Hello @User';
$result = $parser->parseUserIdsFromHtml($html);
$this->assertEquals([5], $result);
// Test multiple mentions
$html = '@Alice and @Bob
';
$result = $parser->parseUserIdsFromHtml($html);
$this->assertEquals([1, 2], $result);
// Test filtering out invalid IDs (zero and negative)
$html = '@Invalid @Negative @Valid
';
$result = $parser->parseUserIdsFromHtml($html);
$this->assertEquals([3], $result);
// Test non-mention links are ignored
$html = 'Normal Link @User
';
$result = $parser->parseUserIdsFromHtml($html);
$this->assertEquals([7], $result);
// Test empty HTML
$result = $parser->parseUserIdsFromHtml('');
$this->assertEquals([], $result);
// Test duplicate user IDs
$html = '@User mentioned @User again
';
$result = $parser->parseUserIdsFromHtml($html);
$this->assertEquals([4], $result);
}
}