refactor: move code to run group in nettests package (#182)

Part of https://github.com/ooni/probe/issues/1289

internal/nettests/run.go

@@ -0,0 +1,82 @@
+package nettests
+
+import (
+	"github.com/apex/log"
+	"github.com/ooni/probe-cli/internal/database"
+	"github.com/ooni/probe-cli/internal/ooni"
+	"github.com/pkg/errors"
+)
+
+// RunGroupConfig contains the settings for running a nettest group.
+type RunGroupConfig struct {
+	GroupName  string
+	Probe      *ooni.Probe
+	InputFiles []string
+	Inputs     []string
+}
+
+// RunGroup runs a group of nettests according to the specified config.
+func RunGroup(config RunGroupConfig) error {
+	if config.Probe.IsTerminated() == true {
+		log.Debugf("context is terminated, stopping runNettestGroup early")
+		return nil
+	}
+
+	sess, err := config.Probe.NewSession()
+	if err != nil {
+		log.WithError(err).Error("Failed to create a measurement session")
+		return err
+	}
+	defer sess.Close()
+
+	err = sess.MaybeLookupLocation()
+	if err != nil {
+		log.WithError(err).Error("Failed to lookup the location of the probe")
+		return err
+	}
+	network, err := database.CreateNetwork(config.Probe.DB(), sess)
+	if err != nil {
+		log.WithError(err).Error("Failed to create the network row")
+		return err
+	}
+	if err := sess.MaybeLookupBackends(); err != nil {
+		log.WithError(err).Warn("Failed to discover OONI backends")
+		return err
+	}
+
+	group, ok := NettestGroups[config.GroupName]
+	if !ok {
+		log.Errorf("No test group named %s", config.GroupName)
+		return errors.New("invalid test group name")
+	}
+	log.Debugf("Running test group %s", group.Label)
+
+	result, err := database.CreateResult(
+		config.Probe.DB(), config.Probe.Home(), config.GroupName, network.ID)
+	if err != nil {
+		log.Errorf("DB result error: %s", err)
+		return err
+	}
+
+	config.Probe.ListenForSignals()
+	config.Probe.MaybeListenForStdinClosed()
+	for i, nt := range group.Nettests {
+		if config.Probe.IsTerminated() == true {
+			log.Debugf("context is terminated, stopping group.Nettests early")
+			break
+		}
+		log.Debugf("Running test %T", nt)
+		ctl := NewController(nt, config.Probe, result, sess)
+		ctl.InputFiles = config.InputFiles
+		ctl.Inputs = config.Inputs
+		ctl.SetNettestIndex(i, len(group.Nettests))
+		if err = nt.Run(ctl); err != nil {
+			log.WithError(err).Errorf("Failed to run %s", group.Label)
+		}
+	}
+
+	if err = result.Finished(config.Probe.DB()); err != nil {
+		return err
+	}
+	return nil
+}