Add a few test cases to NonEmptyStringValidator

Author: thofman

src/Domain/Question/Validation/NonEmptyStringValidator.php

@@ -7,6 +7,10 @@
 {
     public function validate(string $value): ValidationResult
     {
+        if (trim($value) === '') {
+            return ValidationResult::invalid('The value cannot be empty');
+        }
+
         return ValidationResult::valid();
     }
 }

tests/unit/Domain/Question/Validation/NonEmptyStringValidatorTest.php

@@ -23,5 +23,8 @@ public function theNonEmptyStringValidator(string $value, ValidationResult $expe
     public static function provideDataToTestTheNonEmptyStringValidator(): Generator
     {
         yield ['test', ValidationResult::valid()];
+        yield [' test ', ValidationResult::valid()];
+        yield ['', ValidationResult::invalid('The value cannot be empty')];
+        yield [' ', ValidationResult::invalid('The value cannot be empty')];
     }
 }