Added more tests

See: #1961, #1970

test/globals/server.zep

@@ -1,21 +1,27 @@
-
 namespace Test\Globals;
 
 class Server
 {
-	public function f1() -> void
-	{
-		echo _SERVER["PHP_SELF"];
-		this->f2();
-		echo _SERVER["PHP_SELF"];
-	}
+    /**
+    * @see https://github.com/phalcon/zephir/issues/1961
+    */
+    public function f1() -> void
+    {
+        echo _SERVER["PHP_SELF"];
+        this->f2();
+        echo _SERVER["PHP_SELF"];
+    }
 
-	public function f2() -> void
-	{
-		echo _SERVER["SCRIPT_NAME"];
-	}
+    public function f2() -> void
+    {
+        echo _SERVER["SCRIPT_NAME"];
+    }
 
-	public function check() {
-		return _SERVER["HTTP_USER_AGENT"];
-	}
+    /**
+    * @see https://github.com/phalcon/zephir/issues/1970
+    */
+    public function check() -> var
+    {
+        return _SERVER["HTTP_USER_AGENT"];
+    }
 }

unit-tests/Extension/Globals/ServerTest.php

@@ -0,0 +1,64 @@
+<?php
+
+/*
+ * This file is part of the Zephir.
+ *
+ * (c) Zephir Team <team@zephir-lang.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Extension\Globals;
+
+use PHPUnit\Framework\TestCase;
+use Test\Globals\Server;
+
+class ServerTest extends TestCase
+{
+    private $server;
+
+    /**
+     * This method is called before each test.
+     */
+    protected function setUp()
+    {
+        $this->server = $_SERVER;
+    }
+
+    /**
+     * This method is called after each test.
+     */
+    protected function tearDown()
+    {
+        $_SERVER = $this->server;
+    }
+
+    /**
+     * @test
+     * @see https://github.com/phalcon/zephir/issues/1961
+     */
+    public function shouldPrintPhpSelf()
+    {
+        $test = new Server();
+
+        ob_start();
+        $test->f1();
+        $actual = ob_get_contents();
+        ob_end_clean();
+
+        $this->assertSame(str_repeat($_SERVER['PHP_SELF'], 3), $actual);
+    }
+
+    /**
+     * @test
+     * @see https://github.com/phalcon/zephir/issues/1961
+     */
+    public function shouldPrintUserAgent()
+    {
+        $test = new Server();
+        $_SERVER['HTTP_USER_AGENT'] = 'Test';
+
+        $this->assertSame('Test', $test->check());
+    }
+}