Sam Bankman-Fried got a test run taking the stand at his New York criminal trial on Thursday, after a judge sent jurors home but let him demonstrate portions of his testimony before deciding what parts of it he’ll allow. The defendant is expected to face the jury on Friday when he testifies about his version of how his multibillion-dollar cryptocurrency empire grew into a giant in the industry and then collapsed, causing billions of dollars in losses that prosecutors blame on his extravagant spending on investments, donations and a lavish lifestyle. During nearly three hours of testimony on Th…