110 lines
2.3 KiB
Go
110 lines
2.3 KiB
Go
package terraform
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import (
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"bytes"
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"encoding/gob"
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"errors"
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"io"
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"reflect"
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"sync"
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"testing"
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)
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func TestReadWriteStateV1(t *testing.T) {
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state := &StateV1{
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Resources: map[string]*ResourceStateV1{
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"foo": &ResourceStateV1{
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ID: "bar",
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ConnInfo: map[string]string{
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"type": "ssh",
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"user": "root",
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"password": "supersecret",
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},
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},
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},
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}
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// Checksum before the write
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chksum := checksumStruct(t, state)
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buf := new(bytes.Buffer)
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if err := testWriteStateV1(state, buf); err != nil {
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t.Fatalf("err: %s", err)
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}
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// Checksum after the write
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chksumAfter := checksumStruct(t, state)
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if chksumAfter != chksum {
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t.Fatalf("structure changed during serialization!")
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}
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actual, err := ReadStateV1(buf)
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if err != nil {
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t.Fatalf("err: %s", err)
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}
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// ReadState should not restore sensitive information!
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state.Resources["foo"].ConnInfo = nil
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if !reflect.DeepEqual(actual, state) {
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t.Fatalf("bad: %#v", actual)
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}
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}
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// sensitiveState is used to store sensitive state information
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// that should not be serialized. This is only used temporarily
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// and is restored into the state.
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type sensitiveState struct {
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ConnInfo map[string]map[string]string
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once sync.Once
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}
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func (s *sensitiveState) init() {
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s.once.Do(func() {
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s.ConnInfo = make(map[string]map[string]string)
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})
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}
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// testWriteStateV1 writes a state somewhere in a binary format.
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// Only for testing now
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func testWriteStateV1(d *StateV1, dst io.Writer) error {
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// Write the magic bytes so we can determine the file format later
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n, err := dst.Write([]byte(stateFormatMagic))
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if err != nil {
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return err
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}
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if n != len(stateFormatMagic) {
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return errors.New("failed to write state format magic bytes")
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}
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// Write a version byte so we can iterate on version at some point
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n, err = dst.Write([]byte{stateFormatVersion})
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if err != nil {
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return err
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}
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if n != 1 {
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return errors.New("failed to write state version byte")
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}
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// Prevent sensitive information from being serialized
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sensitive := &sensitiveState{}
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sensitive.init()
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for name, r := range d.Resources {
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if r.ConnInfo != nil {
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sensitive.ConnInfo[name] = r.ConnInfo
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r.ConnInfo = nil
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}
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}
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// Serialize the state
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err = gob.NewEncoder(dst).Encode(d)
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// Restore the state
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for name, info := range sensitive.ConnInfo {
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d.Resources[name].ConnInfo = info
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}
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return err
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}
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