fix(inject): treat undefined in inject as initial value (#266)

fix #265

Author: rluvaton

lib/index.js

@@ -65,7 +65,7 @@ async function prompt(questions=[], { onSubmit=noop, onCancel=noop }={}) {
 
     try {
       // Get the injected answer if there is one or prompt the user
-      answer = prompt._injected ? getInjectedAnswer(prompt._injected) : await prompts[type](question);
+      answer = prompt._injected ? getInjectedAnswer(prompt._injected, question.initial) : await prompts[type](question);
       answers[name] = answer = await getFormattedAnswer(question, answer, true);
       quit = await onSubmit(question, answer, answers);
     } catch (err) {
@@ -78,13 +78,13 @@ async function prompt(questions=[], { onSubmit=noop, onCancel=noop }={}) {
   return answers;
 }
 
-function getInjectedAnswer(injected) {
+function getInjectedAnswer(injected, deafultValue) {
   const answer = injected.shift();
     if (answer instanceof Error) {
       throw answer;
     }
 
-    return answer;
+    return (answer === undefined) ? deafultValue : answer;
 }
 
 function inject(answers) {