rust-enforce

执行 Rust 中的流体断言 例子 使用来测试语法 describe ! vec { describe ! push { before_each { let mut v = vec! [1u, 2 , 3 ]; } it "should increase the length by 1" { let old = v. len (); v. push (4u); // Fluid chain with informative error messages. ( enforce! (old + 1 )). is (). equal (v. len ()); } it "should add