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opentelemetry-go/sdk/metric/aggregator/aggregatortest/test.go
Eundoo Song e06c9da916
Rename aggregator/test to aggregatortest (#980)
Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>
2020-07-28 14:31:56 -07:00

174 lines
4.3 KiB
Go

// Copyright The OpenTelemetry 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 aggregatortest
import (
"context"
"math/rand"
"os"
"sort"
"testing"
"unsafe"
"go.opentelemetry.io/otel/api/metric"
ottest "go.opentelemetry.io/otel/internal/testing"
export "go.opentelemetry.io/otel/sdk/export/metric"
"go.opentelemetry.io/otel/sdk/metric/aggregator"
)
const Magnitude = 1000
type Profile struct {
NumberKind metric.NumberKind
Random func(sign int) metric.Number
}
func newProfiles() []Profile {
rnd := rand.New(rand.NewSource(rand.Int63()))
return []Profile{
{
NumberKind: metric.Int64NumberKind,
Random: func(sign int) metric.Number {
return metric.NewInt64Number(int64(sign) * int64(rnd.Intn(Magnitude+1)))
},
},
{
NumberKind: metric.Float64NumberKind,
Random: func(sign int) metric.Number {
return metric.NewFloat64Number(float64(sign) * rnd.Float64() * Magnitude)
},
},
}
}
func NewAggregatorTest(mkind metric.Kind, nkind metric.NumberKind) *metric.Descriptor {
desc := metric.NewDescriptor("test.name", mkind, nkind)
return &desc
}
func RunProfiles(t *testing.T, f func(*testing.T, Profile)) {
for _, profile := range newProfiles() {
t.Run(profile.NumberKind.String(), func(t *testing.T) {
f(t, profile)
})
}
}
// Ensure local struct alignment prior to running tests.
func TestMain(m *testing.M) {
fields := []ottest.FieldOffset{
{
Name: "Numbers.numbers",
Offset: unsafe.Offsetof(Numbers{}.numbers),
},
}
if !ottest.Aligned8Byte(fields, os.Stderr) {
os.Exit(1)
}
os.Exit(m.Run())
}
// TODO: Expose Numbers in api/metric for sorting support
type Numbers struct {
// numbers has to be aligned for 64-bit atomic operations.
numbers []metric.Number
kind metric.NumberKind
}
func NewNumbers(kind metric.NumberKind) Numbers {
return Numbers{
kind: kind,
}
}
func (n *Numbers) Append(v metric.Number) {
n.numbers = append(n.numbers, v)
}
func (n *Numbers) Sort() {
sort.Sort(n)
}
func (n *Numbers) Less(i, j int) bool {
return n.numbers[i].CompareNumber(n.kind, n.numbers[j]) < 0
}
func (n *Numbers) Len() int {
return len(n.numbers)
}
func (n *Numbers) Swap(i, j int) {
n.numbers[i], n.numbers[j] = n.numbers[j], n.numbers[i]
}
func (n *Numbers) Sum() metric.Number {
var sum metric.Number
for _, num := range n.numbers {
sum.AddNumber(n.kind, num)
}
return sum
}
func (n *Numbers) Count() int64 {
return int64(len(n.numbers))
}
func (n *Numbers) Min() metric.Number {
return n.numbers[0]
}
func (n *Numbers) Max() metric.Number {
return n.numbers[len(n.numbers)-1]
}
// Median() is an alias for Quantile(0.5).
func (n *Numbers) Median() metric.Number {
// Note that len(n.numbers) is 1 greater than the max element
// index, so dividing by two rounds up. This gives the
// intended definition for Quantile() in tests, which is to
// return the smallest element that is at or above the
// specified quantile.
return n.numbers[len(n.numbers)/2]
}
func (n *Numbers) Points() []metric.Number {
return n.numbers
}
// Performs the same range test the SDK does on behalf of the aggregator.
func CheckedUpdate(t *testing.T, agg export.Aggregator, number metric.Number, descriptor *metric.Descriptor) {
ctx := context.Background()
// Note: Aggregator tests are written assuming that the SDK
// has performed the RangeTest. Therefore we skip errors that
// would have been detected by the RangeTest.
err := aggregator.RangeTest(number, descriptor)
if err != nil {
return
}
if err := agg.Update(ctx, number, descriptor); err != nil {
t.Error("Unexpected Update failure", err)
}
}
func CheckedMerge(t *testing.T, aggInto, aggFrom export.Aggregator, descriptor *metric.Descriptor) {
if err := aggInto.Merge(aggFrom, descriptor); err != nil {
t.Error("Unexpected Merge failure", err)
}
}