[Testing] add a testing logger for third parties test usage (#58)

* [Testing] add a testing logger for third parties test usage

* fix codeclimate

testing/logger.go

@@ -0,0 +1,88 @@
+package testing
+
+import (
+	"sync"
+
+	"github.com/gol4ng/logger"
+)
+
+// Logger can be use in third party in order to do assertion on logged entry
+type Logger struct {
+	mu      sync.Mutex
+	entries []logger.Entry
+}
+
+// CleanEntries will reset the in memory entries list
+func (l *Logger) CleanEntries() {
+	defer l.lock()()
+	l.entries = []logger.Entry{}
+}
+
+// GetEntries will return the in memory entries list
+func (l *Logger) GetEntries() []logger.Entry {
+	return l.entries
+}
+
+// GetAndCleanEntries will return and clean the in memory entries list
+func (l *Logger) GetAndCleanEntries() []logger.Entry {
+	defer l.lock()()
+	entries := l.GetEntries()
+	l.CleanEntries()
+	return entries
+}
+
+// Debug will log a debug message
+func (l *Logger) Debug(message string, context *logger.Context) error {
+	return l.Log(message, logger.DebugLevel, context)
+}
+
+// Info will log a info message
+func (l *Logger) Info(message string, context *logger.Context) error {
+	return l.Log(message, logger.InfoLevel, context)
+}
+
+// Notice will log a notice message
+func (l *Logger) Notice(message string, context *logger.Context) error {
+	return l.Log(message, logger.NoticeLevel, context)
+}
+
+// Warning will log a warning message
+func (l *Logger) Warning(message string, context *logger.Context) error {
+	return l.Log(message, logger.WarningLevel, context)
+}
+
+// Error will log a error message
+func (l *Logger) Error(message string, context *logger.Context) error {
+	return l.Log(message, logger.ErrorLevel, context)
+}
+
+// Critical will log a critical message
+func (l *Logger) Critical(message string, context *logger.Context) error {
+	return l.Log(message, logger.CriticalLevel, context)
+}
+
+// Alert will log a alert message
+func (l *Logger) Alert(message string, context *logger.Context) error {
+	return l.Log(message, logger.AlertLevel, context)
+}
+
+// Emergency will log a emergency message
+func (l *Logger) Emergency(message string, context *logger.Context) error {
+	return l.Log(message, logger.EmergencyLevel, context)
+}
+
+// Log will log a message with a given level
+func (l *Logger) Log(message string, level logger.Level, context *logger.Context) error {
+	defer l.lock()()
+	l.entries = append(l.entries, logger.Entry{
+		Message: message,
+		Level:   level,
+		Context: context,
+	})
+	return nil
+}
+
+func (l *Logger) lock() func() {
+	l.mu.Lock()
+	return func() { l.mu.Unlock() }
+}