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fake_exec.go
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fake_exec.go
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/*
Copyright 2014 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 exec
import (
"fmt"
"io"
)
// A simple scripted Interface type.
type FakeExec struct {
CommandScript []FakeCommandAction
CommandCalls int
LookPathFunc func(string) (string, error)
}
type FakeCommandAction func(cmd string, args ...string) Cmd
func (fake *FakeExec) Command(cmd string, args ...string) Cmd {
if fake.CommandCalls > len(fake.CommandScript)-1 {
panic(fmt.Sprintf("ran out of Command() actions. Could not handle command [%d]: %s args: %v", fake.CommandCalls, cmd, args))
}
i := fake.CommandCalls
fake.CommandCalls++
return fake.CommandScript[i](cmd, args...)
}
func (fake *FakeExec) LookPath(file string) (string, error) {
return fake.LookPathFunc(file)
}
// A simple scripted Cmd type.
type FakeCmd struct {
Argv []string
CombinedOutputScript []FakeCombinedOutputAction
CombinedOutputCalls int
CombinedOutputLog [][]string
RunScript []FakeRunAction
RunCalls int
RunLog [][]string
Dirs []string
Stdin io.Reader
Stdout io.Writer
Stderr io.Writer
}
func InitFakeCmd(fake *FakeCmd, cmd string, args ...string) Cmd {
fake.Argv = append([]string{cmd}, args...)
return fake
}
type FakeCombinedOutputAction func() ([]byte, error)
type FakeRunAction func() ([]byte, []byte, error)
func (fake *FakeCmd) SetDir(dir string) {
fake.Dirs = append(fake.Dirs, dir)
}
func (fake *FakeCmd) SetStdin(in io.Reader) {
fake.Stdin = in
}
func (fake *FakeCmd) SetStdout(out io.Writer) {
fake.Stdout = out
}
func (fake *FakeCmd) SetStderr(out io.Writer) {
fake.Stderr = out
}
func (fake *FakeCmd) Run() error {
if fake.RunCalls > len(fake.RunScript)-1 {
panic("ran out of Run() actions")
}
if fake.RunLog == nil {
fake.RunLog = [][]string{}
}
i := fake.RunCalls
fake.RunLog = append(fake.RunLog, append([]string{}, fake.Argv...))
fake.RunCalls++
stdout, stderr, err := fake.RunScript[i]()
if stdout != nil {
fake.Stdout.Write(stdout)
}
if stderr != nil {
fake.Stderr.Write(stderr)
}
return err
}
func (fake *FakeCmd) CombinedOutput() ([]byte, error) {
if fake.CombinedOutputCalls > len(fake.CombinedOutputScript)-1 {
panic("ran out of CombinedOutput() actions")
}
if fake.CombinedOutputLog == nil {
fake.CombinedOutputLog = [][]string{}
}
i := fake.CombinedOutputCalls
fake.CombinedOutputLog = append(fake.CombinedOutputLog, append([]string{}, fake.Argv...))
fake.CombinedOutputCalls++
return fake.CombinedOutputScript[i]()
}
func (fake *FakeCmd) Output() ([]byte, error) {
return nil, fmt.Errorf("unimplemented")
}
func (fake *FakeCmd) Stop() {
// no-op
}
// A simple fake ExitError type.
type FakeExitError struct {
Status int
}
func (fake *FakeExitError) String() string {
return fmt.Sprintf("exit %d", fake.Status)
}
func (fake *FakeExitError) Error() string {
return fake.String()
}
func (fake *FakeExitError) Exited() bool {
return true
}
func (fake *FakeExitError) ExitStatus() int {
return fake.Status
}