public function Test_of_isBlank() { $Person = new TestPerson(); $this->assertTrue($Person->isBlank()); $this->assertTrue($Person->isBlank('')); $this->assertTrue($Person->isBlank(' ')); $this->assertTrue($Person->isBlank("\n\r")); $this->assertTrue($Person->isBlank("\t")); $this->assertFalse($Person->isBlank(0)); }