如何高效复用Specflow场景大纲及步骤，无需重复编写整套测试场景

方案1：场景层复用，无需复制场景大纲 #

直接把作用域类型作为参数放到场景大纲的占位符中，调整步骤的占位符后在Examples表新增对应列即可，一套场景可以覆盖所有作用域类型的测试：

Scenario Outline: Member is assigned to dynamic scope

    Given a dynamic <scope type> scope with "<id>", "<name>", "<description>" and "<filter>" exist
    When I post new member assign request with "<member id>", "<first name>", "<last name>" and "<email>"
    Then the response is "<status code>"
    And a member with "<member id>", "<first name>", "<last name>" and "<email>" is added to the dynamic <scope type> scope

Examples:
| no | scope type | id | name | desc | filter | member id | first name | last name | email      | status code |
| 1  | device     | 01 | name | desc | filter | ee749612  | first      | last      | t1@mail.com| Created     |
| 2  | people     | 02 | name | desc | filter | ee749613  | first2     | last2     | t2@mail.com| Created     |

方案2：调整步骤绑定代码，兼容多类型作用域 #

修改原来的Given步骤正则，把作用域类型作为参数捕获，通过分支逻辑调用不同的构造方法即可，不需要写两个独立的Given步骤：

[Given(@"a dynamic (device|people) scope with ""(.*)"", ""(.*)"", ""(.*)"" and ""(.*)"" exist")]
public void GivenADynamicScopeWithAndExist(string scopeType, Guid id, string name, string description, string filter)
{
    if (scopeType == "device")
    {
        _scopeId = _scenarioSettings.ScopesStorage.BuildTestDynamicDeviceScope(id, name, description, filter);
    }
    else if (scopeType == "people")
    {
        // 调用dynamic people scope对应的构造方法
        _scopeId = _scenarioSettings.ScopesStorage.BuildTestDynamicPeopleScope(id, name, description, filter);
    }
}

如果后续作用域类型会持续增加，可以用字典映射简化逻辑，避免堆叠if-else：

// 类内初始化映射字典
private readonly Dictionary<string, Func<Guid, string, string, string, Guid>> _scopeBuilderMap 
    = new Dictionary<string, Func<Guid, string, string, string, Guid>>
    {
        ["device"] = (id, name, desc, filter) => _scenarioSettings.ScopesStorage.BuildTestDynamicDeviceScope(id, name, desc, filter),
        ["people"] = (id, name, desc, filter) => _scenarioSettings.ScopesStorage.BuildTestDynamicPeopleScope(id, name, desc, filter)
    };

// 步骤方法简化为
[Given(@"a dynamic (device|people) scope with ""(.*)"", ""(.*)"", ""(.*)"" and ""(.*)"" exist")]
public void GivenADynamicScopeWithAndExist(string scopeType, Guid id, string name, string description, string filter)
{
    _scopeId = _scopeBuilderMap[scopeType](id, name, description, filter);
}

对应的Then步骤中涉及作用域类型的绑定代码，也可以按照相同的正则改造逻辑复用，不需要重复写步骤实现。

内容的提问来源于stack exchange，提问作者Mihai Usurelu