tests: Add more tests for the compactors serializability

fixtures/Compactor/FakeCompactor.php

@@ -22,4 +22,14 @@ public function compact(string $file, string $contents): string
     {
         throw UnsupportedMethodCall::forMethod(__CLASS__, __METHOD__);
     }
+
+    public static function unserialize(string $serializedCompactor): static
+    {
+        throw UnsupportedMethodCall::forMethod(__CLASS__, __METHOD__);
+    }
+
+    public function serialize(): string
+    {
+        throw UnsupportedMethodCall::forMethod(__CLASS__, __METHOD__);
+    }
 }

src/Compactor/NullCompactor.php

@@ -0,0 +1,41 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the box project.
+ *
+ * (c) Kevin Herrera <[email protected]>
+ *     Théo Fidry <[email protected]>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+namespace KevinGH\Box\Compactor;
+
+use function serialize;
+use function unserialize;
+
+/**
+ * Base compactor class providing a slightly simpler API to compact the content only if the file is supported.
+ *
+ * @private
+ */
+final class NullCompactor implements Compactor
+{
+    public function compact(string $file, string $contents): string
+    {
+        return $contents;
+    }
+
+    public function serialize(): string
+    {
+        return serialize($this);
+    }
+
+    public static function unserialize(string $serializedCompactor): static
+    {
+        return unserialize($serializedCompactor, ['allowed_classes' => [self::class]]);
+    }
+}

tests/Compactor/CompactorTestCase.php

@@ -0,0 +1,37 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the box project.
+ *
+ * (c) Kevin Herrera <[email protected]>
+ *     Théo Fidry <[email protected]>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+namespace KevinGH\Box\Compactor;
+
+use PHPUnit\Framework\TestCase;
+use function serialize;
+use function unserialize;
+
+abstract class CompactorTestCase extends TestCase
+{
+    /**
+     * @dataProvider compactorProvider
+     */
+    public function test_it_is_serializable(Compactor $compactor): void
+    {
+        $unserializedCompactor = unserialize(serialize($compactor));
+
+        self::assertEquals(
+            $compactor,
+            $unserializedCompactor,
+        );
+    }
+
+    abstract public static function compactorProvider(): iterable;
+}

tests/Compactor/CompactorsTest.php

@@ -22,6 +22,8 @@
 use Prophecy\PhpUnit\ProphecyTrait;
 use Prophecy\Prophecy\ObjectProphecy;
 use Prophecy\Prophet;
+use function serialize;
+use function unserialize;
 
 /**
  * @covers \KevinGH\Box\Compactor\Compactors
@@ -205,6 +207,34 @@ public static function compactorsForFirstSymbolsRegistryChangeProvider(): iterab
         ];
     }
 
+    /**
+     * @dataProvider compactorsProvider
+     */
+    public function test_it_can_be_serialized_and_deserialized(Compactors $compactors): void
+    {
+        $unserializedCompactors = unserialize(serialize($compactors));
+
+        self::assertEquals(
+            $compactors,
+            $unserializedCompactors,
+        );
+    }
+
+    public static function compactorsProvider(): iterable
+    {
+        yield 'empty compactor' => [
+            new Compactors(),
+        ];
+
+        yield 'compactor with PHP-Scoper' => [
+            new Compactors(
+                self::createScoperCompactor(
+                    new SymbolsRegistry(),
+                ),
+            ),
+        ];
+    }
+
     private static function createScoperCompactor(SymbolsRegistry $symbolsRegistry): PhpScoper
     {
         return new PhpScoper(new NullScoper($symbolsRegistry));

tests/Compactor/JsonTest.php

@@ -14,16 +14,12 @@
 
 namespace KevinGH\Box\Compactor;
 
-use PHPUnit\Framework\TestCase;
-use function serialize;
-use function unserialize;
-
 /**
  * @covers \KevinGH\Box\Compactor\Json
  *
  * @internal
  */
-class JsonTest extends TestCase
+class JsonTest extends CompactorTestCase
 {
     private Compactor $compactor;
 
@@ -72,12 +68,9 @@ public function test_it_compacts__composer_lock_files(string $content, string $e
         self::assertSame($expected, $actual);
     }
 
-    public function test_it_is_serializable(): void
+    public static function compactorProvider(): iterable
     {
-        self::assertEquals(
-            $this->compactor,
-            unserialize(serialize($this->compactor)),
-        );
+        yield [new Json()];
     }
 
     public static function filesProvider(): iterable

tests/Compactor/PhpScoperTest.php

@@ -17,19 +17,16 @@
 use Error;
 use KevinGH\Box\PhpScoper\FakeScoper;
 use KevinGH\Box\PhpScoper\Scoper;
-use PHPUnit\Framework\TestCase;
 use Prophecy\Argument;
 use Prophecy\PhpUnit\ProphecyTrait;
 use Prophecy\Prophecy\ObjectProphecy;
-use function serialize;
-use function unserialize;
 
