public function testGetMentions()
 {
     $fooBarUsernames = ['foo', 'bar'];
     $fooBarDto = [m::mock(ConfirmedMentionDto::class), m::mock(ConfirmedMentionDto::class)];
     $fooBarEntities = [m::mock(Mention::class), m::mock(Mention::class)];
     $this->mentionsParser->shouldReceive('findMentions')->with('Hello @foo and @bar')->once()->andReturn($fooBarUsernames);
     $this->mentionsFetcher->shouldReceive('fetchMentions')->with($fooBarUsernames)->once()->andReturn($fooBarDto);
     $this->mentionsMapper->shouldReceive('map')->with($fooBarDto)->once()->andReturn($fooBarEntities);
     $entities = $this->mentionsResolver->getMentions('Hello @foo and @bar');
     $this->assertEquals($fooBarEntities, $entities);
 }