fix: keep unknown properties from predefinedProperties

lib/run-questionnaire.js

@@ -86,7 +86,7 @@ async function run(questions, {
     await ask(questions[i]);
   }
 
-  return [properties, pickedFeatures, notDefaultFeatures];
+  return [{...predefinedProperties, ...properties}, pickedFeatures, notDefaultFeatures];
 }
 
 async function textPrompt(question, {predefinedProperties, unattended, _debug}) {

test/run-questionnaire.spec.js

@@ -237,6 +237,19 @@ test('run runs through questionnaire in unattended mode with preselectedFeatures
   ]);
 });
 
+test('run runs through questionnaire in unattended mode with preselectedFeatures and predefinedProperties, and keeps unknown properties', async t => {
+  const result = await run(questions, {
+    unattended: true,
+    preselectedFeatures: ['postcss'],
+    predefinedProperties: {name: 'new-app', foo: 'bar'}
+  });
+  t.deepEqual(result, [
+    {name: 'new-app', description: '', foo: 'bar'},
+    ['webpack', 'postcss'],
+    ['postcss']
+  ]);
+});
+
 test('run runs through questionnaire', async t => {
   let result = await run(questions, {_debug: ['new-app', 2, [1, 2]]});
   t.deepEqual(result, [
@@ -265,6 +278,19 @@ test('run runs through questionnaire with preselectedFeatures and predefinedProp
   ]);
 });
 
+test('run runs through questionnaire with preselectedFeatures and predefinedProperties, and keeps unknown properties', async t => {
+  const result = await run(questions, {
+    preselectedFeatures: ['postcss'],
+    predefinedProperties: {name: 'new-app', foo: 'bar'},
+    _debug: [2]
+  });
+  t.deepEqual(result, [
+    {name: 'new-app', foo: 'bar'},
+    ['dumber', 'postcss'],
+    ['dumber', 'postcss']
+  ]);
+});
+
 test('run rejects missing name/choices', async t => {
   await t.throwsAsync(async () => run([{}], {}));
 });
@@ -289,4 +315,4 @@ test('run rejects multi-select with missing value', async t => {
       {value: 'sass', selected: true}
     ]
   }], {}));
-});
+});