public function testEqualsIgnoreCase()
{
$str1 = new Str("Hello, world.");
$str2 = new Str("HELLO, WORLD.");
$this->assertTrue($str1->equalsIgnoreCase($str1));
$str3 = new Str("ABCD");
$this->assertTrue($str3->equalsIgnoreCase("abcd"));
$str4 = new Str("1234");
try {
$this->assertFalse($str4->equalsIgnoreCase(1234));
} catch (StrInvalidArgumentException $ex) {
$this->assertEquals(get_class($ex), 'Str\\StrInvalidArgumentException');
}
}
