blob: 57720c10ade30794f7b8c25f352f3d58b25282db [file] [log] [blame]
// Copyright 2017, OpenCensus 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 view
import (
"context"
"testing"
"go.opencensus.io/tag"
)
func TestEncodeDecodeTags(t *testing.T) {
ctx := context.Background()
type testData struct {
m *tag.Map
keys []tag.Key
want map[tag.Key][]byte
}
k1, err := tag.NewKey("/encodedecodetest/k1")
if err != nil {
t.Fatal(err)
}
k2, err := tag.NewKey("/encodedecodetest/k2")
if err != nil {
t.Fatal(err)
}
k3, err := tag.NewKey("/encodedecodetest/k3")
if err != nil {
t.Fatal(err)
}
ctx1, _ := tag.New(ctx)
ctx2, _ := tag.New(ctx, tag.Insert(k2, "v2"))
ctx3, _ := tag.New(ctx, tag.Insert(k1, "v1"), tag.Insert(k2, "v2"))
ctx4, _ := tag.New(ctx, tag.Insert(k1, "v1"), tag.Insert(k2, "v2"), tag.Insert(k3, "v3"))
m1 := tag.FromContext(ctx1)
m2 := tag.FromContext(ctx2)
m3 := tag.FromContext(ctx3)
m4 := tag.FromContext(ctx4)
tests := []testData{
{
m1,
[]tag.Key{k1},
nil,
},
{
m2,
[]tag.Key{},
nil,
},
{
m2,
[]tag.Key{k1},
nil,
},
{
m2,
[]tag.Key{k2},
map[tag.Key][]byte{
k2: []byte("v2"),
},
},
{
m3,
[]tag.Key{k1},
map[tag.Key][]byte{
k1: []byte("v1"),
},
},
{
m3,
[]tag.Key{k1, k2},
map[tag.Key][]byte{
k1: []byte("v1"),
k2: []byte("v2"),
},
},
{
m4,
[]tag.Key{k3, k1},
map[tag.Key][]byte{
k1: []byte("v1"),
k3: []byte("v3"),
},
},
}
for label, tt := range tests {
tags := decodeTags(encodeWithKeys(tt.m, tt.keys), tt.keys)
if got, want := len(tags), len(tt.want); got != want {
t.Fatalf("%d: len(decoded) = %v; not %v", label, got, want)
}
for _, tag := range tags {
if _, ok := tt.want[tag.Key]; !ok {
t.Errorf("%d: missing key %v", label, tag.Key)
}
if got, want := tag.Value, string(tt.want[tag.Key]); got != want {
t.Errorf("%d: got value %q; want %q", label, got, want)
}
}
}
}