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local_test.go
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local_test.go
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package nova_test
import (
"bytes"
"fmt"
. "launchpad.net/gocheck"
"launchpad.net/goose/client"
"launchpad.net/goose/errors"
goosehttp "launchpad.net/goose/http"
"launchpad.net/goose/identity"
"launchpad.net/goose/nova"
"launchpad.net/goose/testservices"
"launchpad.net/goose/testservices/openstackservice"
"log"
"net/http"
"net/http/httptest"
"strings"
)
func registerLocalTests() {
Suite(&localLiveSuite{})
}
// localLiveSuite runs tests from LiveTests using a fake
// nova server that runs within the test process itself.
type localLiveSuite struct {
LiveTests
// The following attributes are for using testing doubles.
Server *httptest.Server
Mux *http.ServeMux
oldHandler http.Handler
openstack *openstackservice.Openstack
retryErrorCount int // The current retry error count.
retryErrorCountToSend int // The number of retry errors to send.
noMoreIPs bool // If true, addFloatingIP will return ErrNoMoreFloatingIPs
ipLimitExceeded bool // If true, addFloatingIP will return ErrIPLimitExceeded
}
func (s *localLiveSuite) SetUpSuite(c *C) {
c.Logf("Using identity and nova service test doubles")
// Set up the HTTP server.
s.Server = httptest.NewServer(nil)
s.oldHandler = s.Server.Config.Handler
s.Mux = http.NewServeMux()
s.Server.Config.Handler = s.Mux
// Set up an Openstack service.
s.cred = &identity.Credentials{
URL: s.Server.URL,
User: "fred",
Secrets: "secret",
Region: "some region",
TenantName: "tenant",
}
s.openstack = openstackservice.New(s.cred)
s.openstack.SetupHTTP(s.Mux)
s.LiveTests.SetUpSuite(c)
}
func (s *localLiveSuite) TearDownSuite(c *C) {
s.LiveTests.TearDownSuite(c)
s.Mux = nil
s.Server.Config.Handler = s.oldHandler
s.Server.Close()
}
func (s *localLiveSuite) SetUpTest(c *C) {
s.retryErrorCount = 0
s.LiveTests.SetUpTest(c)
}
func (s *localLiveSuite) TearDownTest(c *C) {
s.LiveTests.TearDownTest(c)
}
// Additional tests to be run against the service double only go here.
func (s *localLiveSuite) retryLimitHook(sc testservices.ServiceControl) testservices.ControlProcessor {
return func(sc testservices.ServiceControl, args ...interface{}) error {
sendError := s.retryErrorCount < s.retryErrorCountToSend
if sendError {
s.retryErrorCount++
return &testservices.RateLimitExceededError{fmt.Errorf("retry limit exceeded")}
}
return nil
}
}
func (s *localLiveSuite) setupClient(c *C, logger *log.Logger) *nova.Client {
client := client.NewClient(s.cred, identity.AuthUserPass, logger)
return nova.New(client)
}
func (s *localLiveSuite) setupRetryErrorTest(c *C, logger *log.Logger) (*nova.Client, *nova.SecurityGroup) {
nova := s.setupClient(c, logger)
// Delete the artifact if it already exists.
testGroup, err := nova.SecurityGroupByName("test_group")
if err != nil {
c.Assert(errors.IsNotFound(err), Equals, true)
} else {
nova.DeleteSecurityGroup(testGroup.Id)
c.Assert(err, IsNil)
}
testGroup, err = nova.CreateSecurityGroup("test_group", "test")
c.Assert(err, IsNil)
return nova, testGroup
}
// TestRateLimitRetry checks that when we make too many requests and receive a Retry-After response, the retry
// occurs and the request ultimately succeeds.
func (s *localLiveSuite) TestRateLimitRetry(c *C) {
// Capture the logged output so we can check for retry messages.
var logout bytes.Buffer
logger := log.New(&logout, "", log.LstdFlags)
nova, testGroup := s.setupRetryErrorTest(c, logger)
s.retryErrorCountToSend = goosehttp.MaxSendAttempts - 1
s.openstack.Nova.RegisterControlPoint("removeSecurityGroup", s.retryLimitHook(s.openstack.Nova))
defer s.openstack.Nova.RegisterControlPoint("removeSecurityGroup", nil)
err := nova.DeleteSecurityGroup(testGroup.Id)
c.Assert(err, IsNil)
// Ensure we got at least one retry message.
output := logout.String()
c.Assert(strings.Contains(output, "Too many requests, retrying in"), Equals, true)
}
// TestRateLimitRetryExceeded checks that an error is raised if too many retry responses are received from the server.
func (s *localLiveSuite) TestRateLimitRetryExceeded(c *C) {
nova, testGroup := s.setupRetryErrorTest(c, nil)
s.retryErrorCountToSend = goosehttp.MaxSendAttempts
s.openstack.Nova.RegisterControlPoint("removeSecurityGroup", s.retryLimitHook(s.openstack.Nova))
defer s.openstack.Nova.RegisterControlPoint("removeSecurityGroup", nil)
err := nova.DeleteSecurityGroup(testGroup.Id)
c.Assert(err, Not(IsNil))
c.Assert(err.Error(), Matches, ".*Maximum number of attempts.*")
}
func (s *localLiveSuite) addFloatingIPHook(sc testservices.ServiceControl) testservices.ControlProcessor {
return func(sc testservices.ServiceControl, args ...interface{}) error {
if s.noMoreIPs {
return testservices.NoMoreFloatingIPs
} else if s.ipLimitExceeded {
return testservices.IPLimitExceeded
}
return nil
}
}
func (s *localLiveSuite) TestAddFloatingIPErrors(c *C) {
nova := s.setupClient(c, nil)
fips, err := nova.ListFloatingIPs()
c.Assert(err, IsNil)
c.Assert(fips, HasLen, 0)
s.openstack.Nova.RegisterControlPoint("addFloatingIP", s.addFloatingIPHook(s.openstack.Nova))
defer s.openstack.Nova.RegisterControlPoint("addFloatingIP", nil)
s.noMoreIPs = true
fip, err := nova.AllocateFloatingIP()
c.Assert(err, ErrorMatches, ".*Zero floating ips available.*")
c.Assert(fip, IsNil)
s.noMoreIPs = false
s.ipLimitExceeded = true
fip, err = nova.AllocateFloatingIP()
c.Assert(err, ErrorMatches, ".*Maximum number of floating ips exceeded.*")
c.Assert(fip, IsNil)
s.ipLimitExceeded = false
fip, err = nova.AllocateFloatingIP()
c.Assert(err, IsNil)
c.Assert(fip.IP, Not(Equals), "")
}