Question

我正在运行以下测试来验证汽车的车牌。我做错了什么？

testInvalid返回错误

testValid返回成功

@Test
fun testInvalid() {
 val value = "ABC12345"
 val pattern = Pattern.compile("[A-Z]{3}[0-9]{4}")
 val matcher = pattern.matcher(value)

 val found = matcher.find()

 System.out.print("$value is valid: $found")
 Assert.assertFalse(found)
}

@Test
fun testValid() {
 val value = "ABC1234"
 val pattern = Pattern.compile("[A-Z]{3}[0-9]{4}")
 val matcher = pattern.matcher(value)

 val found = matcher.find()

 System.out.print("$value is valid: $found")
 Assert.assertTrue(found)
}

Answer 1

您需要在regEx末尾使用$字符来表示结束：

@Test
fun testInvalid() {
    val value = "ABC12345"
    val pattern = Pattern.compile("[A-Z]{3}[0-9]{4}$")
    val matcher = pattern.matcher(value)

    val found = matcher.find()

    System.out.print("$value is valid: $found")
    Assert.assertFalse(found)
}
@Test
fun testValid() {
    val value = "ABC1234"
    val pattern = Pattern.compile("[A-Z]{3}[0-9]{4}$")
    val matcher = pattern.matcher(value)

    val found = matcher.find()

    System.out.print("$value is valid: $found")
    Assert.assertTrue(found)
}

汽车牌照正则表达式验证出错

1 个答案: