cumberjvmversion3将设计模式替换为映射<String,String>操作的简单表

io.cucumber.datatable.DataTable 黄瓜中引入的支持-jvm:3.0.0。我有黄瓜-jvm:已安装3.0.2。

我现有的黄瓜-jvm:2.4.0项目使用了一个简单的设计模式,在这个模式中,我将一个表传递到一个步骤中,该步骤的最后一个参数具有类型Map。版本3不再支持此行为。

所以我创建了一个测试用例来模拟这个设计模式的替代方案。它可以工作,但是返回的映射是不可修改的。我解决了这个问题,但有两个问题:

1. 为什么返回的映射是不可变的?我是否忽略了一个重要的设计原则?

代码如下:

# h/t to https://github.com/cucumber/datatable-java/edit/master/datatable/src/test/java/io/cucumber/datatable/DataTableTypeRegistryTableConverterTest.java
Feature: Test simple DataTable converters  

  @simple_no_header_map_string_string
  Scenario: Convert a two column table to a Map
    Given a basic street address
      | streetAddress | 333 W Camden St |
      | cityName      | Baltimore       |
      | stateName     | MD              |
      | postalCode    | 21201           |
    When I specify Country "US"
    Then I can print the complete address 


package some.org.stuff.cucumberjvm302testbed;

import cucumber.api.java.en.Given;
import cucumber.api.java.en.Then;
import cucumber.api.java.en.When;

import io.cucumber.datatable.DataTable;
import io.cucumber.datatable.DataTable.TableConverter;
import io.cucumber.datatable.DataTableTypeRegistry;
import io.cucumber.datatable.DataTableTypeRegistryTableConverter;
import io.cucumber.datatable.TypeReference;

import java.lang.reflect.Type;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;

public class Cucumber302TestBedSteps {

    private Map<String,String> addressMap;

    private final DataTableTypeRegistry registry = new DataTableTypeRegistry(Locale.ENGLISH);
    private final TableConverter converter = new DataTableTypeRegistryTableConverter(registry);
    private static final Type MAP_OF_STRING_TO_STRING = new TypeReference<Map<String, String>>() {
    }.getType();

    @Given("^a basic street address$")
    public void aBasicStreetAddress(DataTable datatable) {
        //Here is the workaround to make addressMap mutable
        addressMap = new HashMap<String,String>(converter.convert(datatable, MAP_OF_STRING_TO_STRING)); 
    }

    @When("^I specify Country \"(.+)\"$")
    public void iSpecifyCountry(String inputCountry) {
        addressMap.put("country", inputCountry);
    }

    @Then("^I can print the complete address$")
    public void iCanPrintTheCompleteAddress() {
        System.out.println("\n\t" + addressMap.get("streetAddress"));
        System.out.println("\t" + addressMap.get("cityName"));
        System.out.println("\t" + addressMap.get("stateName"));
        System.out.println("\t" + addressMap.get("postalCode"));
        System.out.println("\t" + addressMap.get("country") + "\n");
    }
}

我看着 Cucumber-JVM 3 - Convert DataTable to single object using asMap()