Added power outage test

tests/goth_tests/test_power_outage.py

@@ -0,0 +1,111 @@
+import logging
+import os
+from pathlib import Path
+from typing import List
+
+import pytest
+
+from goth.assertions import EventStream
+from goth.configuration import load_yaml, Override
+from goth.runner.log import configure_logging
+from goth.runner import Runner
+from goth.runner.probe import RequestorProbe, ProviderProbe
+
+from yapapi.log import SummaryLogger
+
+from .assertions import assert_no_errors, assert_tasks_processed
+
+
+logger = logging.getLogger("goth.test.power_outage")
+
+ALL_TASKS = {"0", "10", "20", "30", "40", "50"}
+
+
+# Temporal assertions expressing properties of sequences of "events". In this case, each "event"
+# is just a line of output from `blender.py`.
+
+
+async def assert_all_tasks_started(output_lines: EventStream[str]):
+    """Assert that for every task a line with `Task started on provider` will appear."""
+    await assert_tasks_processed(ALL_TASKS, "started on provider", output_lines)
+
+
+async def assert_all_tasks_computed(output_lines: EventStream[str]):
+    """Assert that for every task a line with `Task computed by provider` will appear."""
+    await assert_tasks_processed(ALL_TASKS, "finished by provider", output_lines)
+
+
+""" Test when provider has a power outage.
+
+    Start a regular blender task, when the first task is started on the provider it gets 
+    shut down. The requestor is supposed to send all tasks to the other machine and complete
+    the task. The invoice for the power-outage provider will not be paid. """
+
+
+@pytest.mark.asyncio
+async def test_power_outage(
+    project_dir: Path, log_dir: Path, goth_config_path: Path, config_overrides: List[Override]
+) -> None:
+
+    # This is the default configuration with 2 wasm/VM providers
+    goth_config = load_yaml(goth_config_path, config_overrides)
+
+    blender_path = project_dir / "examples" / "blender" / "blender.py"
+
+    configure_logging(log_dir)
+
+    runner = Runner(
+        base_log_dir=log_dir,
+        compose_config=goth_config.compose_config,
+    )
+
+    async with runner(goth_config.containers):
+
+        requestor = runner.get_probes(probe_type=RequestorProbe)[0]
+        provider_1 = runner.get_probes(probe_type=ProviderProbe)[0]
+
+        async with requestor.run_command_on_host(
+            f"{blender_path} --subnet-tag goth",
+            env=os.environ,
+        ) as (_cmd_task, cmd_monitor):
+
+            # Add assertions to the command output monitor `cmd_monitor`:
+            cmd_monitor.add_assertion(assert_no_errors)
+            all_sent = cmd_monitor.add_assertion(assert_all_tasks_started)
+            all_computed = cmd_monitor.add_assertion(assert_all_tasks_computed)
+
+            await cmd_monitor.wait_for_pattern(".*Received proposals from 2 ", timeout=20)
+            logger.info("Received proposals")
+
+            await cmd_monitor.wait_for_pattern(".*Agreement proposed ", timeout=10)
+            logger.info("Agreement proposed")
+
+            await cmd_monitor.wait_for_pattern(".*Agreement confirmed ", timeout=10)
+            logger.info("Agreement confirmed")
+
+            await cmd_monitor.wait_for_pattern(
+                ".*Task started on provider 'provider-1'.*", timeout=10
+            )
+
+            logger.debug("Stopping provider 1")
+            await provider_1.stop()
+            provider_1.container.stop()
+            logger.info("Provider 1 stopped.")
+
+            await cmd_monitor.wait_for_pattern(".*Terminated agreement with provider-1")
+            logger.info("Agreement properly terminated")
+
+            await all_sent.wait_for_result(timeout=120)
+            logger.info("All tasks sent")
+
+            await all_computed.wait_for_result(timeout=120)
+            logger.info("All tasks computed, waiting for Golem shutdown")
+
+            await cmd_monitor.wait_for_pattern(".*Unpaid agreements: .*")
+            logger.info("Expected 1 unpaid agreement")
+
+            await cmd_monitor.wait_for_pattern(
+                f".*{SummaryLogger.GOLEM_SHUTDOWN_SUCCESSFUL_MESSAGE}", timeout=120
+            )
+
+            logger.info("Requestor script finished")