diff --git a/composer.json b/composer.json
index c711a99..ce0c555 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,8 @@
         "php": "^7.4|^8.0"
     },
     "require-dev": {
-        "orchestra/testbench": "6.x"
+        "orchestra/testbench": "6.x",
+        "doctrine/dbal": "^2.12.1"
     },
     "autoload": {
         "psr-4": {
@@ -30,5 +31,13 @@
                 "A2Workspace\\DatabasePatcher\\ServiceProvider"
             ]
         }
+    },
+    "scripts": {
+        "test": [
+            "vendor/bin/phpunit"
+        ],
+        "test-coverage": [
+            "vendor/bin/phpunit --coverage-html coverage"
+        ]
     }
 }
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index b9fa7c2..23acb3a 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -13,12 +13,14 @@
     stopOnFailure="false"
     xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd"
 >
+    <coverage>
+        <include>
+            <directory suffix=".php">src</directory>
+        </include>
+    </coverage>
     <testsuites>
-        <testsuite name="Unit">
-            <directory suffix="Test.php">./tests/Unit</directory>
-        </testsuite>
-        <testsuite name="Feature">
-            <directory suffix="Test.php">./tests/Feature</directory>
+        <testsuite name="Package Test">
+            <directory suffix="Test.php">./tests/</directory>
         </testsuite>
     </testsuites>
     <php>
diff --git a/src/Commands/DbPatchCommand.php b/src/Commands/DbPatchCommand.php
index c9bd80b..c1f1af8 100644
--- a/src/Commands/DbPatchCommand.php
+++ b/src/Commands/DbPatchCommand.php
@@ -2,10 +2,9 @@
 
 namespace A2Workspace\DatabasePatcher\Commands;
 
+use Illuminate\Support\Str;
 use Illuminate\Console\Command;
 use Illuminate\Support\Collection;
-use Illuminate\Support\Str;
-use Illuminate\Filesystem\Filesystem;
 use Symfony\Component\Finder\Finder;
 use Symfony\Component\Finder\SplFileInfo;
 
@@ -47,7 +46,7 @@ class DbPatchCommand extends Command
      *
      * @return int
      */
-    public function handle()
+    public function handle(): int
     {
         $file = $this->determinePatchFile();
         if (!$file) {
@@ -55,36 +54,24 @@ public function handle()
         }
 
         $path = $file->getRealPath();
-        $path = Str::after($path, base_path());
-
-        // 這邊我們判斷
-        // 若為回復模式則呼叫滾回命令並傳入補丁檔案路徑
-        if ($this->option('revert')) {
-            $this->info("Running: php artisan migrate:rollback --path={$path}");
 
-            $this->call('migrate:rollback', [
-                '--path' => $path,
-            ]);
+        if ($this->usingRevertion()) {
+            return $this->callMigrateCommand($path, 'migrate:rollback');
         }
 
-        // 呼叫遷移命令並傳入補丁檔案路徑
-        else {
-            $this->info("Running: php artisan migrate --path={$path}");
-
-            $this->call('migrate', [
-                '--path' => $path,
-            ]);
-        }
-
-        return 0;
+        return $this->callMigrateCommand($path);
     }
 
+    // =========================================================================
+    // = DeterminePatchFile()
+    // =========================================================================
+
     /**
      * 決定要被使用的檔案
      *
      * @return \Symfony\Component\Finder\SplFileInfo|null
      */
-    protected function determinePatchFile()
+    protected function determinePatchFile(): ?SplFileInfo
     {
         // 取得 patches 目錄的檔案列表，若結果為空則提前終止
         $files = $this->getFileList();
@@ -125,7 +112,7 @@ protected function getFilterInput()
      */
     protected function getFileList(): Collection
     {
-        $paths = [database_path('patches')];
+        $paths = $this->laravel['config']['database.patcher.paths'] ?? database_path('patches');
 
