Fix notify

lib/Core/Command/ClosureCommand.php

@@ -20,7 +20,8 @@ public function __construct(Closure $closure)
      * @param mixed[] $args
      * @return mixed
      */
-    public function __invoke(...$args) {
+    public function __invoke(...$args)
+    {
         $closure = $this->closure;
         return $closure(...$args);
     }

lib/WorkDoneProgress/MessageProgressNotifier.php

@@ -42,7 +42,17 @@ public function begin(
         ?int $percentage = null,
         ?bool $cancellable = null
     ): void {
-        $this->api->info($message);
+        $progress = [
+            $title
+        ];
+
+        if ($message) {
+            $progress[] = sprintf(': %s', $message);
+        }
+        if ($percentage) {
+            $progress[] = sprintf(', %d%% done', $percentage);
+        }
+        $this->api->info(implode('', $progress));
     }
 
     /**

tests/Unit/WorkDoneProgress/ClientCapabilityDependentProgressNotifierTest.php

@@ -81,7 +81,7 @@ public function testNotifyWithoutWorkDoneProgressCapability(): void
         $message = $this->transmitter->shiftNotification();
         self::assertEquals('window/showMessage', $message->method);
         self::assertEquals(MessageType::INFO, $message->params['type']);
-        self::assertEquals('begin message', $message->params['message']);
+        self::assertEquals('title: begin message', $message->params['message']);
 
         $notifier->report($token, 'report message', 30);
         $message = $this->transmitter->shiftNotification();

tests/Unit/WorkDoneProgress/MessageProgressNotifierTest.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace Phpactor\LanguageServer\Tests\Unit\WorkDoneProgress;
+
+use PHPUnit\Framework\TestCase;
+use Phpactor\LanguageServer\Core\Server\ClientApi;
+use Phpactor\LanguageServer\Core\Server\ResponseWatcher\TestResponseWatcher;
+use Phpactor\LanguageServer\Core\Server\RpcClient\TestRpcClient;
+use Phpactor\LanguageServer\Core\Server\Transmitter\TestMessageTransmitter;
+use Phpactor\LanguageServer\WorkDoneProgress\MessageProgressNotifier;
+use Phpactor\LanguageServer\WorkDoneProgress\ProgressNotifier;
+use Phpactor\LanguageServer\WorkDoneProgress\WorkDoneToken;
+
+class MessageProgressNotifierTest extends TestCase
+{
+    /**
+     * @var TestMessageTransmitter
+     */
+    private $transmitter;
+    /**
+     * @var TestRpcClient
+     */
+    private $api;
+
+    protected function setUp(): void
+    {
+        $this->transmitter = new TestMessageTransmitter();
+        $this->api = new TestRpcClient($this->transmitter, new TestResponseWatcher());
+    }
+
+    public function testBegin(): void
+    {
+        $token = WorkDoneToken::generate();
+        $this->createNotifier()->begin($token, 'Hello');
+        self::assertEquals(1, $this->transmitter->count());
+        self::assertEquals('Hello', $this->transmitter->shiftNotification()->params['message']);
+    }
+
+    public function testBeginMessageAndPercentage(): void
+    {
+        $token = WorkDoneToken::generate();
+        $this->createNotifier()->begin($token, 'Indexer', 'this may take some time', 50);
+        self::assertEquals(1, $this->transmitter->count());
+        self::assertEquals('Indexer: this may take some time, 50% done', $this->transmitter->shiftNotification()->params['message']);
+    }
+
+    private function createNotifier(): ProgressNotifier
+    {
+        return new MessageProgressNotifier(new ClientApi($this->api));
+    }
+}