How can I reset an EF7 InMemory provider between unit tests?

Question

I am trying to use the EF7 InMemory provider for unit tests, but the persistent nature of the InMemory database between tests is causing me problems.

The following code d

Answer 1

Here is my 2 cent approach to keep each unit test isolated from each other. I am using C# 7, XUnit and EF core 3.1.

Sample TestFixture class.

public class SampleIntegrationTestFixture : IDisposable
    {

        public DbContextOptionsBuilder SetupInMemoryDatabase()
            => new DbContextOptionsBuilder().UseInMemoryDatabase("MyInMemoryDatabase");

 private IEnumerable CreateStudentStub()
            => new List
            {
            new Student { Id = rng.Next(1,10000), Name = "Able" },
            new Student { Id = rng.Next(1,10000), Name = "Bob" }
            };

        public void Dispose()
        {
        }
   }

Sample IntegrationTest class

 public class SampleJobIntegrationTest : IClassFixture
 {
    private DbContextOptionsBuilder DbContextBuilder { get; }
    private SampleDbContext SampleDbContext { get; set; }

 public SampleJobIntegrationTest(SampleIntegrationTestFixture 
 sampleIntegrationTestFixture )
  {
        SampleIntegrationTestFixture = sampleIntegrationTestFixture ;

        SampleDbContextBuilder = sampleIntegrationTestFixture .SetupInMemoryDatabase();
  }



  [Fact]
    public void TestMethod1()
    {
using(SampleDbContext = new SampleDbContext(SampleDbContextBuilder.Options))

        var students= SampleIntegrationTestFixture.CreateStudentStub();
            {
            SampleDbContext.Students.AddRange(students);

        SampleDbContext.SaveChanges();

  Assert.AreEqual(2, _context.Students.ToList().Count());

                SampleDbContext.Database.EnsureDeleted();
            }
      
    }