Add test for the NonEmptyStringValidator

And add phpunit.xml and add .phpunit.cache to .gitignore

Author: thofman

.gitignore

@@ -1,3 +1,3 @@
 .idea
-
+.phpunit.cache
 /vendor/

phpunit.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/13.0/phpunit.xsd"
+         cacheDirectory=".phpunit.cache"
+         beStrictAboutOutputDuringTests="true"
+         beStrictAboutTestsThatDoNotTestAnything="true"
+         displayDetailsOnAllIssues="true"
+         failOnPhpunitDeprecation="true"
+         failOnRisky="true"
+         failOnWarning="true"
+         colors="true">
+    <testsuites>
+        <testsuite name="unit">
+            <directory>tests/unit</directory>
+        </testsuite>
+    </testsuites>
+</phpunit>

src/Domain/Question/Validation/NonEmptyStringValidator.php

@@ -0,0 +1,12 @@
+<?php
+declare(strict_types=1);
+
+namespace thofman\KnowledgeBase\Domain\Question\Validation;
+
+final readonly class NonEmptyStringValidator implements Validator
+{
+    public function validate(string $value): ValidationResult
+    {
+        return ValidationResult::valid();
+    }
+}

src/Domain/Question/Validation/ValidationResult.php

@@ -0,0 +1,28 @@
+<?php
+declare(strict_types=1);
+
+namespace thofman\KnowledgeBase\Domain\Question\Validation;
+
+final readonly class ValidationResult
+{
+    public static function valid(): self
+    {
+        return new self(
+            isValid: true,
+        );
+    }
+
+    public static function invalid(string $validationErrorMessage): self
+    {
+        return new self(
+            isValid: false,
+            validationErrorMessage: $validationErrorMessage,
+        );
+    }
+
+    private function __construct(
+        public bool $isValid,
+        public string $validationErrorMessage = '',
+    ) {
+    }
+}

src/Domain/Question/Validation/Validator.php

@@ -0,0 +1,11 @@
+<?php
+declare(strict_types=1);
+
+namespace thofman\KnowledgeBase\Domain\Question\Validation;
+
+use Symfony\Component\Console\Question\Question;
+
+interface Validator
+{
+    public function validate(string $value): ValidationResult;
+}

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

@@ -0,0 +1,27 @@
+<?php
+declare(strict_types=1);
+
+namespace thofman\KnowledgeBase\tests\unit\Domain\Question\Validation;
+
+use Generator;
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\Attributes\Test;
+use PHPUnit\Framework\TestCase;
+use thofman\KnowledgeBase\Domain\Question\Validation\NonEmptyStringValidator;
+use thofman\KnowledgeBase\Domain\Question\Validation\ValidationResult;
+
+final class NonEmptyStringValidatorTest extends TestCase
+{
+    #[Test]
+    #[DataProvider('provideDataToTestTheNonEmptyStringValidator')]
+    public function theNonEmptyStringValidator(string $value, ValidationResult $expectedResult): void
+    {
+        $validator = new NonEmptyStringValidator();
+        self::assertEquals($expectedResult, $validator->validate($value));
+    }
+
+    public static function provideDataToTestTheNonEmptyStringValidator(): Generator
+    {
+        yield ['test', ValidationResult::valid()];
+    }
+}