Fix phpstan, add more phpunit test

tests/SPC/builder/BuilderProviderTest.php

@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SPC\Tests\builder;
+
+use PHPUnit\Framework\TestCase;
+use SPC\builder\BuilderBase;
+use SPC\builder\BuilderProvider;
+use Symfony\Component\Console\Input\ArgvInput;
+
+/**
+ * @internal
+ */
+class BuilderProviderTest extends TestCase
+{
+    public static function setUpBeforeClass(): void
+    {
+        BuilderProvider::makeBuilderByInput(new ArgvInput());
+        BuilderProvider::getBuilder();
+    }
+
+    public function testMakeBuilderByInput(): void
+    {
+        $this->assertInstanceOf(BuilderBase::class, BuilderProvider::makeBuilderByInput(new ArgvInput()));
+        $this->assertInstanceOf(BuilderBase::class, BuilderProvider::getBuilder());
+    }
+}