 /**
  * @covers \KevinGH\Box\Compactor\PhpScoper
  *
  * @internal
  */
-class PhpScoperTest extends TestCase
+class PhpScoperTest extends CompactorTestCase
 {
     use ProphecyTrait;
 
@@ -86,13 +83,10 @@ public function test_it_exposes_the_scoper(): void
         self::assertSame($scoper, $compactor->getScoper());
     }
 
-    public function test_it_is_serializable(): void
+    public static function compactorProvider(): iterable
     {
-        $compactor = new PhpScoper(new FakeScoper());
-
-        self::assertEquals(
-            $compactor,
-            unserialize(serialize($compactor)),
-        );
+        yield [
+            new PhpScoper(new FakeScoper()),
+        ];
     }
 }

tests/Compactor/PhpTest.php

@@ -18,14 +18,13 @@
 use KevinGH\Box\Annotation\CompactedFormatter;
 use KevinGH\Box\Annotation\DocblockAnnotationParser;
 use phpDocumentor\Reflection\DocBlockFactory;
-use PHPUnit\Framework\TestCase;
 
 /**
  * @covers \KevinGH\Box\Compactor\Php
  *
  * @internal
  */
-class PhpTest extends TestCase
+class PhpTest extends CompactorTestCase
 {
     /**
      * @dataProvider filesProvider
@@ -72,20 +71,27 @@ public function test_it_compacts_php_files(
         self::assertSame($expected, $actual);
     }
 
-    public function test_it_is_serializable(): void
+    public static function compactorProvider(): iterable
     {
-        $compactor = new Php(
-            new DocblockAnnotationParser(
-                DocBlockFactory::createInstance(),
-                new CompactedFormatter(),
-                [],
+        yield 'empty' => [
+            new Php(
+                new DocblockAnnotationParser(
+                    DocBlockFactory::createInstance(),
+                    new CompactedFormatter(),
+                    [],
+                ),
             ),
-        );
+        ];
 
-        self::assertEquals(
-            $compactor,
-            unserialize(serialize($compactor)),
-        );
+        yield 'nominal' => [
+            new Php(
+                new DocblockAnnotationParser(
+                    DocBlockFactory::createInstance(),
+                    new CompactedFormatter(),
+                    ['@author'],
+                ),
+            ),
+        ];
     }
 
     public static function filesProvider(): iterable

tests/Compactor/PlaceholderTest.php

@@ -14,14 +14,12 @@
 
 namespace KevinGH\Box\Compactor;
 
-use PHPUnit\Framework\TestCase;
-
 /**
  * @covers \KevinGH\Box\Compactor\Placeholder
  *
  * @internal
  */
-class PlaceholderTest extends TestCase
+class PlaceholderTest extends CompactorTestCase
 {
     /**
      * @dataProvider filesContentsProvider
@@ -33,14 +31,15 @@ public function test_it_replaces_the_placeholders(array $placeholders, string $c
         self::assertSame($expected, $actual);
     }
 
-    public function test_it_is_serializable(): void
+    public static function compactorProvider(): iterable
     {
-        $compactor = new Placeholder([]);
+        yield 'empty' => [
+            new Placeholder([]),
+        ];
 
-        self::assertEquals(
-            $compactor,
-            unserialize(serialize($compactor)),
-        );
+        yield 'nominal' => [
+            new Placeholder(['@foo@' => 'bar']),
+        ];
     }
 
     public static function filesContentsProvider(): iterable

tests/Configuration/ConfigurationTest.php

@@ -18,8 +18,8 @@
 use DateTimeInterface;
 use Fidry\FileSystem\FS;
 use InvalidArgumentException;
-use KevinGH\Box\Compactor\DummyCompactor;
 use KevinGH\Box\Compactor\InvalidCompactor;
+use KevinGH\Box\Compactor\NullCompactor;
 use KevinGH\Box\Compactor\Php;
 use KevinGH\Box\Compactor\PhpScoper;
 use KevinGH\Box\Json\JsonValidationException;
@@ -565,14 +565,14 @@ public function test_configure_the_compactors(): void
             'files' => [self::DEFAULT_FILE],
             'compactors' => [
                 Php::class,
-                DummyCompactor::class,
+                NullCompactor::class,
             ],
         ]);
 
         $compactors = $this->config->getCompactors()->toArray();
 
         self::assertInstanceOf(Php::class, $compactors[0]);
-        self::assertInstanceOf(DummyCompactor::class, $compactors[1]);
+        self::assertInstanceOf(NullCompactor::class, $compactors[1]);
         self::assertCount(2, $compactors);
 
         self::assertSame([], $this->config->getRecommendations());