Add success and failure command assertions

src/Illuminate/Testing/PendingCommand.php

@@ -10,6 +10,7 @@
 use Mockery;
 use Mockery\Exception\NoMatchingExpectationException;
 use PHPUnit\Framework\TestCase as PHPUnitTestCase;
+use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Helper\Table;
 use Symfony\Component\Console\Input\ArrayInput;
 use Symfony\Component\Console\Output\BufferedOutput;
@@ -192,6 +193,30 @@ public function assertExitCode($exitCode)
         return $this;
     }
 
+    /**
+     * Assert that the command has the success exit code.
+     *
+     * @return $this
+     */
+    public function assertSuccessExitCode()
+    {
+        $this->expectedExitCode = Command::SUCCESS;
+
+        return $this;
+    }
+
+    /**
+     * Assert that the command has the failure exit code.
+     *
+     * @return $this
+     */
+    public function assertFailureExitCode()
+    {
+        $this->expectedExitCode = Command::FAILURE;
+
+        return $this;
+    }
+
     /**
      * Execute the command.
      *