public function testSqrt()
{
$t = new Sqrt();
$this->assertSame(2.0, $t->testInt());
$this->assertSame(2.0, $t->testVar());
$this->assertSame(2.0, $t->testIntValue1());
$this->assertSame(4.0, $t->testIntValue2());
$this->assertSame(2.0, $t->testIntParameter(4));
$this->assertSame(4.0, $t->testIntParameter(16));
$this->assertSame(2.0, $t->testVarParameter(4));
$this->assertSame(4.0, $t->testVarParameter(16));
}