Move shared code to testlib

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

src/frostfs_testlib/load/load_verifiers.py

@@ -0,0 +1,36 @@
+import logging
+
+from frostfs_testlib.load.load_config import LoadParams, LoadScenario
+from frostfs_testlib.load.load_metrics import get_metrics_object
+
+logger = logging.getLogger("NeoLogger")
+
+
+class LoadVerifier:
+    def __init__(self, load_params: LoadParams) -> None:
+        self.load_params = load_params
+
+    def verify_summaries(self, load_summary, verification_summary) -> None:
+        if not verification_summary or not load_summary:
+            logger.info("Can't check load results due to missing summary")
+
+        load_metrics = get_metrics_object(self.load_params.scenario, load_summary)
+        writers = self.load_params.writers or 0
+
+        objects_count = load_metrics.write_success_iterations
+        fails_count = load_metrics.write_failed_iterations
+
+        if writers > 0:
+            assert objects_count > 0, "Total put objects should be greater than 0"
+        assert fails_count == 0, f"There were {fails_count} failed put objects operations"
+
+        if verification_summary:
+            verify_metrics = get_metrics_object(LoadScenario.VERIFY, verification_summary)
+            verified_objects = verify_metrics.read_success_iterations
+            invalid_objects = verify_metrics.read_failed_iterations
+
+            assert invalid_objects == 0, f"There were {invalid_objects} verification fails"
+            # Due to interruptions we may see total verified objects to be less than written on writers count
+            assert (
+                abs(objects_count - verified_objects) <= writers
+            ), f"Verified objects is less than total objects. Total: {objects_count}, Verified: {verified_objects}. Writers: {writers}."