[mqtt] Implements mqtt publish tooling

mode/mode.go

@@ -0,0 +1,37 @@
+package mode
+
+import (
+	"log"
+)
+
+type DriveMode int
+
+const (
+	DriveModeInvalid = -1
+	DriveModeUser    = iota
+	DriveModePilot
+)
+
+func ToString(mode DriveMode) string {
+	switch mode {
+	case DriveModeUser:
+		return "user"
+	case DriveModePilot:
+		return "pilot"
+	default:
+		return ""
+	}
+}
+
+func ParseString(val string) DriveMode {
+	switch val {
+	case "user":
+		return DriveModeUser
+	case "pilot":
+		return DriveModePilot
+	default:
+		log.Printf("invalid DriveMode: %v", val)
+		return DriveModeInvalid
+
+	}
+}

mode/mode_test.go

@@ -0,0 +1,40 @@
+package mode
+
+import "testing"
+
+func TestToString(t *testing.T) {
+	cases := []struct{
+		value DriveMode
+		expected string
+	}{
+		{DriveModeUser, "user"},
+		{DriveModePilot, "pilot"},
+		{DriveModeInvalid, ""},
+	}
+
+	for _, c := range cases{
+		val := ToString(c.value)
+		if val != c.expected{
+			t.Errorf("ToString(%v): %v, wants %v", c.value, val, c.expected)
+		}
+	}
+}
+
+func TestParseString(t *testing.T) {
+	cases := []struct{
+		value string
+		expected DriveMode
+	}{
+		{"user", DriveModeUser},
+		{"pilot",DriveModePilot},
+		{"", DriveModeInvalid},
+		{"invalid", DriveModeInvalid},
+	}
+
+	for _, c := range cases{
+		val := ParseString(c.value)
+		if val != c.expected{
+			t.Errorf("ParseString(%v): %v, wants %v", c.value, val, c.expected)
+		}
+	}
+}