步骤中未包含可选参数时的黄瓜场景错误

Question

我的 Cucumber 应用程序中有这个步骤定义：

@Then("Client {string} just received {int} {string}")
@Then("Client {string} just received {int} messages, a {string} and a {string}")
public void clientJustReceivedRequestReject(String session, int numMessages, String message, String... additionalMessages) throws InterruptedException{
    receiver = new TcpClientReceiver(socketMap.get(session),properties,sessionsList.stream().filter(s->s.getName().equalsIgnoreCase(session)).findFirst().get(), new GlobalStatistics());
    List<String> messagesList=new ArrayList<>();
    messagesList.add(message);
    if (additionalMessages.length > 0) {
        Arrays.stream(additionalMessages).forEach(messagesList::add);
    }
    List<Message> messages=receiver.scanForMutlipleMessages(messagesList,"35");
    assertTrue(messages.size()==numMessages);

当我使用 step 运行场景时，Then Client "PC1" just received 2 messages, a "RequestReject" and a "AdminHeartbeat" 测试通过没有问题。但是，如果我使用步骤 Then Client "PC1" just received 1 "RequestReject 运行场景，我会收到以下错误：

io.cucumber.core.exception.CucumberException: Step [Client {string} just received {int} {string}] 在 'com.me.ed.testtool.StepDef.clientJustReceivedRequestReject(java.lang .String,int,java.lang.String,java.lang.String...)'。 但是，小黄瓜步骤有 3 个参数：

• “PC1”
• 1
• “请求拒绝” 步骤文本：客户端“PC1”刚刚收到 1 个“RequestReject” 在 io.cucumber.core.runner.PickleStepDefinitionMatch.arityMismatch（PickleStepDefinitionMatch.java:83） 在 io.cucumber.core.runner.PickleStepDefinitionMatch.runStep（PickleStepDefinitionMatch.java:42） 在 io.cucumber.core.runner.ExecutionMode$1.execute(ExecutionMode.java:10) 在 io.cucumber.core.runner.TestStep.executeStep(TestStep.java:92) 在 io.cucumber.core.runner.TestStep.run(TestStep.java:64) ...

我该如何解决这个问题，以便我可以有一个不包含可选参数的步骤？

Answer 1

Java 没有可选参数。 Java 确实有可变参数。它们有点像可选参数，但不完全是。

因此，您必须改为创建两个方法。如果您使用数据表，将更容易接受可变数量的消息。

Then Client "PC1" just received a "RequestReject"
Then Client "PC1" just received 2 messages:
  | RequestReject  |
  | AdminHeartbeat |

@Then("Client {string} just received a {string}")
public void clientJustReceived(String session, int numMessages, String message) {
    clientJustReceivedRequestReject(session, 1, Collections.singletonList(message));
}

@Then("Client {string} just received {int} messages:")
public void clientJustReceived(String session, int numMessages, List<String> messages) {

}