[issue-41] heroku app name for app name with spaces

when parse app name has spaces, the heroku app name we create should
remove such spaces before creating the corresponding heroku app name

Author: pavanka

herokucmd/add.go

@@ -43,9 +43,15 @@ func selectHerokuApp(apps nameIDs, e *parsecli.Env) (*nameID, error) {
 
 func getRandomAppName(app *parsecli.App) string {
 	rand.Seed(time.Now().Unix())
+
+	namePrefix := strings.Join(strings.Fields(strings.ToLower(app.Name)), "")
+	if namePrefix == "" {
+		namePrefix = "parsoku"
+	}
+
 	construct := fmt.Sprintf(
 		"%s-%s-%d",
-		strings.ToLower(app.Name),
+		namePrefix,
 		strings.ToLower(app.ApplicationID[:6]),
 		rand.Intn(10000),
 	)

herokucmd/add_test.go

@@ -0,0 +1,14 @@
+package herokucmd
+
+import (
+	"testing"
+
+	"github.com/ParsePlatform/parse-cli/parsecli"
+	"github.com/facebookgo/ensure"
+)
+
+func TestGetRandomAppName(t *testing.T) {
+	app := &parsecli.App{Name: "test app", ApplicationID: "123456789"}
+	name := getRandomAppName(app)
+	ensure.StringContains(t, name, "testapp")
+}