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config_test.go
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config_test.go
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/*
*
* Copyright 2021 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 ringhash
import (
"testing"
"github.com/google/go-cmp/cmp"
"google.golang.org/grpc/internal/envconfig"
)
func (s) TestParseConfig(t *testing.T) {
tests := []struct {
name string
js string
envConfigLimit uint64
want *LBConfig
wantErr bool
}{
{
name: "OK",
js: `{"minRingSize": 1, "maxRingSize": 2}`,
want: &LBConfig{MinRingSize: 1, MaxRingSize: 2},
},
{
name: "OK with default min",
js: `{"maxRingSize": 2000}`,
want: &LBConfig{MinRingSize: defaultMinSize, MaxRingSize: 2000},
},
{
name: "OK with default max",
js: `{"minRingSize": 2000}`,
want: &LBConfig{MinRingSize: 2000, MaxRingSize: defaultMaxSize},
},
{
name: "min greater than max",
js: `{"minRingSize": 10, "maxRingSize": 2}`,
want: nil,
wantErr: true,
},
{
name: "min greater than max greater than global limit",
js: `{"minRingSize": 6000, "maxRingSize": 5000}`,
want: nil,
wantErr: true,
},
{
name: "max greater than global limit",
js: `{"minRingSize": 1, "maxRingSize": 6000}`,
want: &LBConfig{MinRingSize: 1, MaxRingSize: 4096},
},
{
name: "min and max greater than global limit",
js: `{"minRingSize": 5000, "maxRingSize": 6000}`,
want: &LBConfig{MinRingSize: 4096, MaxRingSize: 4096},
},
{
name: "min and max less than raised global limit",
js: `{"minRingSize": 5000, "maxRingSize": 6000}`,
envConfigLimit: 8000,
want: &LBConfig{MinRingSize: 5000, MaxRingSize: 6000},
},
{
name: "min and max greater than raised global limit",
js: `{"minRingSize": 10000, "maxRingSize": 10000}`,
envConfigLimit: 8000,
want: &LBConfig{MinRingSize: 8000, MaxRingSize: 8000},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if tt.envConfigLimit != 0 {
old := envconfig.XDSRingHashLimit
defer func() { envconfig.XDSRingHashLimit = old }()
envconfig.XDSRingHashLimit = tt.envConfigLimit
}
got, err := parseConfig([]byte(tt.js))
if (err != nil) != tt.wantErr {
t.Errorf("parseConfig() error = %v, wantErr %v", err, tt.wantErr)
return
}
if diff := cmp.Diff(got, tt.want); diff != "" {
t.Errorf("parseConfig() got unexpected output, diff (-got +want): %v", diff)
}
})
}
}