cloudbridge/test/test_object_store_service.py

import filecmp
import os
import tempfile
import uuid
from datetime import datetime
from io import BytesIO
from test import helpers
from test.helpers import ProviderTestBase
from test.helpers import standard_interface_tests as sit
from unittest import skip

from cloudbridge.cloud.factory import ProviderList
from cloudbridge.cloud.interfaces.exceptions import InvalidNameException
from cloudbridge.cloud.interfaces.provider import TestMockHelperMixin
from cloudbridge.cloud.interfaces.resources import Bucket
from cloudbridge.cloud.interfaces.resources import BucketObject

import requests


class CloudObjectStoreServiceTestCase(ProviderTestBase):

    _multiprocess_can_split_ = True

    @helpers.skipIfNoService(['storage.buckets'])
    def test_crud_bucket(self):
        """
        Create a new bucket, check whether the expected values are set,
        and delete it.
        """

        def create_bucket(name):
            return self.provider.storage.buckets.create(name)

        def cleanup_bucket(bucket):
            bucket.delete()

        with self.assertRaises(InvalidNameException):
            # underscores are not allowed in bucket names
            create_bucket("cb_bucket")

        with self.assertRaises(InvalidNameException):
            # names of length less than 3 should raise an exception
            create_bucket("cb")

        with self.assertRaises(InvalidNameException):
            # names of length greater than 63 should raise an exception
            create_bucket("a" * 64)

        with self.assertRaises(InvalidNameException):
            # bucket name cannot be an IP address
            create_bucket("197.10.100.42")

        sit.check_crud(self, self.provider.storage.buckets, Bucket,
                       "cb-crudbucket", create_bucket, cleanup_bucket,
                       skip_name_check=True)

    @helpers.skipIfNoService(['storage.buckets'])
    def test_crud_bucket_object(self):
        test_bucket = None

        def create_bucket_obj(name):
            obj = test_bucket.objects.create(name)
            # TODO: This is wrong. We shouldn't have to have a separate
            # call to upload some content before being able to delete
            # the content. Maybe the create_object method should accept
            # the file content as a parameter.
            obj.upload("dummy content")
            return obj

        def cleanup_bucket_obj(bucket_obj):
            bucket_obj.delete()

        with helpers.cleanup_action(lambda: test_bucket.delete()):
            name = "cb-crudbucketobj-{0}".format(uuid.uuid4())
            test_bucket = self.provider.storage.buckets.create(name)

            sit.check_crud(self, test_bucket.objects, BucketObject,
                           "cb-bucketobj", create_bucket_obj,
                           cleanup_bucket_obj, skip_name_check=True)

    @helpers.skipIfNoService(['storage.buckets'])
    def test_crud_bucket_object_properties(self):
        """
        Create a new bucket, upload some contents into the bucket, and
        check whether list properly detects the new content.
        Delete everything afterwards.
        """
        name = "cbtestbucketobjs-{0}".format(uuid.uuid4())
        test_bucket = self.provider.storage.buckets.create(name)

        # ensure that the bucket is empty
        objects = test_bucket.objects.list()
        self.assertEqual([], objects)

        with helpers.cleanup_action(lambda: test_bucket.delete()):
            obj_name_prefix = "hello"
            obj_name = obj_name_prefix + "_world.txt"
            obj = test_bucket.objects.create(obj_name)

            with helpers.cleanup_action(lambda: obj.delete()):
                # TODO: This is wrong. We shouldn't have to have a separate
                # call to upload some content before being able to delete
                # the content. Maybe the create_object method should accept
                # the file content as a parameter.
                obj.upload("dummy content")
                objs = test_bucket.objects.list()

                self.assertTrue(
                    isinstance(objs[0].size, int),
                    "Object size property needs to be a int, not {0}".format(
                        type(objs[0].size)))
                self.assertTrue(
                    datetime.strptime(objs[0].last_modified[:23],
                                      "%Y-%m-%dT%H:%M:%S.%f"),
                    "Object's last_modified field format {0} not matching."
                    .format(objs[0].last_modified))

                # check iteration
                iter_objs = list(test_bucket.objects)
                self.assertListEqual(iter_objs, objs)

                obj_too = test_bucket.objects.get(obj_name)
                self.assertTrue(
                    isinstance(obj_too, BucketObject),
                    "Did not get object {0} of expected type.".format(obj_too))

                prefix_filtered_list = test_bucket.objects.list(
                    prefix=obj_name_prefix)
                self.assertTrue(
                    len(objs) == len(prefix_filtered_list) == 1,
                    'The number of objects returned by list function, '
                    'with and without a prefix, are expected to be equal, '
                    'but its detected otherwise.')

