[#133] Change reporter usage

Signed-off-by: Andrey Berezin <a.berezin@yadro.com>

src/frostfs_testlib/reporter/__init__.py

@@ -1,3 +1,5 @@
+from typing import Any
+
 from frostfs_testlib.reporter.allure_handler import AllureHandler
 from frostfs_testlib.reporter.interfaces import ReporterHandler
 from frostfs_testlib.reporter.reporter import Reporter
@@ -20,3 +22,7 @@ def get_reporter() -> Reporter:
 
 def step(title: str):
     return __reporter.step(title)
+
+
+def attach(content: Any, file_name: str):
+    return __reporter.attach(content, file_name)

src/frostfs_testlib/reporter/allure_handler.py

@@ -21,9 +21,14 @@ class AllureHandler(ReporterHandler):
 
     def attach(self, body: Any, file_name: str) -> None:
         attachment_name, extension = os.path.splitext(file_name)
+        if extension.startswith("."):
+            extension = extension[1:]
         attachment_type = self._resolve_attachment_type(extension)
 
-        allure.attach(body, attachment_name, attachment_type, extension)
+        if os.path.exists(body):
+            allure.attach.file(body, file_name, attachment_type, extension)
+        else:
+            allure.attach(body, attachment_name, attachment_type, extension)
 
     def _resolve_attachment_type(self, extension: str) -> attachment_type:
         """Try to find matching Allure attachment type by extension.