Add heap scheduler tests

tests/integration/test_scheduler_string_lifetime.py

@@ -0,0 +1,130 @@
+"""String lifetime test - verify scheduler handles string destruction correctly."""
+
+import asyncio
+from pathlib import Path
+import re
+
+from aioesphomeapi import UserService
+import pytest
+
+from .types import APIClientConnectedFactory, RunCompiledFunction
+
+
+@pytest.mark.asyncio
+async def test_scheduler_string_lifetime(
+    yaml_config: str,
+    run_compiled: RunCompiledFunction,
+    api_client_connected: APIClientConnectedFactory,
+) -> None:
+    """Test that scheduler correctly handles string lifetimes when strings go out of scope."""
+
+    # Get the absolute path to the external components directory
+    external_components_path = str(
+        Path(__file__).parent / "fixtures" / "external_components"
+    )
+
+    # Replace the placeholder in the YAML config with the actual path
+    yaml_config = yaml_config.replace(
+        "EXTERNAL_COMPONENT_PATH", external_components_path
+    )
+
+    # Create a future to signal test completion
+    loop = asyncio.get_event_loop()
+    test_complete_future: asyncio.Future[None] = loop.create_future()
+
+    # Track test progress
+    test_stats = {
+        "tests_passed": 0,
+        "tests_failed": 0,
+        "errors": [],
+        "use_after_free_detected": False,
+    }
+
+    def on_log_line(line: str) -> None:
+        # Track test results from the C++ test output
+        if "Tests passed:" in line and "string_lifetime" in line:
+            # Extract the number from "Tests passed: 32"
+            match = re.search(r"Tests passed:\s*(\d+)", line)
+            if match:
+                test_stats["tests_passed"] = int(match.group(1))
+        elif "Tests failed:" in line and "string_lifetime" in line:
+            match = re.search(r"Tests failed:\s*(\d+)", line)
+            if match:
+                test_stats["tests_failed"] = int(match.group(1))
+        elif "ERROR" in line and "string_lifetime" in line:
+            test_stats["errors"].append(line)
+
+        # Check for memory corruption indicators
+        if any(
+            indicator in line.lower()
+            for indicator in [
+                "use after free",
+                "heap corruption",
+                "segfault",
+                "abort",
+                "assertion",
+                "sanitizer",
+                "bad memory",
+                "invalid pointer",
+            ]
+        ):
+            test_stats["use_after_free_detected"] = True
+            if not test_complete_future.done():
+                test_complete_future.set_exception(
+                    Exception(f"Memory corruption detected: {line}")
+                )
+            return
+
+        # Check for completion
+        if "String lifetime tests complete" in line and not test_complete_future.done():
+            test_complete_future.set_result(None)
+
+    async with (
+        run_compiled(yaml_config, line_callback=on_log_line),
+        api_client_connected() as client,
+    ):
+        # Verify we can connect
+        device_info = await client.device_info()
+        assert device_info is not None
+        assert device_info.name == "scheduler-string-lifetime-test"
+
+        # List entities and services
+        _, services = await asyncio.wait_for(
+            client.list_entities_services(), timeout=5.0
+        )
+
+        # Find our test service
+        run_test_service: UserService | None = None
+        for service in services:
+            if service.name == "run_string_lifetime_test":
+                run_test_service = service
+                break
+
+        assert run_test_service is not None, (
+            "run_string_lifetime_test service not found"
+        )
+
+        # Call the service to start the test
+        client.execute_service(run_test_service, {})
+
+        # Wait for test to complete
+        try:
+            await asyncio.wait_for(test_complete_future, timeout=30.0)
+        except asyncio.TimeoutError:
+            pytest.fail(f"String lifetime test timed out. Stats: {test_stats}")
+        except Exception as e:
+            pytest.fail(f"Test failed: {e}\nStats: {test_stats}")
+
+        # Check for use-after-free
+        assert not test_stats["use_after_free_detected"], "Use-after-free detected!"
+
+        # Check for any errors
+        assert test_stats["tests_failed"] == 0, f"Tests failed: {test_stats['errors']}"
+
+        # Verify we had the expected number of passing tests and no failures
+        assert test_stats["tests_passed"] == 30, (
+            f"Expected exactly 30 tests to pass, but got {test_stats['tests_passed']}"
+        )
+        assert test_stats["tests_failed"] == 0, (
+            f"Expected no test failures, but got {test_stats['tests_failed']} failures"
+        )