public void AddManagerShouldAdd()
{
//arrange
var options = new DbContextOptionsBuilder <SoilMatesContext>().UseInMemoryDatabase("AddManagerShouldAdd").Options;
using var testContext = new SoilMatesContext(options);
repo = new DBrepo(testContext);
//act
repo.AddManager(testManager);
//assert
using var assertContext = new SoilMatesContext(options);
Assert.NotNull(assertContext.Managers.SingleAsync(n => n.Name == testManager.Name));
}
