[#310] Extend bucket testsuite

- Added tests to check correctness of bucket names according to AWS specification
- Added test to check availability of non-empty bucket after attempting to delete it

Signed-off-by: Kirill Sosnovskikh <k.sosnovskikh@yadro.com>

pytest_tests/testsuites/services/s3_gate/test_s3_bucket.py

@@ -1,3 +1,4 @@
+import string
 from datetime import datetime, timedelta
 
 import allure
@@ -6,8 +7,15 @@ from frostfs_testlib import reporter
 from frostfs_testlib.s3 import S3ClientWrapper, VersioningStatus
 from frostfs_testlib.steps.s3 import s3_helper
 from frostfs_testlib.storage.dataclasses.object_size import ObjectSize
+from frostfs_testlib.utils import string_utils
 from frostfs_testlib.utils.file_utils import generate_file
 
+VALID_SYMBOLS_WITHOUT_DOT = string.ascii_lowercase + string.digits + "-"
+VALID_AND_INVALID_SYMBOLS = string.ascii_letters + string.punctuation
+
+# TODO: The dot symbol is temporarily not supported.
+VALID_SYMBOLS_WITH_DOT = VALID_SYMBOLS_WITHOUT_DOT + "."
+
 
 @pytest.mark.nightly
 @pytest.mark.s3_gate
@@ -140,3 +148,95 @@ class TestS3GateBucket:
             s3_client.delete_bucket(bucket)
             with pytest.raises(Exception, match=r".*Not Found.*"):
                 s3_client.head_bucket(bucket)
+
+    @allure.title("Create bucket with valid name length (s3_client={s3_client}, length={length})")
+    @pytest.mark.parametrize("length", [3, 4, 32, 62, 63])
+    def test_s3_create_bucket_with_valid_length(self, s3_client: S3ClientWrapper, length: int):
+        bucket_name = string_utils.random_string(length, VALID_SYMBOLS_WITHOUT_DOT)
+        while not (bucket_name[0].isalnum() and bucket_name[-1].isalnum()):
+            bucket_name = string_utils.random_string(length, VALID_SYMBOLS_WITHOUT_DOT)
+
+        with reporter.step("Create bucket with valid name length"):
+            s3_client.create_bucket(bucket_name)
+
+        with reporter.step("Check bucket name in buckets"):
+            assert bucket_name in s3_client.list_buckets()
+
+    @allure.title("[NEGATIVE] Bucket with invalid name length should not be created (s3_client={s3_client}, length={length})")
+    @pytest.mark.parametrize("length", [2, 64, 254, 255, 256])
+    def test_s3_create_bucket_with_invalid_length(self, s3_client: S3ClientWrapper, length: int):
+        bucket_name = string_utils.random_string(length, VALID_SYMBOLS_WITHOUT_DOT)
+        while not (bucket_name[0].isalnum() and bucket_name[-1].isalnum()):
+            bucket_name = string_utils.random_string(length, VALID_SYMBOLS_WITHOUT_DOT)
+
+        with reporter.step("Create bucket with invalid name length and catch exception"):
+            with pytest.raises(Exception, match=".*(?:InvalidBucketName|Invalid bucket name).*"):
+                s3_client.create_bucket(bucket_name)
+
+    @allure.title("[NEGATIVE] Bucket with invalid name should not be created (s3_client={s3_client}, bucket_name={bucket_name})")
+    @pytest.mark.parametrize(
+        "bucket_name",
+        [
+            "BUCKET-1",
+            "buckeT-2",
+            # The following case for AWS CLI is not handled correctly
+            # "-bucket-3",
+            "bucket-4-",
+            ".bucket-5",
+            "bucket-6.",
+            "bucket..7",
+            "bucket+8",
+            "bucket_9",
+            "bucket 10",
+            "127.10.5.11",
+            "xn--bucket-12",
+            "bucket-13-s3alias",
+            # The following names can be used in FrostFS but are prohibited by the AWS specification.
+            # "sthree-bucket-14"
+            # "sthree-configurator-bucket-15"
+            # "amzn-s3-demo-bucket-16"
+            # "sthree-bucket-17"
+            # "bucket-18--ol-s3"
+            # "bucket-19--x-s3"
+            # "bucket-20.mrap"
+        ],
+    )
+    def test_s3_create_bucket_with_invalid_name(self, s3_client: S3ClientWrapper, bucket_name: str):
+        with reporter.step("Create bucket with invalid name and catch exception"):
+            with pytest.raises(Exception, match=".*(?:InvalidBucketName|Invalid bucket name).*"):
+                s3_client.create_bucket(bucket_name)
+
+    @allure.title("Non-empty bucket is available after attempting to delete it (s3_client={s3_client})")
+    def test_s3_check_availability_non_empty_bucket_after_deleting(
+        self,
+        s3_client: S3ClientWrapper,
+        simple_object_size: ObjectSize,
+    ):
+        bucket = string_utils.unique_name("bucket-")
+        object_path = generate_file(simple_object_size.value)
+        object_name = s3_helper.object_key_from_file_path(object_path)
+
+        with reporter.step("Create bucket"):
+            s3_client.create_bucket(bucket)
+
+        with reporter.step("Check that bucket is created"):
+            buckets = s3_client.list_buckets()
+            assert buckets, f"Expected non-empty bucket list, got {buckets}"
+            assert bucket in buckets, f"Bucket {bucket} not found in bucket list {buckets}"
+
+        with reporter.step("Put object into bucket"):
+            s3_client.put_object(bucket, object_path)
+
+        with reporter.step("Check that object appears in bucket"):
+            objects = s3_client.list_objects(bucket)
+            assert objects, f"Expected bucket with object, got empty {objects}"
+            assert object_name in objects, f"Object {object_name} not found in bucket object list {objects}"
+
+        with reporter.step("Try to delete not empty bucket and get error"):
+            with pytest.raises(Exception, match=r".*The bucket you tried to delete is not empty.*"):
+                s3_client.delete_bucket(bucket)
+
+        with reporter.step("Check bucket availability"):
+            objects = s3_client.list_objects(bucket)
+            assert objects, f"Expected bucket with object, got empty {objects}"
+            assert object_name in objects, f"Object {object_name} not found in bucket object list {objects}"