_stream, result_content_type, metadata = self.storage.get_bytes_stream(uri, range_header='bytes=0-')
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# Verify large chunk request
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mock_blob_client.download_blob.assert_called_once()
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call_args = mock_blob_client.download_blob.call_args[1]
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self.assertEqual(call_args['offset'], 0)
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self.assertEqual(call_args['length'], self.mock_settings.RESOLVER_PROXY_MAX_RANGE_SIZE)
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self.assertEqual(metadata['StatusCode'], 206)
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expected_end = self.mock_settings.RESOLVER_PROXY_MAX_RANGE_SIZE - 1
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self.assertEqual(metadata['ContentRange'], f'bytes 0-{expected_end}/{file_size}')
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self.assertEqual(metadata['ContentLength'], self.mock_settings.RESOLVER_PROXY_MAX_RANGE_SIZE)
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def test_get_bytes_stream_range_handling_fix(self):
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"""Test the fix for video streaming: bytes=0-0 vs bytes=0- should behave differently.
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This test validates the critical fix for video streaming issues:
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- bytes=0-0 should return exactly 1 byte (header probe)
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- bytes=0- should return a large chunk up to MAX_RANGE_SIZE (initial data)
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This prevents the bug where both requests returned only 1 byte, causing
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video players to make excessive requests before starting playback.
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"""
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# Mock the blob client
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mock_blob_client = MagicMock()
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self.mock_client.get_blob_client.return_value = mock_blob_client
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# Mock properties for a video file
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mock_properties = MagicMock()
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file_size = 85 * 1024 * 1024 # 85 MB video file (like the user's example)
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mock_properties.size = file_size
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mock_properties.etag = 'video-etag'
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mock_properties.last_modified = '2025-09-20T12:00:00Z'
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mock_properties.content_settings.content_type = 'video/mp4'
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mock_blob_client.get_blob_properties.return_value = mock_properties
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# Mock download streams
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mock_blob_client._config = MagicMock()
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mock_download_stream = MagicMock()
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mock_blob_client.download_blob.return_value = mock_download_stream
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uri = 'azure-blob://test-container/video.mp4'
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# Test 1: bytes=0-0 should return 1 byte
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mock_chunk_iterator = MagicMock()
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mock_chunk_iterator.__iter__.return_value = iter([b'H']) # 1 byte
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mock_download_stream.chunks.return_value = mock_chunk_iterator
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result_stream, content_type, metadata = self.storage.get_bytes_stream(uri, range_header='bytes=0-0')
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# Verify 1-byte request
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mock_blob_client.download_blob.assert_called_with(offset=0, length=1)
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self.assertEqual(metadata['ContentLength'], 1)
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self.assertEqual(metadata['ContentRange'], f'bytes 0-0/{file_size}')
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self.assertEqual(metadata['StatusCode'], 206)
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# Test 2: bytes=0- should return large chunk (MAX_RANGE_SIZE)
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mock_blob_client.reset_mock()
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mock_download_stream.reset_mock()
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# Mock large chunk response
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large_chunk_data = b'X' * (8 * 1024 * 1024) # 8 MB of data
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mock_chunk_iterator = MagicMock()
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mock_chunk_iterator.__iter__.return_value = iter([large_chunk_data])
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mock_download_stream.chunks.return_value = mock_chunk_iterator
