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logger.go
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/
logger.go
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// Copyright 2018 Istio Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package data
import (
"bytes"
"fmt"
)
// Logger is used to capture the events that happen within fake adapters & templates during testing.
type Logger struct {
b bytes.Buffer
}
// Write s to the log, with a prefix of name. A newline character is added.
func (l *Logger) Write(name string, s string) {
if l != nil {
fmt.Fprintf(&l.b, "[%s] %s\n", name, s)
}
}
// WriteFormat writes a formatted string to the log, with a prefix of name. A newline character is added.
func (l *Logger) WriteFormat(name string, format string, args ...interface{}) {
if l != nil {
s := fmt.Sprintf(format, args...)
l.Write(name, s)
}
}
// Clear the contents of this logger. Useful for reducing the event output to Write more readable tests.
func (l *Logger) Clear() {
if l != nil {
l.b.Reset()
}
}
// String returns the current contents of the log.
func (l *Logger) String() string {
if l == nil {
return ""
}
return l.b.String()
}