黄瓜JS自定义格式化程序

Question

我正在尝试学习如何为Cucumber JS编写简单的自定义格式化程序。

我已阅读https://github.com/cucumber/cucumber-js/blob/master/docs/custom_formatters.md

我在下面尝试了此示例。但是它没有输出任何东西。该文档讨论有关为日志功能设置基础流的信息。但是我看不到任何设置的流选项，自定义格式程序样本也没有。

所以我的问题是如何从下面获取此简单示例以将输出记录到stdout？

我正在按照文档中提到的以下方式运行测试，以使用此新格式化程序

./ node_modules / .bin / cucumber-js -f。\ simple_formatter.js ./Features -r ./Steps

const { Formatter, formatterHelpers, Status } = require("cucumber");
const { stdout } = require("process");

class SimpleFormatter extends Formatter {
  constructor(options) {
    super(options);

    options.eventBroadcaster.on("envelope", (envelope) => {
      if (envelope.testCaseFinished) {
        this.logTestCaseFinished(envelope.testCaseFinished);
      } else if (envelope.testRunFinished) {
        this.logTestRunFinished(envelope.testRunFinished);
      }
    });
  }

  logTestCaseFinished(testCaseFinished) {
    const testCaseAttempt = this.eventDataCollector.getTestCaseAttempt(
      testCaseFinished.testCaseStartedId
    );
    this.log(
      testCaseAttempt.gherkinDocument.feature.name +
        " / " +
        testCaseAttempt.pickle.name +
        "\n"
    );
    const parsed = formatterHelpers.parseTestCaseAttempt({
      cwd: this.cwd,
      snippetBuilder: this.snippetBuilder,
      supportCodeLibrary: this.supportCodeLibrary,
      testCaseAttempt,
    });
    parsed.testSteps.forEach((testStep) => {
      this.log(
        "  " +
          testStep.keyword +
          (testStep.text || "") +
          " - " +
          Status[testStep.result.status] +
          "\n"
      );
    });
    this.log("\n");
  }
  logTestRunFinished(testRunFinished) {
    this.log(testRunFinished.success ? "SUCCESS" : "FAILURE");
  }
}
module.exports = SimpleFormatter;