         return collect($paths)
             ->map(fn ($path) => $this->getFileListInDirectory($path))
@@ -144,6 +131,7 @@ protected function getFileListInDirectory(string $path): array
             ->filter(function (SplFileInfo $file) {
                 return !in_array($file->getRelativePathname(), $this->excludedNames);
             })
+            ->ignoreDotFiles(true)
             ->files()
             ->in($path)
             ->depth(0)
@@ -178,4 +166,39 @@ protected function choiceFromFileList($question, Collection $files): SplFileInfo
             return $value[0] === $input;
         })[1];
     }
+
+    // =========================================================================
+    // = UsingRevertion()
+    // =========================================================================
+
+    /**
+     * 判定是否為 revert 模式
+     *
+     * @return bool
+     */
+    protected function usingRevertion(): bool
+    {
+        return $this->input->hasOption('revert') && $this->option('revert');
+    }
+
+    // =========================================================================
+    // = CallMigrateCommand()
+    // =========================================================================
+
+    /**
+     * 呼叫運行 migrate 指令並傳入路徑
+     *
+     * @param  string  $path
+     * @param  string  $command
+     * @return int
+     */
+    protected function callMigrateCommand($path, string $command = 'migrate'): int
+    {
+        $path = Str::after($path, base_path());
+
+        $this->info("Running: php artisan {$command} --path={$path}");
+        $this->call($command, ['--path' => $path]);
+
+        return 0;
+    }
 }
diff --git a/tests/CallDbPatchArtisanCommandTest.php b/tests/CallDbPatchArtisanCommandTest.php
new file mode 100644
index 0000000..e489b46
--- /dev/null
+++ b/tests/CallDbPatchArtisanCommandTest.php
@@ -0,0 +1,158 @@
+<?php
+
+namespace Tests;
+
+use Illuminate\Testing\PendingCommand;
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Support\Facades\Artisan;
+use Illuminate\Database\Schema\Blueprint;
+use Tests\TestCase;
+
+class CallDbPatchArtisanCommandTest extends TestCase
+{
+    use TestArtisanCommandHelpers;
+
+    protected static $published;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        Schema::create('products', function (Blueprint $table) {
+            $table->increments('id');
+            $table->string('ian')->unique();
+            $table->string('name');
+        });
+
+        if (empty(static::$published)) {
+            Artisan::call('vendor:publish', [
+                '--tag' => '@a2workspace/laravel-database-patcher',
+            ]);
+
+            static::$published = database_path('patches');
+        }
+    }
+
+    public static function tearDownAfterClass(): void
+    {
+        @unlink(static::$published);
+        @rmdir(static::$published);
+    }
+
+    // =========================================================================
+    // = Tests
+    // =========================================================================
+
+    public function test_call_artisan_command()
+    {
+        // =====================================================================
+        // = Step 1: Install specified patch file.
+        // =====================================================================
+
+        $command = $this->artisan('db:patch');
+
+        $command->expectsChoice(
+            '選擇補丁檔案',
+            $this->parseLabel('2022_07_19_000000_add_priority_to_products_table.php'),
+            [
+                $this->parseLabel('2022_07_19_000000_add_priority_to_products_table.php')
+            ],
+        );
+
+        $command->expectsOutput(sprintf(
+            'Running: php artisan migrate --path=%s',
+            $this->resolvePath('/database/patches/2022_07_19_000000_add_priority_to_products_table.php')
+        ));
+
+        $command->assertExitCode(0);
+        $command->run();
+
+        $this->assertDatabaseHas(
+            'migrations',
+            ['migration' => '2022_07_19_000000_add_priority_to_products_table']
+        );
+
+        $this->assertDatabaseTableHasColumn('products', 'priority');
+
+        // =====================================================================
+        // = Step 2: Revert it.
+        // =====================================================================
+
+        $command2 = $this->artisan('db:patch', ['--revert' => true]);
+
+        $command2->expectsChoice(
+            '選擇補丁檔案',
+            $this->parseLabel('2022_07_19_000000_add_priority_to_products_table.php'),
+            [
+                $this->parseLabel('2022_07_19_000000_add_priority_to_products_table.php')
+            ],
+        );
+
+        $command2->expectsOutput(sprintf(
