mirror of https://github.com/grpc/grpc-go.git
124 lines
2.8 KiB
Go
124 lines
2.8 KiB
Go
/*
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*
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* Copyright 2019 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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package grpclb
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import (
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"encoding/json"
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"testing"
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"github.com/google/go-cmp/cmp"
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"google.golang.org/grpc/serviceconfig"
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)
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func (s) TestParse(t *testing.T) {
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tests := []struct {
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name string
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sc string
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want serviceconfig.LoadBalancingConfig
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wantErr bool
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}{
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{
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name: "empty",
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sc: "",
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want: nil,
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wantErr: true,
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},
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{
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name: "success1",
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sc: `
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{
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"childPolicy": [
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{"pick_first":{}}
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],
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"serviceName": "foo-service"
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}`,
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want: &grpclbServiceConfig{
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ChildPolicy: &[]map[string]json.RawMessage{
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{"pick_first": json.RawMessage("{}")},
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},
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ServiceName: "foo-service",
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},
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},
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{
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name: "success2",
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sc: `
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{
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"childPolicy": [
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{"round_robin":{}},
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{"pick_first":{}}
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],
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"serviceName": "foo-service"
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}`,
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want: &grpclbServiceConfig{
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ChildPolicy: &[]map[string]json.RawMessage{
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{"round_robin": json.RawMessage("{}")},
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{"pick_first": json.RawMessage("{}")},
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},
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ServiceName: "foo-service",
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},
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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got, err := (&lbBuilder{}).ParseConfig(json.RawMessage(tt.sc))
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if (err != nil) != (tt.wantErr) {
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t.Fatalf("ParseConfig(%q) returned error: %v, wantErr: %v", tt.sc, err, tt.wantErr)
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}
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if diff := cmp.Diff(tt.want, got); diff != "" {
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t.Fatalf("ParseConfig(%q) returned unexpected difference (-want +got):\n%s", tt.sc, diff)
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}
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})
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}
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}
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func (s) TestChildIsPickFirst(t *testing.T) {
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tests := []struct {
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name string
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s string
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want bool
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}{
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{
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name: "pickfirst_only",
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s: `{"childPolicy":[{"pick_first":{}}]}`,
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want: true,
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},
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{
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name: "pickfirst_before_rr",
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s: `{"childPolicy":[{"pick_first":{}},{"round_robin":{}}]}`,
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want: true,
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},
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{
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name: "rr_before_pickfirst",
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s: `{"childPolicy":[{"round_robin":{}},{"pick_first":{}}]}`,
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want: false,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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gc, err := (&lbBuilder{}).ParseConfig(json.RawMessage(tt.s))
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if err != nil {
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t.Fatalf("Parse(%v) = _, %v; want _, nil", tt.s, err)
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}
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if got := childIsPickFirst(gc.(*grpclbServiceConfig)); got != tt.want {
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t.Errorf("childIsPickFirst() = %v, want %v", got, tt.want)
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}
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})
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}
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}
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