terraform/state/remote/remote_test.go

129 lines
2.8 KiB
Go

package remote
import (
"bytes"
"crypto/md5"
"encoding/json"
"testing"
"github.com/hashicorp/terraform/state"
"github.com/hashicorp/terraform/states/statefile"
)
// testClient is a generic function to test any client.
func testClient(t *testing.T, c Client) {
var buf bytes.Buffer
s := state.TestStateInitial()
sf := &statefile.File{State: s}
if err := statefile.Write(sf, &buf); err != nil {
t.Fatalf("err: %s", err)
}
data := buf.Bytes()
if err := c.Put(data); err != nil {
t.Fatalf("put: %s", err)
}
p, err := c.Get()
if err != nil {
t.Fatalf("get: %s", err)
}
if !bytes.Equal(p.Data, data) {
t.Fatalf("bad: %#v", p)
}
if err := c.Delete(); err != nil {
t.Fatalf("delete: %s", err)
}
p, err = c.Get()
if err != nil {
t.Fatalf("get: %s", err)
}
if p != nil {
t.Fatalf("bad: %#v", p)
}
}
func TestRemoteClient_noPayload(t *testing.T) {
s := &State{
Client: nilClient{},
}
if err := s.RefreshState(); err != nil {
t.Fatal("error refreshing empty remote state")
}
}
// nilClient returns nil for everything
type nilClient struct{}
func (nilClient) Get() (*Payload, error) { return nil, nil }
func (c nilClient) Put([]byte) error { return nil }
func (c nilClient) Delete() error { return nil }
// mockClient is a client that tracks persisted state snapshots only in
// memory and also logs what it has been asked to do for use in test
// assertions.
type mockClient struct {
current []byte
log []mockClientRequest
force bool
}
type mockClientRequest struct {
Method string
Content map[string]interface{}
}
func (c *mockClient) Get() (*Payload, error) {
c.appendLog("Get", c.current)
if c.current == nil {
return nil, nil
}
checksum := md5.Sum(c.current)
return &Payload{
Data: c.current,
MD5: checksum[:],
}, nil
}
func (c *mockClient) Put(data []byte) error {
if c.force {
c.appendLog("Force Put", data)
} else {
c.appendLog("Put", data)
}
c.current = data
return nil
}
func (c *mockClient) Delete() error {
c.appendLog("Delete", c.current)
c.current = nil
return nil
}
// Implements remote.ClientForcePusher
func (c *mockClient) EnableForcePush() {
c.force = true
}
func (c *mockClient) appendLog(method string, content []byte) {
// For easier test assertions, we actually log the result of decoding
// the content JSON rather than the raw bytes. Callers are in principle
// allowed to provide any arbitrary bytes here, but we know we're only
// using this to test our own State implementation here and that always
// uses the JSON state format, so this is fine.
var contentVal map[string]interface{}
if content != nil {
err := json.Unmarshal(content, &contentVal)
if err != nil {
panic(err) // should never happen because our tests control this input
}
}
c.log = append(c.log, mockClientRequest{method, contentVal})
}