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58 lines
1.5 KiB
Go
58 lines
1.5 KiB
Go
/*
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Copyright 2018 The Kubernetes Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package genericclioptions
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import (
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"bytes"
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"io"
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"io/ioutil"
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)
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// IOStreams provides the standard names for iostreams. This is useful for embedding and for unit testing.
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// Inconsistent and different names make it hard to read and review code
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type IOStreams struct {
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// In think, os.Stdin
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In io.Reader
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// Out think, os.Stdout
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Out io.Writer
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// ErrOut think, os.Stderr
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ErrOut io.Writer
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}
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// NewTestIOStreams returns a valid IOStreams and in, out, errout buffers for unit tests
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func NewTestIOStreams() (IOStreams, *bytes.Buffer, *bytes.Buffer, *bytes.Buffer) {
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in := &bytes.Buffer{}
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out := &bytes.Buffer{}
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errOut := &bytes.Buffer{}
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return IOStreams{
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In: in,
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Out: out,
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ErrOut: errOut,
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}, in, out, errOut
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}
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// NewTestIOStreamsDiscard returns a valid IOStreams that just discards
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func NewTestIOStreamsDiscard() IOStreams {
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in := &bytes.Buffer{}
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return IOStreams{
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In: in,
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Out: ioutil.Discard,
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ErrOut: ioutil.Discard,
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}
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}
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