Add test to verify that CallMap is OK

tests/SomeTest.php

@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+
+namespace Psalm\Tests;
+
+
+use Psalm\Context;
+
+class SomeTest extends TestCase
+{
+
+    public function testStuff()
+    {
+        $this->addFile(
+            'somefile.php',
+            '<?php
+                class A
+                {
+                }
+
+                $reflected_class = new ReflectionClass(A::class);
+                $reflected_class->getReflectionConstants(1);
+                '
+        );
+
+        $this->analyzeFile('somefile.php', new Context());
+    }
+}