feat(config): add metrics bind config to policy file with flag hack

Signed-off-by: Xe Iaso <me@xeiaso.net>

lib/config/metrics_test.go

@@ -0,0 +1,48 @@
+package config
+
+import (
+	"errors"
+	"testing"
+)
+
+func TestMetricsValid(t *testing.T) {
+	for _, tt := range []struct {
+		name  string
+		input *Metrics
+		err   error
+	}{
+		{
+			name: "basic TCP",
+			input: &Metrics{
+				Bind:    ":9090",
+				Network: "tcp",
+			},
+		},
+		{
+			name:  "no bind",
+			input: &Metrics{},
+			err:   ErrNoMetricsBind,
+		},
+		{
+			name:  "no network",
+			input: &Metrics{},
+			err:   ErrNoMetricsNetwork,
+		},
+		{
+			name: "invalid network",
+			input: &Metrics{
+				Bind:    ":9090",
+				Network: "taco",
+			},
+			err: ErrInvalidMetricsNetwork,
+		},
+	} {
+		t.Run(tt.name, func(t *testing.T) {
+			if err := tt.input.Valid(); !errors.Is(err, tt.err) {
+				t.Logf("wanted error: %v", tt.err)
+				t.Logf("got error:    %v", err)
+				t.Error("validation failed")
+			}
+		})
+	}
+}