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

balancer/weightedtarget/weightedtarget_config_test.go

@@ -0,0 +1,104 @@
+/*
+ *
+ * Copyright 2020 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 weightedtarget
+
+import (
+	"testing"
+
+	"github.com/google/go-cmp/cmp"
+	"google.golang.org/grpc/balancer"
+	_ "google.golang.org/grpc/balancer/grpclb"
+	"google.golang.org/grpc/balancer/roundrobin"
+	internalserviceconfig "google.golang.org/grpc/internal/serviceconfig"
+)
+
+const (
+	testJSONConfig = `{
+  "targets": {
+	"cluster_1": {
+	  "weight": 75,
+	  "childPolicy": [{
+        "grpclb": {
+          "childPolicy": [{"pick_first":{}}],
+          "targetName": "foo-service"
+        }
+      }]
+	},
+	"cluster_2": {
+	  "weight": 25,
+	  "childPolicy": [{"round_robin": ""}]
+	}
+  }
+}`
+)
+
+var (
+	grpclbConfigParser = balancer.Get("grpclb").(balancer.ConfigParser)
+	grpclbConfigJSON   = `{"childPolicy": [{"pick_first":{}}], "targetName": "foo-service"}`
+	grpclbConfig, _    = grpclbConfigParser.ParseConfig([]byte(grpclbConfigJSON))
+)
+
+func (s) TestParseConfig(t *testing.T) {
+	tests := []struct {
+		name    string
+		js      string
+		want    *LBConfig
+		wantErr bool
+	}{
+		{
+			name:    "empty json",
+			js:      "",
+			want:    nil,
+			wantErr: true,
+		},
+		{
+			name: "OK",
+			js:   testJSONConfig,
+			want: &LBConfig{
+				Targets: map[string]Target{
+					"cluster_1": {
+						Weight: 75,
+						ChildPolicy: &internalserviceconfig.BalancerConfig{
+							Name:   "grpclb",
+							Config: grpclbConfig,
+						},
+					},
+					"cluster_2": {
+						Weight: 25,
+						ChildPolicy: &internalserviceconfig.BalancerConfig{
+							Name: roundrobin.Name,
+						},
+					},
+				},
+			},
+			wantErr: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := parseConfig([]byte(tt.js))
+			if (err != nil) != tt.wantErr {
+				t.Fatalf("parseConfig() error = %v, wantErr %v", err, tt.wantErr)
+			}
+			if !cmp.Equal(got, tt.want) {
+				t.Errorf("parseConfig() got unexpected result, diff: %v", cmp.Diff(got, tt.want))
+			}
+		})
+	}
+}