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https://github.com/open-telemetry/opentelemetry-go.git
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738ef11e31
* Resolve flaky global ErrorHandler delegation test Remove multi-goroutine approach and just test what needs to be tested. * Assert instead of require where appropriate
98 lines
2.2 KiB
Go
98 lines
2.2 KiB
Go
// Copyright The OpenTelemetry Authors
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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 otel
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import (
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"bytes"
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"errors"
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"log"
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"testing"
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"github.com/stretchr/testify/suite"
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)
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type errLogger []string
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func (l *errLogger) Write(p []byte) (int, error) {
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msg := bytes.TrimRight(p, "\n")
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(*l) = append(*l, string(msg))
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return len(msg), nil
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}
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func (l *errLogger) Reset() {
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*l = errLogger([]string{})
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}
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func (l *errLogger) Got() []string {
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return []string(*l)
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}
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type HandlerTestSuite struct {
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suite.Suite
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origHandler *loggingErrorHandler
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errLogger *errLogger
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}
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func (s *HandlerTestSuite) SetupSuite() {
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s.errLogger = new(errLogger)
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s.origHandler = globalErrorHandler
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globalErrorHandler = &loggingErrorHandler{
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l: log.New(s.errLogger, "", 0),
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}
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}
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func (s *HandlerTestSuite) TearDownSuite() {
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globalErrorHandler = s.origHandler
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}
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func (s *HandlerTestSuite) SetupTest() {
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s.errLogger.Reset()
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}
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func (s *HandlerTestSuite) TestGlobalHandler() {
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errs := []string{"one", "two"}
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GetErrorHandler().Handle(errors.New(errs[0]))
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Handle(errors.New(errs[1]))
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s.Assert().Equal(errs, s.errLogger.Got())
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}
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func (s *HandlerTestSuite) TestNoDropsOnDelegate() {
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causeErr := func() func() {
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err := errors.New("")
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return func() {
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Handle(err)
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}
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}()
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causeErr()
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s.Require().Len(s.errLogger.Got(), 1)
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// Change to another Handler. We are testing this is loss-less.
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newErrLogger := new(errLogger)
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secondary := &loggingErrorHandler{
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l: log.New(newErrLogger, "", 0),
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}
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SetErrorHandler(secondary)
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causeErr()
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s.Assert().Len(s.errLogger.Got(), 1, "original Handler used after delegation")
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s.Assert().Len(newErrLogger.Got(), 1, "new Handler not used after delegation")
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}
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func TestHandlerTestSuite(t *testing.T) {
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suite.Run(t, new(HandlerTestSuite))
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}
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