public void EnsureInitialization_OnlyRunsOnce()
{
//Arrange
_serviceBuilderMock.Protected()
.Setup("Setup", ItExpr.IsAny <IConfiguration>())
.Verifiable("This method should only have been called once.");
_serviceBuilderMock.Protected();
IServiceBuilder serviceBuilder = _serviceBuilderMock.Object;
//Act
for (var i = 0; i < 2; i++)
{
serviceBuilder.EnsureInitialization();
}
//Assert
_serviceBuilderMock.Protected()
.Verify("Setup", Times.Once(), ItExpr.IsAny <IConfiguration>());
}