How to mock configuration.GetSection with FakeItEasy syntax?-CodePudding

I have the following appsettings.json configuration.

"SettingsConfig": [
{
  "Name": "Something",
  "Node": "Something",
  "SettingName": "Something"
},
{
  "Name": "Something",
  "Node": "Something",
  "SettingName": "Something"
}]

I want to write UnitTest ,but the following syntax does not work.

_configuration = A.Fake<IConfiguration>();
A.CallTo(() => _configuration.GetSection("SettingsConfig")).Returns(new List<SettingsConfig>());

Error message: IConfigurationSection does not contain definition for Returns.

How IConfiguration can be mocked with FakeItEasy syntax in order to apply mock data for UnitTesting?

CodePudding user response：

First, you should implement method that reads from file, which exists in the projects of unit test. So, if there is no file .json that you can read from you won;t be able to GetSection at all. So add file there then apply:

private IConfiguration ApplyConfiguration()
    {
        var configurationBuilder = new ConfigurationBuilder();
        configurationBuilder.AddJsonFile("settingsConfig.json");
        var config = configurationBuilder.Build();

        config.GetSection("settingsConfig").Get<List<SettingsConfig>>();

        return config;
    }

Then in your business logic add:

var config = ApplyConfiguration();

You will see that config contains all the configuration there, so no need to call OnCall .Returns() at all.