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