/** * */ public function testIsLower() { $this->assertTrue(String::isLower('word')); $this->assertFalse(String::isLower('WORD')); $this->assertFalse(String::isLower('Word')); $this->assertFalse(String::isLower('WoRd')); $this->assertFalse(String::isLower('WOrd')); }