I have this error message :
An error was generated for warning 'Microsoft.EntityFrameworkCore.Infrastructure.ManyServiceProvidersCreatedWarning': More than twenty 'IServiceProvider' instances have been created for internal use by Entity Framework. This is commonly caused by injection of a new singleton service instance into every DbContext instance. For example, calling 'UseLoggerFactory' passing in a new instance each time--see https://go.microsoft.com/fwlink/?linkid=869049 for more details. This may lead to performance issues, consider reviewing calls on 'DbContextOptionsBuilder' that may require new service providers to be built. This exception can be suppressed or logged by passing event ID 'CoreEventId.ManyServiceProvidersCreatedWarning' to the 'ConfigureWarnings' method in 'DbContext.OnConfiguring' or 'AddDbContext'.
When I run all Unit Test together
Setup
private readonly DbContextOptions<ApplicationDbContext> _contextOptions;
private readonly DbContextOptions<ApplicationDbContext> _inMemoryContextOptions;
public TestConstructor()
{
// Test for real database READ
_contextOptions = new DbContextOptionsBuilder<ApplicationDbContext>()
.UseSqlServer(_connectionString)
.Options;
// Test InMemory CREATE UPDATE DELETE
_inMemoryContextOptions = DbContextOptionsBuilder();
SeedInMemoryTestDb(_inMemoryContextOptions);
}
private static DbContextOptions<ApplicationDbContext> DbContextOptionsBuilder()
{
return new DbContextOptionsBuilder<ApplicationDbContext>()
.UseInMemoryDatabase(Guid.NewGuid().ToString(),new InMemoryDatabaseRoot())
.Options;
}
Unit Test
[FACT]
public void Test1()
await using var context = new ApplicationDbContext(_contextOptions);
//... Assert.Equal()
[FACT]
public void Test2()
await using var context = new ApplicationDbContext(_inMemoryContextOptions);
//... Assert.Equal()
I have both Setup and Unit Test in 5 or 6 class.
I think I need to re-use the same context for every test but I don't achieve to do that.
question from:
https://stackoverflow.com/questions/65860753/more-than-twenty-iserviceprovider-unit-test 与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…