chore(lib/policy): move Checker to its own package to avoid import cycles

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

lib/policy/config/geoip_test.go

@@ -0,0 +1,33 @@
+package config
+
+import (
+	"errors"
+	"testing"
+)
+
+func TestGeoIPValid(t *testing.T) {
+	for _, cs := range []struct {
+		name      string
+		countries []string
+		err       error
+	}{
+		{
+			name:      "basic-working",
+			countries: []string{"US", "Ca", "mx"},
+			err:       nil,
+		},
+	} {
+		t.Run(cs.name, func(t *testing.T) {
+			g := &GeoIP{
+				Countries: cs.countries,
+			}
+			err := g.Valid()
+			if !errors.Is(err, cs.err) {
+				t.Fatalf("wanted error %v but got: %v", cs.err, err)
+			}
+			if err == nil && cs.err != nil {
+				t.Fatalf("wanted error %v but got none", cs.err)
+			}
+		})
+	}
+}