public void Dispatches_visitor()
{
var createSequenceOperation = new CreateSequenceOperation(new Sequence("dbo.MySequence"));
var mockVisitor = new Mock<MigrationOperationSqlGenerator>(new RelationalTypeMapper());
var builder = new Mock<IndentedStringBuilder>();
createSequenceOperation.GenerateSql(mockVisitor.Object, builder.Object);
mockVisitor.Verify(g => g.Generate(createSequenceOperation, builder.Object), Times.Once());
}
