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// Copyright 2013 Canonical Ltd. This software is licensed under the
// GNU Lesser General Public License version 3 (see the file COPYING).
package gwacl
import (
"encoding/xml"
"fmt"
. "launchpad.net/gocheck"
"launchpad.net/gwacl/dedent"
"net/http"
"time"
)
type pollerSuite struct{}
var _ = Suite(&pollerSuite{})
func (suite *pollerSuite) makeAPI(c *C) *ManagementAPI {
subscriptionId := "subscriptionId"
subscriptionId = subscriptionId
api, err := NewManagementAPI(subscriptionId, "", "West US")
c.Assert(err, IsNil)
return api
}
// testPoller is a struct which implements the Poller interface. It records
// the number of calls to testPoller.Poll().
type testPoller struct {
recordedPollCalls int
notDoneCalls int
errorCalls int
}
var testPollerResponse = x509Response{}
var testPollerError = fmt.Errorf("Test error")
// newTestPoller return a pointer to a testPoller object that will return
// false when IsDone() will be called 'notDoneCalls' number of times and that
// will error when Poll() will be called 'errorCalls' number of times.
func newTestPoller(notDoneCalls int, errorCalls int) *testPoller {
return &testPoller{0, notDoneCalls, errorCalls}
}
func (poller *testPoller) poll() (*x509Response, error) {
if poller.errorCalls > 0 {
poller.errorCalls -= 1
return nil, testPollerError
}
poller.recordedPollCalls += 1
return &testPollerResponse, nil
}
func (poller *testPoller) isDone(response *x509Response, pollerError error) (bool, error) {
if pollerError != nil {
return true, pollerError
}
if poller.notDoneCalls == 0 {
return true, nil
}
poller.notDoneCalls = poller.notDoneCalls - 1
return false, nil
}
func (suite *pollerSuite) TestperformPollingPollsOnceImmediately(c *C) {
poller := newTestPoller(0, 0)
interval := time.Second * 10
start := time.Now()
response, err := performPolling(poller, interval, interval*2)
c.Assert(err, Equals, nil)
c.Assert(time.Since(start) < interval, Equals, true)
c.Assert(response, DeepEquals, &testPollerResponse)
}
func (suite *pollerSuite) TestperformPollingReturnsError(c *C) {
poller := newTestPoller(0, 1)
response, err := performPolling(poller, time.Nanosecond, time.Minute)
c.Assert(err, Equals, testPollerError)
c.Assert(response, IsNil)
}
func (suite *pollerSuite) TestperformPollingTimesout(c *C) {
poller := newTestPoller(10, 0)
response, err := performPolling(poller, time.Millisecond, 5*time.Millisecond)
c.Assert(response, IsNil)
c.Check(err, ErrorMatches, ".*polling timed out waiting for an asynchronous operation.*")
}
func (suite *pollerSuite) TestperformPollingRetries(c *C) {
poller := newTestPoller(2, 0)
response, err := performPolling(poller, time.Nanosecond, time.Minute)
c.Assert(err, IsNil)
c.Assert(response, DeepEquals, &testPollerResponse)
// Poll() has been called 3 times: two calls for which IsDone() returned
// false and one for which IsDone() return true.
