How to construct files under the `ever-vm/src/tests` directory

[Taolaw]

As the title suggests, I want to compile the files under the ever-vm/src/tests directory to understand some implementations of TVM. However, I couldn't find the Cargo.toml file in the tests directory, and the upper-level Cargo.toml file also doesn't compile the contents of this directory. This has left me confused.

[bvscd]

These are unit tests that do not require any additional manifest file.
Just run cargo test command