test: add unit tests for types package

internal/types/metrics_test.go

@@ -0,0 +1,78 @@
+package types
+
+import (
+	"testing"
+	"time"
+)
+
+func TestMetricPoint_GetTimestamp(t *testing.T) {
+	now := time.Now()
+	point := MetricPoint{
+		Value:     42.5,
+		Timestamp: now,
+	}
+
+	result := point.GetTimestamp()
+	if !result.Equal(now) {
+		t.Errorf("GetTimestamp() = %v, want %v", result, now)
+	}
+}
+
+func TestMetricPoint_ZeroValue(t *testing.T) {
+	var point MetricPoint
+
+	// Zero value should have zero time
+	if !point.Timestamp.IsZero() {
+		t.Error("Zero MetricPoint should have zero timestamp")
+	}
+	if point.Value != 0 {
+		t.Errorf("Zero MetricPoint Value = %v, want 0", point.Value)
+	}
+}
+
+func TestIOMetrics_Fields(t *testing.T) {
+	now := time.Now()
+	metrics := IOMetrics{
+		DiskRead:   1000,
+		DiskWrite:  2000,
+		NetworkIn:  3000,
+		NetworkOut: 4000,
+		Timestamp:  now,
+	}
+
+	if metrics.DiskRead != 1000 {
+		t.Errorf("DiskRead = %v, want 1000", metrics.DiskRead)
+	}
+	if metrics.DiskWrite != 2000 {
+		t.Errorf("DiskWrite = %v, want 2000", metrics.DiskWrite)
+	}
+	if metrics.NetworkIn != 3000 {
+		t.Errorf("NetworkIn = %v, want 3000", metrics.NetworkIn)
+	}
+	if metrics.NetworkOut != 4000 {
+		t.Errorf("NetworkOut = %v, want 4000", metrics.NetworkOut)
+	}
+	if !metrics.Timestamp.Equal(now) {
+		t.Errorf("Timestamp = %v, want %v", metrics.Timestamp, now)
+	}
+}
+
+func TestIOMetrics_ZeroValue(t *testing.T) {
+	var metrics IOMetrics
+
+	if metrics.DiskRead != 0 {
+		t.Error("Zero IOMetrics should have zero DiskRead")
+	}
+	if metrics.DiskWrite != 0 {
+		t.Error("Zero IOMetrics should have zero DiskWrite")
+	}
+	if metrics.NetworkIn != 0 {
+		t.Error("Zero IOMetrics should have zero NetworkIn")
+	}
+	if metrics.NetworkOut != 0 {
+		t.Error("Zero IOMetrics should have zero NetworkOut")
+	}
+	if !metrics.Timestamp.IsZero() {
+		t.Error("Zero IOMetrics should have zero Timestamp")
+	}
+}