c.Assert(poller.recordedPollCalls, Equals, 3)
}
func (suite *pollerSuite) TestnewOperationPoller(c *C) {
api := suite.makeAPI(c)
operationID := "operationID"
poller := newOperationPoller(api, operationID)
operationPollerInstance := poller.(operationPoller)
c.Check(operationPollerInstance.api, Equals, api)
c.Check(operationPollerInstance.operationID, Equals, operationID)
}
func (suite *pollerSuite) TestOperationPollerPoll(c *C) {
api := suite.makeAPI(c)
operationID := "operationID"
poller := newOperationPoller(api, operationID)
recordedRequests := setUpDispatcher("operationID")
_, err := poller.poll()
c.Assert(err, IsNil)
expectedURL := defaultManagement + api.session.subscriptionId + "/operations/" + operationID
checkOneRequest(c, recordedRequests, expectedURL, "2009-10-01", nil, "GET")
}
var operationXMLTemplate = dedent.Dedent(`
<?xml version="1.0" encoding="utf-8"?>
<Operation xmlns="http://schemas.microsoft.com/windowsazure">
<ID>bogus-request-id</ID>
<Status>%s</Status>
</Operation>
`)
func (suite *pollerSuite) TestOperationPollerIsDoneReturnsTrueIfOperationDone(c *C) {
poller := newOperationPoller(suite.makeAPI(c), "operationID")
operationStatuses := []string{"Succeeded", "Failed"}
for _, operationStatus := range operationStatuses {
body := fmt.Sprintf(operationXMLTemplate, operationStatus)
response := x509Response{
Body: []byte(body),
StatusCode: http.StatusOK,
}
isDone, err := poller.isDone(&response, nil)
c.Assert(err, IsNil)
c.Assert(isDone, Equals, true)
}
}
func (suite *pollerSuite) TestOperationPollerIsDoneReturnsFalse(c *C) {
poller := newOperationPoller(suite.makeAPI(c), "operationID")
notDoneResponses := []x509Response{
// 'InProgress' response.
{
Body: []byte(fmt.Sprintf(operationXMLTemplate, "InProgress")),
StatusCode: http.StatusOK,
},
// Error statuses.
{StatusCode: http.StatusNotFound},
{StatusCode: http.StatusBadRequest},
{StatusCode: http.StatusInternalServerError},
}
for _, response := range notDoneResponses {
isDone, _ := poller.isDone(&response, nil)
c.Assert(isDone, Equals, false)
}
}
func (suite *pollerSuite) TestOperationPollerIsDoneReturnsXMLParsingError(c *C) {
poller := newOperationPoller(suite.makeAPI(c), "operationID")
// Invalid XML content.
response := x509Response{
Body: []byte("><invalid XML"),
StatusCode: http.StatusOK,
}
_, err := poller.isDone(&response, nil)
c.Assert(err, NotNil)
c.Check(err, FitsTypeOf, new(xml.SyntaxError))
}
func (suite *pollerSuite) TestStartOperationPollingRetries(c *C) {
// This is an end-to-end test of the operation poller; there is a certain
// amount of duplication with the unit tests for performPolling() but
// it's probably worth it to thoroughly test performOperationPolling().
// Fake 2 responses in sequence: a 'InProgress' response and then a
// 'Succeeded' response.
firstResponse := DispatcherResponse{
response: &x509Response{
Body: []byte(fmt.Sprintf(operationXMLTemplate, "InProgress")),
StatusCode: http.StatusOK,
},
errorObject: nil}
secondResponse := DispatcherResponse{
response: &x509Response{
Body: []byte(fmt.Sprintf(operationXMLTemplate, "Succeeded")),
StatusCode: http.StatusOK,
},
errorObject: nil}
responses := []DispatcherResponse{firstResponse, secondResponse}
rigPreparedResponseDispatcher(responses)
recordedRequests := make([]*X509Request, 0)
rigRecordingDispatcher(&recordedRequests)
// Setup poller and start it.
operationID := "operationID"
poller := newOperationPoller(suite.makeAPI(c), operationID)
response, err := performPolling(poller, time.Nanosecond, time.Minute)
c.Assert(err, IsNil)
c.Assert(response, DeepEquals, secondResponse.response)
operationPollerInstance := poller.(operationPoller)
expectedURL := defaultManagement + operationPollerInstance.api.session.subscriptionId + "/operations/" + operationID
c.Assert(len(recordedRequests), Equals, 2)
checkRequest(c, recordedRequests[0], expectedURL, "2009-10-01", nil, "GET")
checkRequest(c, recordedRequests[1], expectedURL, "2009-10-01", nil, "GET")
}
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