forked from grpc/grpc-go
/
grpclb_config_test.go
123 lines (118 loc) · 2.78 KB
/
grpclb_config_test.go
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/*
*
* 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 grpclb
import (
"encoding/json"
"testing"
"github.com/google/go-cmp/cmp"
"google.golang.org/grpc/serviceconfig"
)
func (s) TestParse(t *testing.T) {
tests := []struct {
name string
sc string
want serviceconfig.LoadBalancingConfig
wantErr bool
}{
{
name: "empty",
sc: "",
want: nil,
wantErr: true,
},
{
name: "success1",
sc: `
{
"childPolicy": [
{"pick_first":{}}
],
"targetName": "foo-service"
}`,
want: &grpclbServiceConfig{
ChildPolicy: &[]map[string]json.RawMessage{
{"pick_first": json.RawMessage("{}")},
},
TargetName: "foo-service",
},
},
{
name: "success2",
sc: `
{
"childPolicy": [
{"round_robin":{}},
{"pick_first":{}}
],
"targetName": "foo-service"
}`,
want: &grpclbServiceConfig{
ChildPolicy: &[]map[string]json.RawMessage{
{"round_robin": json.RawMessage("{}")},
{"pick_first": json.RawMessage("{}")},
},
TargetName: "foo-service",
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got, err := (&lbBuilder{}).ParseConfig(json.RawMessage(tt.sc))
if (err != nil) != (tt.wantErr) {
t.Fatalf("ParseConfig(%q) returned error: %v, wantErr: %v", tt.sc, err, tt.wantErr)
}
if diff := cmp.Diff(tt.want, got); diff != "" {
t.Fatalf("ParseConfig(%q) returned unexpected difference (-want +got):\n%s", tt.sc, diff)
}
})
}
}
func (s) TestChildIsPickFirst(t *testing.T) {
tests := []struct {
name string
s string
want bool
}{
{
name: "pickfirst_only",
s: `{"childPolicy":[{"pick_first":{}}]}`,
want: true,
},
{
name: "pickfirst_before_rr",
s: `{"childPolicy":[{"pick_first":{}},{"round_robin":{}}]}`,
want: true,
},
{
name: "rr_before_pickfirst",
s: `{"childPolicy":[{"round_robin":{}},{"pick_first":{}}]}`,
want: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
gc, err := (&lbBuilder{}).ParseConfig(json.RawMessage(tt.s))
if err != nil {
t.Fatalf("Parse(%v) = _, %v; want _, nil", tt.s, err)
}
if got := childIsPickFirst(gc.(*grpclbServiceConfig)); got != tt.want {
t.Errorf("childIsPickFirst() = %v, want %v", got, tt.want)
}
})
}
}