            sit.check_delete(self, test_bucket.objects, obj)

    @helpers.skipIfNoService(['storage.buckets'])
    def test_upload_download_bucket_content(self):
        name = "cbtestbucketobjs-{0}".format(uuid.uuid4())
        test_bucket = self.provider.storage.buckets.create(name)

        with helpers.cleanup_action(lambda: test_bucket.delete()):
            obj_name = "hello_upload_download.txt"
            obj = test_bucket.objects.create(obj_name)

            with helpers.cleanup_action(lambda: obj.delete()):
                content = b"Hello World. Here's some content."
                # TODO: Upload and download methods accept different parameter
                # types. Need to make this consistent - possibly provider
                # multiple methods like upload_from_file, from_stream etc.
                obj.upload(content)
                target_stream = BytesIO()
                obj.save_content(target_stream)
                self.assertEqual(target_stream.getvalue(), content)
                target_stream2 = BytesIO()
                for data in obj.iter_content():
                    target_stream2.write(data)
                self.assertEqual(target_stream2.getvalue(), content)

    @helpers.skipIfNoService(['storage.buckets'])
    def test_generate_url(self):
        if self.provider.PROVIDER_ID == ProviderList.OPENSTACK:
            raise self.skipTest("Skip until OpenStack impl is provided")

        name = "cbtestbucketobjs-{0}".format(uuid.uuid4())
        test_bucket = self.provider.storage.buckets.create(name)

        with helpers.cleanup_action(lambda: test_bucket.delete()):
            obj_name = "hello_upload_download.txt"
            obj = test_bucket.objects.create(obj_name)

            with helpers.cleanup_action(lambda: obj.delete()):
                content = b"Hello World. Generate a url."
                obj.upload(content)
                target_stream = BytesIO()
                obj.save_content(target_stream)

                url = obj.generate_url(100)
                if isinstance(self.provider, TestMockHelperMixin):
                    raise self.skipTest(
                        "Skipping rest of test - mock providers can't"
                        " access generated url")
                self.assertEqual(requests.get(url).content, content)

    @helpers.skipIfNoService(['storage.buckets'])
    def test_upload_download_bucket_content_from_file(self):
        name = "cbtestbucketobjs-{0}".format(uuid.uuid4())
        test_bucket = self.provider.storage.buckets.create(name)

        with helpers.cleanup_action(lambda: test_bucket.delete()):
            obj_name = "hello_upload_download.txt"
            obj = test_bucket.objects.create(obj_name)

            with helpers.cleanup_action(lambda: obj.delete()):
                test_file = os.path.join(
                    helpers.get_test_fixtures_folder(), 'logo.jpg')
                obj.upload_from_file(test_file)
                target_stream = BytesIO()
                obj.save_content(target_stream)
                with open(test_file, 'rb') as f:
                    self.assertEqual(target_stream.getvalue(), f.read())

    @skip("Skip unless you want to test swift objects bigger than 5 Gig")
    @helpers.skipIfNoService(['storage.buckets'])
    def test_upload_download_bucket_content_with_large_file(self):
        """
        Creates a 6 Gig file in the temp directory, then uploads it to
        Swift. Once uploaded, then downloads to a new file in the temp
        directory and compares the two files to see if they match.
        """
        temp_dir = tempfile.gettempdir()
        file_name = '6GigTest.tmp'
        six_gig_file = os.path.join(temp_dir, file_name)
        with open(six_gig_file, "wb") as out:
            out.truncate(6 * 1024 * 1024 * 1024)  # 6 Gig...
        with helpers.cleanup_action(lambda: os.remove(six_gig_file)):
            download_file = "{0}/cbtestfile-{1}".format(temp_dir, file_name)
            bucket_name = "cbtestbucketlargeobjs-{0}".format(uuid.uuid4())
            test_bucket = self.provider.storage.buckets.create(bucket_name)
            with helpers.cleanup_action(lambda: test_bucket.delete()):
                test_obj = test_bucket.objects.create(file_name)
                with helpers.cleanup_action(lambda: test_obj.delete()):
                    file_uploaded = test_obj.upload_from_file(six_gig_file)
                    self.assertTrue(file_uploaded, "Could not upload object?")
                    with helpers.cleanup_action(
                            lambda: os.remove(download_file)):
                        with open(download_file, 'wb') as f:
                            test_obj.save_content(f)
                            self.assertTrue(
                                filecmp.cmp(six_gig_file, download_file),
                                "Uploaded file != downloaded")