kubernetes io_options 源码
kubernetes io_options 代码
文件路径：/staging/src/k8s.io/cli-runtime/pkg/genericclioptions/io_options.go
/*
Copyright 2018 The Kubernetes 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 genericclioptions
import (
"bytes"
"io"
"io/ioutil"
)
// IOStreams provides the standard names for iostreams. This is useful for embedding and for unit testing.
// Inconsistent and different names make it hard to read and review code
type IOStreams struct {
// In think, os.Stdin
In io.Reader
// Out think, os.Stdout
Out io.Writer
// ErrOut think, os.Stderr
ErrOut io.Writer
}
// NewTestIOStreams returns a valid IOStreams and in, out, errout buffers for unit tests
func NewTestIOStreams() (IOStreams, *bytes.Buffer, *bytes.Buffer, *bytes.Buffer) {
in := &bytes.Buffer{}
out := &bytes.Buffer{}
errOut := &bytes.Buffer{}
return IOStreams{
In: in,
Out: out,
ErrOut: errOut,
}, in, out, errOut
}
// NewTestIOStreamsDiscard returns a valid IOStreams that just discards
func NewTestIOStreamsDiscard() IOStreams {
in := &bytes.Buffer{}
return IOStreams{
In: in,
Out: ioutil.Discard,
ErrOut: ioutil.Discard,
}
}
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