public function testIsSingular()
{
$this->assertFalse(Tools::isSingular('dogs'));
$this->assertFalse(Tools::isSingular('Dogs'));
$this->assertFalse(Tools::isSingular('DOGS'));
$this->assertFalse(Tools::isSingular('quizzes'));
$this->assertFalse(Tools::isSingular('tomatoes'));
$this->assertFalse(Tools::isSingular('mice'));
$this->assertFalse(Tools::isSingular('people'));
$this->assertFalse(Tools::isSingular('companies'));
$this->assertTrue(Tools::isSingular('dog'));
$this->assertTrue(Tools::isSingular('Dog'));
$this->assertTrue(Tools::isSingular('DOG'));
$this->assertTrue(Tools::isSingular('quiz'));
$this->assertTrue(Tools::isSingular('tomato'));
$this->assertTrue(Tools::isSingular('mouse'));
$this->assertTrue(Tools::isSingular('person'));
$this->assertTrue(Tools::isSingular('equipment'));
$this->assertTrue(Tools::isSingular('company'));
}