/** * @return null */ public function testIsEnableDisableZeroFill() { $this->assertFalse($this->type->isZeroFill()); $this->assertSame($this->type, $this->type->enableZeroFill()); $this->assertTrue($this->type->isZeroFill()); $this->assertSame($this->type, $this->type->disableZeroFill()); $this->assertFalse($this->type->isZeroFill()); }