CODEWITHSUNDEEP
c#asp.net-mvcunit-testingasp.net-core
James Wierzba
James Wierzba

Reputation: 17548

How to initialize IOption<AppSettings> for unit testing a .NET core MVC service?

I have a .NET core MVC rest service. I have a controller I wish to test. This controller has a constructor argument of IOptions where AppSettings is my class for config settings ( I store my database connection string in it). It gets injected from the setup in ConfigureServices in Startup.cs

The rest service works. My problem is I've set up a MSTest test project to test the service. I can't figure out how to initialize an instance of IOptions to satisfy the constructor of my controller.

Upvotes: 66

Views: 28904

Answers (1)

James Wierzba
James Wierzba

Reputation: 17548

I discovered the answer shortly after posting the question.

use Helper class Microsoft.Extensions.Options.Options

Creates a wrapper around an instance of TOptions to return itself as IOptions

AppSettings appSettings = new AppSettings() { ConnectionString = "..." };
IOptions<AppSettings> options = Options.Create(appSettings);
MyController controller = new MyController(options);

Upvotes: 122

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