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fake_logger.go
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fake_logger.go
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package fakelogger
import (
"encoding/json"
"fmt"
"sync"
"code.cloudfoundry.org/lager"
)
type FakeLogger struct {
mutex sync.Mutex
loggedSubjects []string
loggedErrors []error
loggedMessages []string
task string
data lager.Data
}
func NewFakeLogger() *FakeLogger {
return &FakeLogger{
loggedSubjects: []string{},
loggedErrors: []error{},
loggedMessages: []string{},
}
}
func (logger *FakeLogger) Info(subject string, messages ...lager.Data) {
logger.mutex.Lock()
logger.loggedSubjects = append(logger.loggedSubjects, subject)
logger.loggedMessages = append(logger.loggedMessages, logger.squashedMessage(messages...))
logger.mutex.Unlock()
}
func (logger *FakeLogger) Debug(subject string, messages ...lager.Data) {
logger.mutex.Lock()
logger.loggedSubjects = append(logger.loggedSubjects, subject)
logger.loggedMessages = append(logger.loggedMessages, logger.squashedMessage(messages...))
logger.mutex.Unlock()
}
func (logger *FakeLogger) Error(subject string, err error, messages ...lager.Data) {
logger.mutex.Lock()
logger.loggedSubjects = append(logger.loggedSubjects, subject)
logger.loggedErrors = append(logger.loggedErrors, err)
logger.loggedMessages = append(logger.loggedMessages, logger.squashedMessage(messages...))
logger.mutex.Unlock()
}
func (logger *FakeLogger) Fatal(subject string, err error, messages ...lager.Data) {
logger.mutex.Lock()
logger.loggedSubjects = append(logger.loggedSubjects, subject)
logger.loggedErrors = append(logger.loggedErrors, err)
logger.loggedMessages = append(logger.loggedMessages, logger.squashedMessage(messages...))
logger.mutex.Unlock()
}
func (logger *FakeLogger) squashedMessage(messages ...lager.Data) (squashed string) {
for _, message := range messages {
encoded, err := json.Marshal(message)
if err != nil {
panic(fmt.Sprintf("LOGGER GOT AN UNMARSHALABLE MESSAGE: %s", err.Error()))
}
squashed += " - " + string(encoded)
}
return
}
func (logger *FakeLogger) RegisterSink(sink lager.Sink) {}
func (logger *FakeLogger) Session(task string, data ...lager.Data) lager.Logger {
logger.task = task
return logger
}
func (logger *FakeLogger) SessionName() string {
return logger.task
}
func (logger *FakeLogger) WithData(data lager.Data) lager.Logger {
return &FakeLogger{
loggedSubjects: []string{},
loggedErrors: []error{},
loggedMessages: []string{},
data: data,
}
}
func (logger *FakeLogger) LoggedSubjects() []string {
defer logger.mutex.Unlock()
logger.mutex.Lock()
return logger.loggedSubjects[:]
}
func (logger *FakeLogger) LoggedErrors() []error {
defer logger.mutex.Unlock()
logger.mutex.Lock()
return logger.loggedErrors[:]
}
func (logger *FakeLogger) LoggedMessages() []string {
defer logger.mutex.Unlock()
logger.mutex.Lock()
return logger.loggedMessages[:]
}