1 files changed, 53 insertions, 0 deletions
diff --git a/internal/metrics/generator_test.go b/internal/metrics/generator_test.go
new file mode 100644
index 0000000..69395eb
--- /dev/null
+++ b/internal/metrics/generator_test.go
@@ -0,0 +1,53 @@
+package metrics
+
+import (
+	"testing"
+)
+
+func TestNewCollectors(t *testing.T) {
+	collectors := NewCollectors()
+
+	if collectors.RequestsTotal == nil {
+		t.Error("RequestsTotal should not be nil")
+	}
+	if collectors.ActiveConnections == nil {
+		t.Error("ActiveConnections should not be nil")
+	}
+	if collectors.TemperatureCelsius == nil {
+		t.Error("TemperatureCelsius should not be nil")
+	}
+	if collectors.RequestDuration == nil {
+		t.Error("RequestDuration should not be nil")
+	}
+	if collectors.JobsProcessed == nil {
+		t.Error("JobsProcessed should not be nil")
+	}
+}
+
+func TestCollectors_Simulate(t *testing.T) {
+	collectors := NewCollectors()
+
+	// Should not panic
+	collectors.Simulate()
+
+	// Run multiple times to test randomness
+	for i := 0; i < 10; i++ {
+		collectors.Simulate()
+	}
+}
+
+func TestCollectors_SimulateMetrics(t *testing.T) {
+	collectors := NewCollectors()
+
+	// Test that metrics get values after simulation
+	collectors.Simulate()
+
+	// We can't easily inspect the values without the prometheus client,
+	// but we can verify the collectors were created properly
+	if collectors.RequestsTotal == nil {
+		t.Error("RequestsTotal not initialized")
+	}
+	if collectors.JobsProcessed == nil {
+		t.Error("JobsProcessed not initialized")
+	}
+}