refactor: nettests is now an internal package (#165)

I'm moving everything into internal packages since this ain't a library.

While there, remove typo that was causing a build breakage.

internal/nettests/dash.go

@@ -0,0 +1,63 @@
+package nettests
+
+import (
+	"github.com/pkg/errors"
+)
+
+// Dash test implementation
+type Dash struct {
+}
+
+// Run starts the test
+func (d Dash) Run(ctl *Controller) error {
+	builder, err := ctl.Session.NewExperimentBuilder("dash")
+	if err != nil {
+		return err
+	}
+	return ctl.Run(builder, []string{""})
+}
+
+// DashTestKeys for the test
+// TODO: process 'receiver_data' to provide an array of performance for a chart.
+type DashTestKeys struct {
+	Latency   float64 `json:"connect_latency"`
+	Bitrate   float64 `json:"median_bitrate"`
+	Delay     float64 `json:"min_playout_delay"`
+	IsAnomaly bool    `json:"-"`
+}
+
+// GetTestKeys generates a summary for a test run
+func (d Dash) GetTestKeys(tk map[string]interface{}) (interface{}, error) {
+	var err error
+
+	testKeys := DashTestKeys{IsAnomaly: false}
+
+	simple, ok := tk["simple"].(map[string]interface{})
+	if !ok {
+		return testKeys, errors.New("simple key is not of the expected type")
+	}
+
+	latency, ok := simple["connect_latency"].(float64)
+	if !ok {
+		err = errors.Wrap(err, "connect_latency is invalid")
+	}
+	testKeys.Latency = latency
+
+	bitrate, ok := simple["median_bitrate"].(float64)
+	if !ok {
+		err = errors.Wrap(err, "median_bitrate is invalid")
+	}
+	testKeys.Bitrate = bitrate
+
+	delay, ok := simple["min_playout_delay"].(float64)
+	if !ok {
+		err = errors.Wrap(err, "min_playout_delay is invalid")
+	}
+	testKeys.Delay = delay
+	return testKeys, err
+}
+
+// LogSummary writes the summary to the standard output
+func (d Dash) LogSummary(s string) error {
+	return nil
+}