c# - 如何在 StepArgumentTransformation 中使用 REGEX 查找带前缀的字符串

Question

我想使用 SpecFlow 的 StepArgumentTransformation 将所有以“key:”为前缀的字符串转换为其他内容。我不知道如何使用正确的正则表达式。

假设我的功能文件中有以下步骤:

Given a user is logged in with key:testkey and has password key:testpassword and username John

这导致了这个步骤定义:

[Given(@"a user is logged in with (.*) and has password (.*) and username (.*)")]
public void GivenUserIsLoggedIn(string key, string password, string username)
{
    // To stuff
}

现在我想通过使用步骤参数转换来更改键值:

[StepArgumentTransformation(@"add correct regular expression here")]
public string TransformKeys(string value)
{
    // Do transformation
    return result;
}

我只希望以“key:”为前缀的值进入转换方法。我怎样才能做到这一点？我尝试了几种方法，例如

[StepArgumentTransformation(@"key:.*")
[StepArgumentTransformation(@"(key:.*)")
[StepArgumentTransformation(@"key:\w+")

但是我要么得到错误“参数计数不匹配”，要么根本没有输入转换方法。

Answer 1

注意:我使用的是specflow3作为版本

Scenario: stackoverflow usecase
    Given a user is logged in with key:testkey and has password key:testpassword and username John

在步骤定义中:

[Given(@"a user is logged in with (key:.*) and has password (key:.*) and username John")]
        public void GivenAUserIsLoggedInWithKeyTestkeyAndHasPasswordKeyTestpasswordAndUsernameJohn(string username, string password)
        {
            var user = username;
            var pass = password;

            Console.Write("username: {0} and password: {1} ", user, pass );
        }


[StepArgumentTransformation(@"key:(.*)")]
        public string ValueForKey(string value)
        {
            return value;
        }