I am trying to mock MySqlConnection using Moq. and it is throwing the below error
System.NotSupportedException: 'Type to mock (MySqlConnection) must be an interface, a delegate, or a non-sealed, non-static class.'
Is there any way to mock the MySqlConnection without changing the code I am trying to write the unit test for?
You can create an in memory database to mock the application database context and add test data to the in memory db for testing.
Please refer the below code.
// Create in memory database
private readonly ApplicationDbContext _dbContext;
// In the constructor
public ClassConstructor()
{
dbContext = CreateInMemoryDatabase("InMemory_DB");
SetupMockData();
}
private static ApplicationDbContext CreateInMemoryDatabase(string databaseName)
{
var options = new DbContextOptionsBuilder<ApplicationDbContext>()
.UseInMemoryDatabase(databaseName: $"{databaseName}_{Guid.NewGuid()}")
.ConfigureWarnings(x => x.Ignore(InMemoryEventId.TransactionIgnoredWarning))
.Options;
var context = new ApplicationDbContext(options);
context.Database.EnsureDeleted();
context.Database.EnsureCreated();
return context;
}
// Add the mock data
private void SetupMockData()
{
_dbContext.AddAsync(new Entity
{
Id = 1,
Name = "Name"
});
_dbContext.SaveChanges();
}
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