// StartInstanceWithConstraintsAndNetworks is a test helper function that
// starts an instance with the given networks, and a plausible but invalid
// configuration, and returns the result of Environ.StartInstance.
func StartInstanceWithConstraintsAndNetworks(
env environs.Environ, machineId string, cons constraints.Value,
includeNetworks, excludeNetworks []string,
) (
instance.Instance, *instance.HardwareCharacteristics, []network.Info, error,
) {
series := config.PreferredSeries(env.Config())
agentVersion, ok := env.Config().AgentVersion()
if !ok {
return nil, nil, nil, fmt.Errorf("missing agent version in environment config")
}
possibleTools, err := tools.FindInstanceTools(env, agentVersion, series, cons.Arch)
if err != nil {
return nil, nil, nil, err
}
machineNonce := "fake_nonce"
stateInfo := FakeStateInfo(machineId)
apiInfo := FakeAPIInfo(machineId)
machineConfig := environs.NewMachineConfig(
machineId, machineNonce,
includeNetworks, excludeNetworks,
stateInfo, apiInfo)
return env.StartInstance(environs.StartInstanceParams{
Constraints: cons,
Tools: possibleTools,
MachineConfig: machineConfig,
})
}
func findInstanceTools(env environs.Environ, series, arch string) (*tools.Tools, error) {
agentVersion, ok := env.Config().AgentVersion()
if !ok {
return nil, fmt.Errorf("no agent version set in environment configuration")
}
possibleTools, err := envtools.FindInstanceTools(env, agentVersion, series, &arch)
if err != nil {
return nil, err
}
return possibleTools[0], nil
}