add tests for Rem, BitAnd, BitOr, BitXor, Shl, and Shr
add tests for Rem, BitAnd, BitOr, BitXor, Shl, and Shr

aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust