Add tests to Domain\Preference\PreferenceTypeEnum

tests/Unit/Domain/Preference/PreferenceTypeEnumTest.php

@@ -0,0 +1,25 @@
+<?php
+declare(strict_types = 1);
+
+namespace PackageHealth\PHP\Test\Unit\Domain\Preference;
+
+use PackageHealth\PHP\Domain\Preference\PreferenceTypeEnum;
+use PHPUnit\Framework\TestCase;
+
+final class PreferenceTypeEnumTest extends TestCase {
+  public function testIsStringValue(): void {
+    $this->assertSame('string', PreferenceTypeEnum::isString->value);
+  }
+
+  public function testIsIntegerValue(): void {
+    $this->assertSame('integer', PreferenceTypeEnum::isInteger->value);
+  }
+
+  public function testIsFloatValue(): void {
+    $this->assertSame('float', PreferenceTypeEnum::isFloat->value);
+  }
+
+  public function testIsBoolValue(): void {
+    $this->assertSame('bool', PreferenceTypeEnum::isBool->value);
+  }
+}