Fix tests (self:: inside prophecy mock)

Author: Pavel Batanov

composer.json

@@ -18,6 +18,7 @@
   },
   "require-dev": {
     "phpunit/phpunit": "~4.5|~5.1",
+    "phpunit/php-code-coverage": "~2.1|~3.0",
     "psr/cache": "~1.0"
   },
   "autoload": {

src/ScayTrase/Api/JsonRpc/Tests/JsonRpcClientTest.php

@@ -64,8 +64,8 @@ function ($args) use ($self, $params, $isArray) {
                 $content = $request->getBody()->getContents();
                 $data = json_decode($content);
                 if ($isArray) {
-                    self::assertTrue(is_array($data));
-                    self::assertNotEmpty($data);
+                    $self::assertTrue(is_array($data));
+                    $self::assertNotEmpty($data);
                     $data = array_shift($data);
                 }
                 $self::assertEquals(JSON_ERROR_NONE, json_last_error());
@@ -86,8 +86,8 @@ function () {
                 );
             }
         );
-        $client = new JsonRpcClient($guzzle->reveal(), new Uri('http://localhost/'));
-        return $client;
+
+        return new JsonRpcClient($guzzle->reveal(), new Uri('http://localhost/'));
     }
 
     /**