Adds tests for the string visitor.

consul/prepared_query/walk_test.go

@@ -0,0 +1,52 @@
+package prepared_query
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/hashicorp/consul/consul/structs"
+)
+
+func TestWalk_ServiceQuery(t *testing.T) {
+	var actual []string
+	fn := func(path string, v reflect.Value) error {
+		actual = append(actual, fmt.Sprintf("%s:%s", path, v.String()))
+		return nil
+	}
+
+	service := &structs.ServiceQuery{
+		Service: "the-service",
+		Failover: structs.QueryDatacenterOptions{
+			Datacenters: []string{"dc1", "dc2"},
+		},
+		Tags: []string{"tag1", "tag2", "tag3"},
+	}
+	if err := walk(service, fn); err != nil {
+		t.Fatalf("err: %v", err)
+	}
+
+	expected := []string{
+		".Service:the-service",
+		".Failover.Datacenters[0]:dc1",
+		".Failover.Datacenters[1]:dc2",
+		".Tags[0]:tag1",
+		".Tags[1]:tag2",
+		".Tags[2]:tag3",
+	}
+	if !reflect.DeepEqual(actual, expected) {
+		t.Fatalf("bad: %#v", actual)
+	}
+}
+
+func TestWalk_Visitor_Errors(t *testing.T) {
+	fn := func(path string, v reflect.Value) error {
+		return fmt.Errorf("bad")
+	}
+
+	service := &structs.ServiceQuery{}
+	err := walk(service, fn)
+	if err == nil || err.Error() != "bad" {
+		t.Fatalf("bad: %#v", err)
+	}
+}