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Should you mock a database?
Mocking is a very effective and popular way to remove this dependency from your tests. The database or data access layer could have defects which could give you false positives or false negatives in your test results. The database might not be ready for testing as it could be lagging behind the code.
Should you Unit Test Data Access Layer?
It is a good practice to write unit test for every layer, even the DAL. I don’t think running tests on the real db is a good idea, you might ruin important data. We used to set up a copy of the db for tests with just enough data in it to run tests on.
Do unit tests touch the database?
Unit tests should never connect to a database. By definition, they should test a single unit of code each (a method) in total isolation from the rest of your system.
How to write unit tests for data access layer?
This is one of the easiest ways to write Unit Tests for the Data Access Layer code using MOQ Framework and without creating a new test database. Organizations are now using Continuous Integration and Continuous Deployment (CI/CD) to release projects faster.
What’s the best way to mock a database?
Maybe using a DAO pattern to easily switch between real and in-memory. Keep the actual database interaction layer thin as possible to ensure you abstract your logic away in separate classes, this makes testing much easier, as in this case you can mock the DB object and focus on testing your logic.
How to create mock dbsets in Moq framework?
DBset MockCustomers =getMoqDBset (DataList, x=> x. CustomerID).object; After creating mocked DBSets for all required models that need to be subjected to the Unit Test process, create the mocked DBContext class again using the MOQ Framework.
How to write unit tests with Moq framework?
To be able to write unit tests we need to define few support classes as some of the classes can’t be mocked with Moq framework (they are internal classes, etc. Sample class that can’t be mocked: SqlParameterCollection) MockDataReader (most of the methods are not implemented. I implemented only necessary methods):