test: unauthorized_node_cannot_receive_dispersed_data

tests/data_confidentiality/test_data_confidentiality.py

@@ -0,0 +1,48 @@
+import json
+
+import pytest
+
+from src.client.nomos_cli import NomosCli
+from src.env_vars import CONSENSUS_SLOT_TIME, NOMOS
+from src.libs.common import delay, to_app_id, to_index
+from src.libs.custom_logger import get_custom_logger
+from src.node.nomos_node import NomosNode
+from src.steps.common import ensure_nodes_ready
+from src.steps.da import StepsDataAvailability
+from src.test_data import DATA_TO_DISPERSE
+
+logger = get_custom_logger(__name__)
+
+
+class TestDataConfidentiality(StepsDataAvailability):
+    main_nodes = []
+
+    @pytest.mark.usefixtures("setup_2_node_cluster")
+    def test_unauthorized_node_cannot_receive_dispersed_data(self):
+        self.disperse_data(DATA_TO_DISPERSE[1], to_app_id(1), to_index(0))
+        delay(CONSENSUS_SLOT_TIME)
+        rcv_data = self.get_data_range(self.node2, to_app_id(1), to_index(0), to_index(5))
+        rcv_data_json = json.dumps(rcv_data)
+
+        decoded_data = NomosCli(command="reconstruct").run(input_values=[rcv_data_json], decode_only=True)
+
+        assert DATA_TO_DISPERSE[1] == decoded_data, "Retrieved data are not same with original data"
+        self.node2.stop()
+        # Start new node with the same IP address
+        self.nodeX = NomosNode(NOMOS, "nomos_node_0")
+        self.nodeX.start()
+
+        try:
+            ensure_nodes_ready(self.nodeX)
+        except Exception as ex:
+            logger.error(f"REST service did not become ready in time: {ex}")
+            raise
+
+        delay(CONSENSUS_SLOT_TIME)
+
+        self.disperse_data(DATA_TO_DISPERSE[2], to_app_id(2), to_index(0))
+        delay(CONSENSUS_SLOT_TIME)
+        try:
+            rcv_data = self.get_data_range(self.nodeX, to_app_id(2), to_index(0), to_index(5))
+        except AssertionError as ae:
+            assert "Get data range response is empty" in str(ae), "Get data range response should be empty"