1]); $this->assertSame('', $input->show(0)); $this->assertSame('', $input->show('0')); $this->assertSame('', $input->show(1)); $this->assertSame('', $input->show('1')); $this->assertSame('', $input->show(true)); // test that the checked state does not "leak" $this->assertSame('', $input->show(0)); } }