snapshot of https://github.com/grpc/grpc-go.git (master, 2026-09-15; blobs > 131072B omitted)

internal/xds/xds_test.go

@@ -0,0 +1,115 @@
+/*
+ *
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package xds
+
+import (
+	"reflect"
+	"strings"
+	"testing"
+	"unicode"
+
+	corepb "github.com/envoyproxy/go-control-plane/envoy/api/v2/core"
+	"github.com/google/go-cmp/cmp"
+	"google.golang.org/grpc/internal/grpctest"
+	"google.golang.org/grpc/internal/xds/clients"
+)
+
+const ignorePrefix = "XXX_"
+
+type s struct {
+	grpctest.Tester
+}
+
+func Test(t *testing.T) {
+	grpctest.RunSubTests(t, s{})
+}
+
+func ignore(name string) bool {
+	if !unicode.IsUpper([]rune(name)[0]) {
+		return true
+	}
+	return strings.HasPrefix(name, ignorePrefix)
+}
+
+// A reflection based test to make sure internal.Locality contains all the
+// fields (expect for XXX_) from the proto message.
+func (s) TestLocalityMatchProtoMessage(t *testing.T) {
+	want1 := make(map[string]string)
+	for ty, i := reflect.TypeOf(clients.Locality{}), 0; i < ty.NumField(); i++ {
+		f := ty.Field(i)
+		if ignore(f.Name) {
+			continue
+		}
+		want1[f.Name] = f.Type.Name()
+	}
+
+	want2 := make(map[string]string)
+	for ty, i := reflect.TypeOf(corepb.Locality{}), 0; i < ty.NumField(); i++ {
+		f := ty.Field(i)
+		if ignore(f.Name) {
+			continue
+		}
+		want2[f.Name] = f.Type.Name()
+	}
+
+	if diff := cmp.Diff(want1, want2); diff != "" {
+		t.Fatalf("internal type and proto message have different fields: (-got +want):\n%+v", diff)
+	}
+}
+
+func TestLocalityToAndFromString(t *testing.T) {
+	tests := []struct {
+		name       string
+		localityID clients.Locality
+		str        string
+		wantErr    bool
+	}{
+		{
+			name:       "3 fields",
+			localityID: clients.Locality{Region: "r:r", Zone: "z#z", SubZone: "s^s"},
+			str:        `{region="r:r", zone="z#z", sub_zone="s^s"}`,
+		},
+		{
+			name:       "2 fields",
+			localityID: clients.Locality{Region: "r:r", Zone: "z#z"},
+			str:        `{region="r:r", zone="z#z", sub_zone=""}`,
+		},
+		{
+			name:       "1 field",
+			localityID: clients.Locality{Region: "r:r"},
+			str:        `{region="r:r", zone="", sub_zone=""}`,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			gotStr := LocalityString(tt.localityID)
+			if gotStr != tt.str {
+				t.Errorf("%#v.String() = %q, want %q", tt.localityID, gotStr, tt.str)
+			}
+
+			gotID, err := LocalityFromString(tt.str)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("clients.LocalityFromString(%q) error = %v, wantErr %v", tt.str, err, tt.wantErr)
+				return
+			}
+			if diff := cmp.Diff(gotID, tt.localityID); diff != "" {
+				t.Errorf("clients.LocalityFromString() got = %v, want %v, diff: %s", gotID, tt.localityID, diff)
+			}
+		})
+	}
+}