c# - NUnit: Unit Testing Entity Framework ViewModel in WPF MVVM? -

c# - NUnit: Unit Testing Entity Framework ViewModel in WPF MVVM? -

i'm getting started absolute basics of unit testing. i've used beginners tutorial nunit beginners guide guide.

here's test viewmodel has 1 method performs linq query ef. class in same project application now.

namespace diientitlements.tests { [testfixture] public class entitlementsviewmodeltests : notifypropertybase { entitlemententities _context = new entitlemententities(); private observablecollection<vwaccountheader> _accountheadercollection; public observablecollection<vwaccountheader> accountheadercollection { { homecoming _accountheadercollection; } set { _accountheadercollection = value; onpropertychanged("accountheadercollection"); } } [test] public void getaccountheaders() { var query = in _context.vwaccountheaders select a; accountheadercollection = new observablecollection<vwaccountheader>(query); } }

when run test in nunit next exception:

"no connection string named 'entitlemententities' found in application config file"

now presumably because .nunit test file can't access app.config connection string within project?

is there work around & best approach or should mocking db testing?

you're getting error because don't have connection string unit testing project.

as mocking, depends on want; usually, on unit testing, test business code , mock integration points(database, web services , on). if need test whole flow, presentation layer database, have integration testing, , don't need mock.

hope helps.

c# wpf entity-framework unit-testing mvvm