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43 lines
1.2 KiB
Go

package metrics
// Tests for Prometheus metrics registration with a custom registry.
import (
"testing"
"github.com/prometheus/client_golang/prometheus"
"github.com/stretchr/testify/require"
)
// TestNewMetrics_WithCustomRegistry ensures new metrics with custom registry behavior is handled correctly.
func TestNewMetrics_WithCustomRegistry(t *testing.T) {
registry := prometheus.NewRegistry()
m := NewMetrics(Config{ServiceName: "svc", Enabled: true, Registry: registry})
require.NotNil(t, m)
require.NotNil(t, m.HTTPRequestsTotal)
require.NotNil(t, m.DBConnectionsActive)
require.NotNil(t, m.ScoreDistribution)
}
// TestConfigFromEnvDefaults ensures config from env defaults behavior is handled correctly.
func TestConfigFromEnvDefaults(t *testing.T) {
t.Setenv("METRICS_ENABLED", "")
t.Setenv("METRICS_SERVICE_NAME", "")
cfg := ConfigFromEnv()
def := DefaultConfig()
require.Equal(t, def, cfg)
}
// TestConfigFromEnvOverrides ensures config from env overrides behavior is handled correctly.
func TestConfigFromEnvOverrides(t *testing.T) {
t.Setenv("METRICS_ENABLED", "false")
t.Setenv("METRICS_SERVICE_NAME", "admin-service")
cfg := ConfigFromEnv()
require.False(t, cfg.Enabled)
require.Equal(t, "admin-service", cfg.ServiceName)
}