Scala 如何通过检查不正确的字符串模式来编写测试以进行分析
我想编写测试代码,用逗号分隔符检查数字字符串的解析。代码是:Scala 如何通过检查不正确的字符串模式来编写测试以进行分析,scala,scalatest,scopt,Scala,Scalatest,Scopt,我想编写测试代码,用逗号分隔符检查数字字符串的解析。代码是: case class TestConfig(macroregions: Option[Seq[Int]] = None) object TestConfig { private val parser = new scopt.OptionParser[TestConfig]("Test") { ... opt[String]('r', "stringArrayWithNumbers")
case class TestConfig(macroregions: Option[Seq[Int]] = None)
object TestConfig {
private val parser = new scopt.OptionParser[TestConfig]("Test") {
...
opt[String]('r', "stringArrayWithNumbers")
.....
.validate { mrs =>
if (mrs.matches("""\d+(?:\s*,\s*\d+)*""")) success
else failure("String should not be in pattern number with comma.")
}
....
}
def parseArgs(args: Array[String]): TestConfig = parser
.parse(args, TestConfig())
.getOrElse(sys.error("Could not parse arguments"))
}
当字符串模式不正确时,测试必须通过消息“字符串不应位于带逗号的模式编号中”来检查故障的出现情况。。例如“1,2,3”
或“ew3,56,66”
。如何捕捉正确的信息
我的版本(不检查目标失败消息)
请参阅scopt的高级功能:
使用
sys.error
进行验证失败很少发生recommended@cchantep非常感谢。在scala中抛出异常的更好方法是什么?最好的方法是不抛出异常。对带有验证错误的API建模的最佳方法是返回验证(monadic)类型
"TestConfig" should "return failure of incorrect String pattern" in {
val cmdLine =
""" | --numbers 1,2,3,4,""".stripMargin
val args = cmdLine.replace("\r\n", "").split("\\s")
val thrown = the[RuntimeException] thrownBy TestConfig.parseArgs(args)
thrown.getMessage should equal "Could not parse arguments"
}
val outCapture = new ByteArrayOutputStream
val errCapture = new ByteArrayOutputStream
Console.withOut(outCapture) {
Console.withErr(errCapture) {
val result = OParser.parse(parser1, args, Config())
}
}
// Now stderr output from this block is in errCapture.toString, and stdout in outCapture.toString