public function testEqualsZt()
{
$this->assertTrue(CMathf::equalsZt(1.234, 1.234));
$this->assertTrue(CMathf::equalsZt(1.2345678, 1.2345678));
$this->assertFalse(CMathf::equalsZt(1.2345678, 1.2345679));
$this->assertFalse(CMathf::equalsZt(1.2345678, 1.2345678 + CMathf::ZERO_TOLERANCE * 2));
$this->assertTrue(CMathf::equalsZt(10, 10));
}