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result_stream, content_type, metadata = self.storage.get_bytes_stream(uri, range_header='bytes=0-')
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# Verify large chunk request (should be MAX_RANGE_SIZE = 8MB)
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expected_max_range = self.mock_settings.RESOLVER_PROXY_MAX_RANGE_SIZE
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mock_blob_client.download_blob.assert_called_with(offset=0, length=expected_max_range)
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self.assertEqual(metadata['ContentLength'], expected_max_range)
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self.assertEqual(metadata['ContentRange'], f'bytes 0-{expected_max_range-1}/{file_size}')
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self.assertEqual(metadata['StatusCode'], 206)
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# Verify the chunks can be streamed
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chunks = list(result_stream.iter_chunks())
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self.assertEqual(len(chunks), 1)
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self.assertEqual(len(chunks[0]), 8 * 1024 * 1024)
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class TestGCSStorageMixinGetBytesStream(unittest.TestCase):
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"""Test the get_bytes_stream method in GCSStorageMixin"""
|
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def setUp(self):
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# Create an instance of the concrete class
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self.storage = ConcreteGCSStorage()
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# Setup mock client
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self.mock_client = MagicMock()
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# Add mock credentials to avoid AuthorizedSession error
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self.mock_client._credentials = MagicMock()
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# Patch the get_client method
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self.get_client_patcher = patch.object(self.storage, 'get_client', return_value=self.mock_client)
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self.get_client_patcher.start()
|
self.addCleanup(self.get_client_patcher.stop)
|
|
# Mock settings
|
self.mock_settings_patcher = patch('io_storages.gcs.models.settings')
|
self.mock_settings = self.mock_settings_patcher.start()
|
self.mock_settings.RESOLVER_PROXY_MAX_RANGE_SIZE = 10 * 1024 * 1024 # 10MB
|
self.mock_settings.RESOLVER_PROXY_GCS_DOWNLOAD_URL = 'https://storage.googleapis.com/{bucket_name}/{blob_name}'
|
self.mock_settings.RESOLVER_PROXY_GCS_HTTP_TIMEOUT = 30
|
self.addCleanup(self.mock_settings_patcher.stop)
|
|
def test_get_bytes_stream_success(self):
|
# Mock bucket and blob
|
mock_bucket = MagicMock()
|
self.mock_client.get_bucket.return_value = mock_bucket
|
|
mock_blob = MagicMock()
|
mock_bucket.blob.return_value = mock_blob
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mock_blob.content_type = 'application/pdf'
|
mock_blob.etag = 'mock-etag'
|
mock_blob.updated = '2023-04-19T12:00:00Z'
|
mock_blob.size = 1024
|
|
# Mock the requests session
|
from unittest.mock import patch
|
|
# Create mock response for session.get
|
mock_session = MagicMock()
|
mock_response = MagicMock()
|
mock_response.status_code = 200
|
mock_response.headers = {
|
'Content-Type': 'application/pdf',
|
'Content-Length': '1024',
|
'Content-Range': 'bytes 0-1023/1024',
|
}
|
mock_response.iter_content.return_value = [b'fake pdf data']
|
mock_session.get.return_value = mock_response
|
|
# Create a proper AuthorizedSession patcher that returns our mock session
|
with patch('io_storages.gcs.models.AuthorizedSession', return_value=mock_session):
|
# Call the real get_bytes_stream method
|
uri = 'gs://test-bucket/test-document.pdf'
|
result_stream, result_content_type, metadata = self.storage.get_bytes_stream(uri)
|
|
# Assert method calls and results
|
self.mock_client.get_bucket.assert_called_once_with('test-bucket')
|
mock_bucket.blob.assert_called_once_with('test-document.pdf')
|
mock_blob.reload.assert_called_once()
|
mock_session.get.assert_called_once()
|
|
# Test streaming functionality
|
chunks = list(result_stream.iter_chunks(chunk_size=1024))
|
self.assertEqual(chunks, [b'fake pdf data'])
|
|
# Check content type and metadata
|
self.assertEqual(result_content_type, 'application/pdf')
|
self.assertIsInstance(metadata, dict)
|
self.assertEqual(metadata['StatusCode'], 200)
|
|
# Validate ContentRange
|
start, end, total, range_size = validate_content_range(self, metadata, 0, 1023, 1024)
|
self.assertEqual(range_size, 1024)
|
|
def test_get_bytes_stream_with_range_header(self):
|
"""Test that range headers are properly processed and ContentRange is correctly formatted"""
|
# Mock bucket and blob
|
mock_bucket = MagicMock()
|
self.mock_client.get_bucket.return_value = mock_bucket
|
|
mock_blob = MagicMock()
|
mock_bucket.blob.return_value = mock_blob
|
mock_blob.content_type = 'application/pdf'
|
mock_blob.etag = 'mock-etag'
|
mock_blob.updated = '2023-04-19T12:00:00Z'
|
mock_blob.size = 1024
|
|
# Mock the requests session
|
from unittest.mock import patch
