add method 'stash'

readme.md

@@ -94,6 +94,16 @@ $git = new Git('/var/web/project');
 var_dump($git->add('file_name'));
 ```
 
+#### git stash:
+
+```php
+use ArtARTs36\GitHandler\Git;
+
+$git = new Git('/var/web/project');
+$git->stash();
+$git->stash('message');
+```
+
 #### create folder in repository:
 
 ```php

src/Git.php

@@ -145,6 +145,30 @@ public function clone(string $url): bool
         return false;
     }
 
+    /**
+     * equals: git stash
+     * @param string $message
+     * @return bool
+     */
+    public function stash(string $message = null): bool
+    {
+        $sh = $this->executeCommand($this->newCommand()
+            ->addParameter('stash')
+            ->when(!empty($message), function (ShellCommand $command) use ($message) {
+                $command
+                    ->addParameter('save')
+                    ->addParameter('"'. $message .'"');
+            }));
+
+        if (Str::contains($sh, 'Saved working directory and index') ||
+            Str::contains($sh, 'No local changes to save')
+        ) {
+            return true;
+        }
+
+        return false;
+    }
+
     /**
      * @return string
      */

tests/GitTest.php

@@ -1,6 +1,6 @@
 <?php
 
-namespace ArtARTs36\GitHandler\Tests\Unit;
+namespace ArtARTs36\GitHandler\Tests;
 
 use ArtARTs36\GitHandler\Exceptions\BranchNotFound;
 use ArtARTs36\GitHandler\Exceptions\FileNotFound;
@@ -129,6 +129,28 @@ public function testClone(): void
             "and is not an empty directory.", $dir)->clone($url);
     }
 
+    /**
+     * @covers \ArtARTs36\GitHandler\Git::stash
+     */
+    public function testStash(): void
+    {
+        $git = $this->mock('');
+
+        self::assertFalse($git->stash());
+
+        //
+
+        $git = $this->mock('Saved working directory and index state WIP on master: b68fd9d test');
+
+        self::assertTrue($git->stash());
+
+        //
+
+        $git = $this->mock('No local changes to save');
+
+        self::assertTrue($git->stash());
+    }
+
     /**
      * @param string $shellResult
      * @param string|null $dir