// installFakeSSH creates a fake "ssh" command in a new $PATH,
// updates $PATH, and returns a function to reset $PATH to its
// original value when called.
//
// input may be:
// - nil (ignore input)
// - a string (match input exactly)
// output may be:
// - nil (no output)
// - a string (stdout)
// - a slice of strings, of length two (stdout, stderr)
func installFakeSSH(c *gc.C, input, output interface{}, rc int) testing.Restorer {
fakebin := c.MkDir()
ssh := filepath.Join(fakebin, "ssh")
switch input := input.(type) {
case nil:
case string:
sshexpectedinput := ssh + ".expected-input"
err := ioutil.WriteFile(sshexpectedinput, []byte(input), 0644)
c.Assert(err, gc.IsNil)
default:
c.Errorf("input has invalid type: %T", input)
}
var stdout, stderr string
switch output := output.(type) {
case nil:
case string:
stdout = fmt.Sprintf("cat<<EOF\n%s\nEOF", output)
case []string:
c.Assert(output, gc.HasLen, 2)
stdout = fmt.Sprintf("cat<<EOF\n%s\nEOF", output[0])
stderr = fmt.Sprintf("cat>&2<<EOF\n%s\nEOF", output[1])
}
script := fmt.Sprintf(sshscript, stdout, stderr, rc)
err := ioutil.WriteFile(ssh, []byte(script), 0777)
c.Assert(err, gc.IsNil)
return testing.PatchEnvPathPrepend(fakebin)
}
func (s *BaseSuiteUnpatched) IsRunningLocally(c *gc.C) bool {
restore := gitjujutesting.PatchEnvPathPrepend(s.osPathOrig)
defer restore()
running, err := lxdclient.IsRunningLocally()
c.Assert(err, jc.ErrorIsNil)
return running
}
func (*PatchEnvironmentSuite) TestPatchEnvPathPrepend(c *gc.C) {
oldPath := os.Getenv("PATH")
dir := "/bin/bar"
// just in case something goes wrong
defer os.Setenv("PATH", oldPath)
restore := testing.PatchEnvPathPrepend(dir)
expect := dir + string(os.PathListSeparator) + oldPath
c.Check(os.Getenv("PATH"), gc.Equals, expect)
restore()
c.Check(os.Getenv("PATH"), gc.Equals, oldPath)
}