minor symfony#58783 [Console] skip autocomplete test when stty is not available (xabbuh)

This PR was merged into the 5.4 branch.

Discussion
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[Console] skip autocomplete test when stty is not available

| Q             | A
| ------------- | ---
| Branch?       | 5.4
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Issues        |
| License       | MIT

Commits
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86795d4 skip autocomplete test when stty is not available

Author: nicolas-grekas

src/Symfony/Component/Console/Tests/Helper/QuestionHelperTest.php

@@ -914,6 +914,10 @@ public function testTraversableMultiselectAutocomplete()
 
     public function testAutocompleteMoveCursorBackwards()
     {
+        if (!Terminal::hasSttyAvailable()) {
+            $this->markTestSkipped('`stty` is required to test autocomplete functionality');
+        }
+
         // F<TAB><BACKSPACE><BACKSPACE><BACKSPACE>
         $inputStream = $this->getInputStream("F\t\177\177\177");