test(metrics): add integration tests for metrics retrieval

- Create `metrics_test.py` to test the `Metrics` class
- Implement test for the `retrieve()` method
- Verify all expected system metrics fields are p

Author: tharropoulos

tests/metrics_test.py

@@ -0,0 +1,26 @@
+"""Tests for the Debug class."""
+
+from __future__ import annotations
+
+from typesense.metrics import Metrics
+
+
+def test_actual_retrieve(actual_metrics: Metrics) -> None:
+    """Test that the Debug object can retrieve a debug on Typesense server and verify response structure."""
+    response = actual_metrics.retrieve()
+
+    assert "system_cpu_active_percentage" in response
+    assert "system_disk_total_bytes" in response
+    assert "system_disk_used_bytes" in response
+    assert "system_memory_total_bytes" in response
+    assert "system_memory_used_bytes" in response
+    assert "system_network_received_bytes" in response
+    assert "system_network_sent_bytes" in response
+    assert "typesense_memory_active_bytes" in response
+    assert "typesense_memory_allocated_bytes" in response
+    assert "typesense_memory_fragmentation_ratio" in response
+
+    assert "typesense_memory_mapped_bytes" in response
+    assert "typesense_memory_metadata_bytes" in response
+    assert "typesense_memory_resident_bytes" in response
+    assert "typesense_memory_retained_bytes" in response