Bump test coverage for diff and folder VOs

Author: afilina

src/Value/Diff.php

@@ -3,13 +3,18 @@
 
 namespace App\Value;
 
+use Assert\Assert;
+
 class Diff
 {
     private string $before;
     private string $after;
 
     public function __construct(string $before, string $after)
     {
+        Assert::thatAll([$before, $after])
+            ->notBlank();
+
         $this->before = $before;
         $this->after = $after;
     }

tests/Value/DiffTest.php

@@ -0,0 +1,48 @@
+<?php
+declare(strict_types=1);
+
+namespace App\Tests\Value;
+
+use App\Value\Diff;
+use InvalidArgumentException;
+use PHPUnit\Framework\TestCase;
+
+/** @covers \App\Value\Diff */
+class DiffTest extends TestCase
+{
+    const BEFORE = 'a();';
+    const AFTER = 'b();';
+
+    /** @test */
+    public function constructor_WithEmptyValues_ThrowException()
+    {
+        $this->expectException(InvalidArgumentException::class);
+        new Diff('', '');
+    }
+
+    /** @test */
+    public function getBefore()
+    {
+        self::assertEquals(
+            self::BEFORE,
+            $this->createValidDiff()->getBefore(),
+        );
+    }
+
+    /** @test */
+    public function getAfter()
+    {
+        self::assertEquals(
+            self::AFTER,
+            $this->createValidDiff()->getAfter(),
+        );
+    }
+
+    /**
+     * @return Diff
+     */
+    private function createValidDiff(): Diff
+    {
+        return new Diff(self::BEFORE, self::AFTER);
+    }
+}

tests/Value/FolderTest.php

@@ -0,0 +1,38 @@
+<?php
+declare(strict_types=1);
+
+namespace App\Tests\Value;
+
+use App\Value\Folder;
+use InvalidArgumentException;
+use PHPUnit\Framework\TestCase;
+
+/** @covers \App\Value\Folder */
+class FolderTest extends TestCase
+{
+    const PATH = 'path/to/folder/';
+
+    /** @test */
+    public function constructor_WithMissingBackslash_ThrowException()
+    {
+        $this->expectException(InvalidArgumentException::class);
+        new Folder('path/to/folder');
+    }
+
+    /** @test */
+    public function getPath()
+    {
+        self::assertEquals(
+            self::PATH,
+            (string)$this->createValidFolder()
+        );
+    }
+
+    /**
+     * @return Folder
+     */
+    private function createValidFolder(): Folder
+    {
+        return new Folder(self::PATH);
+    }
+}