chore: add tests for tracing

pkg/config/tracing_test.go

@@ -0,0 +1,24 @@
+package config
+
+import (
+	"github.com/guregu/null/v5"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestTracingInvalid(t *testing.T) {
+	t.Parallel()
+
+	tracing := TracingConfig{Enabled: null.BoolFrom(true)}
+	err := tracing.Validate()
+	assert.Error(t, err)
+}
+
+func TestTracingValid(t *testing.T) {
+	t.Parallel()
+
+	tracing := TracingConfig{Enabled: null.BoolFrom(true), OpenTelemetryHTTPHost: "test"}
+	err := tracing.Validate()
+	assert.NoError(t, err)
+}