156 lines
4.9 KiB
Go
156 lines
4.9 KiB
Go
// Copyright 2016, Google Inc.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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package gax
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import (
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"errors"
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"testing"
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"time"
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"golang.org/x/net/context"
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)
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var canceledContext context.Context
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func init() {
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ctx, cancel := context.WithCancel(context.Background())
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cancel()
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canceledContext = ctx
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}
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// recordSleeper is a test implementation of sleeper.
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type recordSleeper int
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func (s *recordSleeper) sleep(ctx context.Context, _ time.Duration) error {
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*s++
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return ctx.Err()
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}
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type boolRetryer bool
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func (r boolRetryer) Retry(err error) (time.Duration, bool) { return 0, bool(r) }
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func TestInvokeSuccess(t *testing.T) {
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apiCall := func(context.Context, CallSettings) error { return nil }
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var sp recordSleeper
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err := invoke(context.Background(), apiCall, CallSettings{}, sp.sleep)
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if err != nil {
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t.Errorf("found error %s, want nil", err)
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}
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if sp != 0 {
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t.Errorf("slept %d times, should not have slept since the call succeeded", int(sp))
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}
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}
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func TestInvokeNoRetry(t *testing.T) {
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apiErr := errors.New("foo error")
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apiCall := func(context.Context, CallSettings) error { return apiErr }
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var sp recordSleeper
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err := invoke(context.Background(), apiCall, CallSettings{}, sp.sleep)
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if err != apiErr {
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t.Errorf("found error %s, want %s", err, apiErr)
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}
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if sp != 0 {
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t.Errorf("slept %d times, should not have slept since retry is not specified", int(sp))
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}
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}
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func TestInvokeNilRetry(t *testing.T) {
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apiErr := errors.New("foo error")
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apiCall := func(context.Context, CallSettings) error { return apiErr }
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var settings CallSettings
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WithRetry(func() Retryer { return nil }).Resolve(&settings)
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var sp recordSleeper
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err := invoke(context.Background(), apiCall, settings, sp.sleep)
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if err != apiErr {
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t.Errorf("found error %s, want %s", err, apiErr)
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}
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if sp != 0 {
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t.Errorf("slept %d times, should not have slept since retry is not specified", int(sp))
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}
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}
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func TestInvokeNeverRetry(t *testing.T) {
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apiErr := errors.New("foo error")
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apiCall := func(context.Context, CallSettings) error { return apiErr }
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var settings CallSettings
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WithRetry(func() Retryer { return boolRetryer(false) }).Resolve(&settings)
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var sp recordSleeper
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err := invoke(context.Background(), apiCall, settings, sp.sleep)
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if err != apiErr {
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t.Errorf("found error %s, want %s", err, apiErr)
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}
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if sp != 0 {
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t.Errorf("slept %d times, should not have slept since retry is not specified", int(sp))
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}
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}
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func TestInvokeRetry(t *testing.T) {
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const target = 3
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retryNum := 0
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apiErr := errors.New("foo error")
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apiCall := func(context.Context, CallSettings) error {
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retryNum++
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if retryNum < target {
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return apiErr
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}
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return nil
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}
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var settings CallSettings
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WithRetry(func() Retryer { return boolRetryer(true) }).Resolve(&settings)
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var sp recordSleeper
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err := invoke(context.Background(), apiCall, settings, sp.sleep)
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if err != nil {
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t.Errorf("found error %s, want nil, call should have succeeded after %d tries", err, target)
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}
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if sp != target-1 {
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t.Errorf("retried %d times, want %d", int(sp), int(target-1))
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}
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}
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func TestInvokeRetryTimeout(t *testing.T) {
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apiErr := errors.New("foo error")
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apiCall := func(context.Context, CallSettings) error { return apiErr }
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var settings CallSettings
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WithRetry(func() Retryer { return boolRetryer(true) }).Resolve(&settings)
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var sp recordSleeper
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err := invoke(canceledContext, apiCall, settings, sp.sleep)
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if err != context.Canceled {
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t.Errorf("found error %s, want %s", err, context.Canceled)
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}
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}
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