function test_trim()
{
// Trim from the end.
$inputText = "ABC \n\n DEF\r\nGHI\r\n\r\nJKL";
$expected = "ABC \n\n DEF\r\nGHI\r\n\r\nJKL";
$this->assertEquals($expected, UtilString::trim($inputText));
$inputText = "ABC \n\n DEF\r\nGHI\r\n\r\nJKL \n";
$expected = "ABC \n\n DEF\r\nGHI\r\n\r\nJKL";
$this->assertEquals($expected, UtilString::trim($inputText));
// Trim from the beginning.
$inputText = "ABC \n\n DEF\r\nGHI\r\n\r\nJKL";
$expected = "ABC \n\n DEF\r\nGHI\r\n\r\nJKL";
$this->assertEquals($expected, UtilString::trim($inputText, UtilString::TRIM_BEGINNING));
$inputText = " \r\n ABC \n\n DEF\r\nGHI\r\n\r\nJKL \n";
$expected = "ABC \n\n DEF\r\nGHI\r\n\r\nJKL \n";
$this->assertEquals($expected, UtilString::trim($inputText, UtilString::TRIM_BEGINNING));
// Trim from both the beginning and the end.
$inputText = "ABC \n\n DEF\r\nGHI\r\n\r\nJKL";
$expected = "ABC \n\n DEF\r\nGHI\r\n\r\nJKL";
$this->assertEquals($expected, UtilString::trim($inputText, UtilString::TRIM_BOTH));
$inputText = " \r\n ABC \n\n DEF\r\nGHI\r\n\r\nJKL \n";
$expected = "ABC \n\n DEF\r\nGHI\r\n\r\nJKL";
$this->assertEquals($expected, UtilString::trim($inputText, UtilString::TRIM_BOTH));
}
