/**
  * @test
  * it should allow replacing an unset global variable
  */
 public function it_should_allow_replacing_an_unset_global_variable()
 {
     $fooReplacement = Test::replaceGlobal('foo', __NAMESPACE__ . '\\OneClass::oneMethod', 23);
     global $foo;
     $this->assertEquals(23, $foo->oneMethod());
     $fooReplacement->wasCalledOnce('oneMethod');
 }