+            'Running: php artisan migrate:rollback --path=%s',
+            $this->resolvePath('/database/patches/2022_07_19_000000_add_priority_to_products_table.php')
+        ));
+
+        $command2->assertExitCode(0);
+        $command2->run();
+
+        $this->assertDatabaseTableMissingColumn('products', 'priority');
+
+        $this->assertDatabaseMissing(
+            'migrations',
+            ['migration' => '2022_07_19_000000_add_priority_to_products_table']
+        );
+    }
+
+    public function test_call_artisan_command_with_filter()
+    {
+        $command = $this->artisan('db:patch', [
+            'filter' => 'product',
+        ]);
+
+        $command->expectsChoice(
+            '選擇補丁檔案',
+            $this->parseLabel('2022_07_19_000000_add_priority_to_products_table.php'),
+            [
+                $this->parseLabel('2022_07_19_000000_add_priority_to_products_table.php')
+            ],
+        );
+
+        $command->expectsOutput(sprintf(
+            'Running: php artisan migrate --path=%s',
+            $this->resolvePath('/database/patches/2022_07_19_000000_add_priority_to_products_table.php')
+        ));
+
+        $command->assertExitCode(0);
+        $command->run();
+
+        $this->assertDatabaseHas(
+            'migrations',
+            ['migration' => '2022_07_19_000000_add_priority_to_products_table']
+        );
+
+        $this->assertDatabaseTableHasColumn('products', 'priority');
+    }
+
+    public function test_call_artisan_command_with_filter_then_not_found()
+    {
+        $command = $this->artisan('db:patch', [
+            'filter' => '__IMIFUMEI__',
+        ]);
+
+        $command->expectsOutput('找不到符合的補丁檔案');
+        $command->assertExitCode(1);
+        $command->run();
+    }
+
+    public function test_call_artisan_command_when_directory_is_empty()
+    {
+        $this->app->config->set('database.patcher.paths', []);
+
+        $command = $this->artisan('db:patch');
+
+        $command->expectsOutput('找不到任何補丁檔案');
+        $command->assertExitCode(1);
+        $command->run();
+    }
+}
diff --git a/tests/TestArtisanCommandHelpers.php b/tests/TestArtisanCommandHelpers.php
new file mode 100644
index 0000000..342ceec
--- /dev/null
+++ b/tests/TestArtisanCommandHelpers.php
@@ -0,0 +1,55 @@
+<?php
+
+namespace Tests;
+
+use Illuminate\Support\Facades\Schema;
+
+trait TestArtisanCommandHelpers
+{
+    /**
+     * @param  string  $option
+     * @return string
+     */
+    private function parseLabel(string $option): string
+    {
+        return "-> {$option}";
+    }
+
+    /**
+     * @param  string  $table
+     * @param  string  $column
+     * @return self
+     */
+    private function assertDatabaseTableHasColumn($table, $column)
+    {
+        $this->assertTrue(
+            Schema::hasColumn($table, $column),
+            sprintf(
+                'The table [%s] doesn\'t have the column named %s',
+                $table,
+                $column
+            )
+        );
+
+        return $this;
+    }
+
+    /**
+     * @param  string  $table
+     * @param  string  $column
+     * @return self
+     */
+    private function assertDatabaseTableMissingColumn($table, $column)
+    {
+        $this->assertFalse(
+            Schema::hasColumn($table, $column),
+            sprintf(
+                'The table [%s] have the column named %s',
+                $table,
+                $column
+            )
+        );
+
+        return $this;
+    }
+}
diff --git a/tests/TestCase.php b/tests/TestCase.php
new file mode 100644
index 0000000..5b4285e
--- /dev/null
+++ b/tests/TestCase.php
@@ -0,0 +1,51 @@
+<?php
+
+namespace Tests;
+
+use Closure;
+use A2Workspace\DatabasePatcher\ServiceProvider;
+use Orchestra\Testbench\TestCase as BaseTestCase;
+
+abstract class TestCase extends BaseTestCase
+{
+    protected function getEnvironmentSetUp($app)
+    {
+        // ...
+    }
+
+    protected function getPackageProviders($app)
+    {
+        return [ServiceProvider::class];
+    }
+
+    // =========================================================================
+    // = Helpers
+    // =========================================================================
+
+    /**
+     * 生成能執行被保護方法的反射函數
+     *
+     * @param  string  $name
+     * @param  object  $scope
+     * @return \Closure
+     */
+    protected function refMethod($name, $scope): Closure
+    {
+        $ref = function () use ($name) {
+            return $this->$name(...func_get_args());
+        };
+
+        return $ref->bindTo($scope, $scope);
+    }
+
+    /**
+     * 處理不同作業系統下的路徑
+     *
+     * @param  string  $path
+     * @return string
+     */
+    protected function resolvePath(string $path): string
+    {
+        return str_replace('/', DIRECTORY_SEPARATOR, $path);
+    }
+}