test(src): add unit tests for Filesystem::copy method.

src/Support/tests/Unit/FilesystemTest.php

@@ -0,0 +1,59 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * This file is part of MineAdmin.
+ *
+ * @link     https://www.mineadmin.com
+ * @document https://doc.mineadmin.com
+ * @contact  root@imoi.cn
+ * @license  https://github.com/mineadmin/MineAdmin/blob/master/LICENSE
+ */
+use Mine\Support\Filesystem;
+use Nette\Utils\FileSystem as BaseFileSystem;
+
+describe('copy', function () {
+    beforeEach(function () {
+        $this->sourceDir = sys_get_temp_dir() . '/source_' . uniqid();
+        $this->targetDir = sys_get_temp_dir() . '/target_' . uniqid();
+
+        BaseFileSystem::createDir($this->sourceDir);
+        BaseFileSystem::createDir($this->targetDir);
+    });
+
+    afterEach(function () {
+        BaseFileSystem::delete($this->sourceDir);
+        BaseFileSystem::delete($this->targetDir);
+    });
+
+    it('can copy nested directories while preserving existing files', function () {
+        BaseFileSystem::createDir($this->sourceDir . '/subDir');
+        file_put_contents($this->sourceDir . '/file1.txt', 'content1');
+        file_put_contents($this->sourceDir . '/subDir/file2.txt', 'content2');
+
+        BaseFileSystem::createDir($this->targetDir . '/subDir');
+        file_put_contents($this->targetDir . '/subDir/existing.txt', 'existing content');
+
+        Filesystem::copy($this->sourceDir, $this->targetDir);
+
+        expect($this->targetDir . '/subDir')->toBeDirectory()
+            ->and($this->targetDir . '/file1.txt')->toBeFile()
+            ->and($this->targetDir . '/subDir/file2.txt')->toBeFile()
+            ->and($this->targetDir . '/subDir/existing.txt')->toBeFile()
+            ->and(file_get_contents($this->targetDir . '/file1.txt'))->toBe('content1')
+            ->and(file_get_contents($this->targetDir . '/subDir/file2.txt'))->toBe('content2')
+            ->and(file_get_contents($this->targetDir . '/subDir/existing.txt'))->toBe('existing content')
+            ->and($this->sourceDir)->not->toBeDirectory();
+    });
+
+    it('can copy without deleting source directory', function () {
+        file_put_contents($this->sourceDir . '/test.txt', 'test content');
+
+        Filesystem::copy($this->sourceDir, $this->targetDir, false);
+
+        expect($this->sourceDir)->toBeDirectory()
+            ->and($this->sourceDir . '/test.txt')->toBeFile()
+            ->and($this->targetDir . '/test.txt')->toBeFile()
+            ->and(file_get_contents($this->targetDir . '/test.txt'))->toBe('test content');
+    });
+});