107 lines
2.9 KiB
Go
107 lines
2.9 KiB
Go
// Copyright 2023 LiveKit, Inc.
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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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package utils
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import (
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"context"
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"errors"
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"testing"
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"time"
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"github.com/stretchr/testify/require"
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"go.uber.org/atomic"
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)
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func TestHedgeCall(t *testing.T) {
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t.Run("success", func(t *testing.T) {
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var attempts atomic.Uint32
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res, err := HedgeCall(context.Background(), HedgeParams[uint32]{
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Timeout: 200 * time.Millisecond,
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RetryDelay: 50 * time.Millisecond,
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MaxAttempts: 2,
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Func: func(context.Context) (uint32, error) {
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n := attempts.Add(1)
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time.Sleep(75 * time.Millisecond)
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return n, nil
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},
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})
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require.NoError(t, err)
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require.EqualValues(t, 1, res)
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require.EqualValues(t, 2, attempts.Load())
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})
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t.Run("recoverable error", func(t *testing.T) {
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var recoverableErr = errors.New("recoverable")
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var attempts atomic.Uint32
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res, err := HedgeCall(context.Background(), HedgeParams[uint32]{
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Timeout: 200 * time.Millisecond,
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RetryDelay: 50 * time.Millisecond,
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MaxAttempts: 2,
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IsRecoverable: func(err error) bool {
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return errors.Is(err, recoverableErr)
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},
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Func: func(context.Context) (uint32, error) {
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n := attempts.Add(1)
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if n == 1 {
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return n, recoverableErr
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}
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return n, nil
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},
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})
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require.NoError(t, err)
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require.EqualValues(t, 2, res)
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})
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t.Run("unrecoverable error", func(t *testing.T) {
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var recoverableErr = errors.New("recoverable")
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var unrecoverableErr = errors.New("unrecoverable")
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var attempts atomic.Uint32
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_, err := HedgeCall(context.Background(), HedgeParams[uint32]{
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Timeout: 200 * time.Millisecond,
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RetryDelay: 50 * time.Millisecond,
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MaxAttempts: 3,
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IsRecoverable: func(err error) bool {
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return !errors.Is(err, unrecoverableErr)
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},
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Func: func(context.Context) (uint32, error) {
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n := attempts.Add(1)
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if n == 1 {
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return n, recoverableErr
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}
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return n, unrecoverableErr
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},
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})
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require.ErrorIs(t, err, unrecoverableErr)
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require.EqualValues(t, 2, attempts.Load())
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})
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t.Run("max failures", func(t *testing.T) {
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var attempts atomic.Uint32
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_, err := HedgeCall(context.Background(), HedgeParams[uint32]{
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Timeout: 200 * time.Millisecond,
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RetryDelay: 50 * time.Millisecond,
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MaxAttempts: 2,
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Func: func(context.Context) (uint32, error) {
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n := attempts.Add(1)
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return n, errors.New("failure")
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},
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})
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require.ErrorIs(t, err, ErrMaxAttemptsReached)
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require.EqualValues(t, 2, attempts.Load())
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})
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}
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