Add disk integration file test

Author: antoplt

test/integration/disk_test.go

@@ -0,0 +1,52 @@
+package integration
+
+import (
+	"testing"
+
+	"github.com/bluewave-labs/capture/internal/metric"
+)
+
+// TestDiskMetricsContent verifies that disk metrics can be collected and contain valid data.
+// It specifically checks that the Mountpoint field is correctly populated for detected disks.
+func TestDiskMetricsContent(t *testing.T) {
+	// Attempt to collect disk metrics using the internal metric package
+	metricsSlice, errs := metric.CollectDiskMetrics()
+
+	// Log any partial errors encountered during collection (e.g. permission denied on specific partitions)
+	// We do not fail the test here as partial failures are expected in some environments.
+	if len(errs) > 0 {
+		t.Logf("Encountered partial errors collecting disk metrics: %v", errs)
+	}
+
+	// Verify that we retrieved at least some metrics
+	if len(metricsSlice) == 0 {
+		t.Log("No disk metrics found. Skipping validation.")
+		return
+	}
+
+	foundValidDisk := false
+
+	for _, m := range metricsSlice {
+		// Assert that the metric is of type *DiskData
+		diskData, ok := m.(*metric.DiskData)
+		if !ok {
+			t.Errorf("Expected *metric.DiskData, got %T", m)
+			continue
+		}
+
+		// Log the discovered device and mountpoint for debugging context
+		t.Logf("Found Disk: Device=%s, Mountpoint=%s", diskData.Device, diskData.Mountpoint)
+
+		// Validation: The Mountpoint field must not be empty
+		if diskData.Mountpoint == "" {
+			t.Errorf("Disk device %s has an empty Mountpoint field", diskData.Device)
+		} else {
+			foundValidDisk = true
+		}
+	}
+
+	// If we iterated through metrics but didn't find any valid disk with a mountpoint, log a warning.
+	if !foundValidDisk {
+		t.Log("WARNING: No valid disks with mountpoints were verified")
+	}
+}