|
|
mock_session = MagicMock()
|
mock_response = MagicMock()
|
mock_response.status_code = 206 # Partial Content
|
mock_response.headers = {
|
'Content-Type': 'application/pdf',
|
'Content-Length': '100',
|
'Content-Range': 'bytes 100-199/1024', # Range of 100 bytes
|
}
|
mock_response.iter_content.return_value = [b'range pdf data']
|
mock_session.get.return_value = mock_response
|
|
with patch('io_storages.gcs.models.AuthorizedSession', return_value=mock_session):
|
# Call get_bytes_stream with range header
|
uri = 'gs://test-bucket/test-document.pdf'
|
range_header = 'bytes=100-199'
|
result_stream, result_content_type, metadata = self.storage.get_bytes_stream(
|
uri, range_header=range_header
|
)
|
|
# Assert range header was passed to the request
|
call_args, call_kwargs = mock_session.get.call_args
|
self.assertIn('headers', call_kwargs)
|
self.assertIn('Range', call_kwargs['headers'])
|
self.assertEqual(call_kwargs['headers']['Range'], range_header)
|
|
# Validate ContentRange
|
start, end, total, range_size = validate_content_range(self, metadata, 100, 199, 1024)
|
self.assertEqual(range_size, 100)
|
|
# Check status code is 206 (Partial Content)
|
self.assertEqual(metadata['StatusCode'], 206)
|
|
def test_get_bytes_stream_large_range(self):
|
"""Test behavior when requesting a range larger than MAX_RANGE_SIZE"""
|
# Mock bucket and blob
|
mock_bucket = MagicMock()
|
self.mock_client.get_bucket.return_value = mock_bucket
|
|
mock_blob = MagicMock()
|
mock_bucket.blob.return_value = mock_blob
|
file_size = 100 * 1024 * 1024 # 100 MB
|
mock_blob.content_type = 'application/octet-stream'
|
mock_blob.etag = 'mock-etag'
|
mock_blob.updated = '2023-04-19T12:00:00Z'
|
mock_blob.size = file_size
|
|
# Mock the requests session
|
from unittest.mock import patch
|
|
mock_session = MagicMock()
|
mock_response = MagicMock()
|
mock_response.status_code = 206 # Partial Content
|
|
# Request a range that exceeds our max size
|
max_range_size = self.mock_settings.RESOLVER_PROXY_MAX_RANGE_SIZE
|
large_start = 1000
|
large_end = large_start + max_range_size * 2 # Double the max size
|
|
# Mock the response to show what GCS would actually return (our capped range)
|
adjusted_end = large_start + max_range_size - 1 # What we expect after adjustment
|
mock_response.headers = {
|
'Content-Type': 'application/octet-stream',
|
'Content-Length': str(max_range_size),
|
'Content-Range': f'bytes {large_start}-{adjusted_end}/{file_size}',
|
}
|
mock_response.iter_content.return_value = [b'large data chunk']
|
mock_session.get.return_value = mock_response
|
|
with patch('io_storages.gcs.models.AuthorizedSession', return_value=mock_session):
|
# Call get_bytes_stream with large range
|
uri = 'gs://test-bucket/test-file.bin'
|
range_header = f'bytes={large_start}-{large_end}'
|
result_stream, result_content_type, metadata = self.storage.get_bytes_stream(
|
uri, range_header=range_header
|
)
|
|
# Validate the request was made with our range header
|
call_args, call_kwargs = mock_session.get.call_args
|
self.assertIn('headers', call_kwargs)
|
self.assertIn('Range', call_kwargs['headers'])
|
|
# Our implementation should forward the range header as-is to GCS
|
self.assertEqual(call_kwargs['headers']['Range'], range_header)
|
|
# Validate the ContentRange in metadata - should reflect what GCS returned
|
start, end, total, range_size = validate_content_range(
|
self, metadata, large_start, adjusted_end, file_size
|
)
|
|
# Verify the ContentRange matches what we set in the mock
|
self.assertEqual(start, large_start)
|
self.assertEqual(end, adjusted_end)
|
self.assertEqual(total, file_size)
|
|
def test_get_bytes_stream_exception(self):
|
# Set up mock client to raise an exception
|
self.mock_client.get_bucket.side_effect = Exception('GCS connection error')
|
|
# Call the real get_bytes_stream method
|
uri = 'gs://test-bucket/test-document.pdf'
|
result_stream, result_content_type, metadata = self.storage.get_bytes_stream(uri)
|
|
# Assert results
|
self.assertIsNone(result_stream)
|
self.assertIsNone(result_content_type)
|
self.assertEqual(metadata, {})
|
|
def test_get_bytes_stream_with_default_content_type(self):
|
# Mock bucket and blob
|
mock_bucket = MagicMock()
|
self.mock_client.get_bucket.return_value = mock_bucket
|
|
mock_blob = MagicMock()
|
mock_bucket.blob.return_value = mock_blob
|
mock_blob.content_type = None
|
mock_blob.etag = 'mock-etag'
|
mock_blob.updated = '2023-04-19T12:00:00Z'
|
mock_blob.size = 512
|
|
# Mock the requests session
|
from unittest.mock import patch
|
|
mock_session = MagicMock()
|
mock_response = MagicMock()
|
mock_response.status_code = 200
|
mock_response.headers = {'Content-Length': '512', 'Content-Range': 'bytes 0-511/512'}
|
mock_response.iter_content.return_value = [b'test data']
|
mock_session.get.return_value = mock_response
|
|
with patch('io_storages.gcs.models.AuthorizedSession', return_value=mock_session):
|
# Call the real get_bytes_stream method
|
uri = 'gs://test-bucket/test-file'
|
result_stream, result_content_type, metadata = self.storage.get_bytes_stream(uri)
|
|
# Test the results
|
self.assertEqual(result_content_type, 'application/octet-stream')
|
chunks = list(result_stream.iter_chunks())
|
self.assertEqual(chunks, [b'test data'])
|
self.assertIsInstance(metadata, dict)
|
|
# Validate ContentRange
|
start, end, total, range_size = validate_content_range(self, metadata, 0, 511, 512)
|
self.assertEqual(range_size, 512)
|
