This directory contains tests for the core WebAssembly semantics, as described in Semantics.md and specified by the spec interpreter.

Tests are written in the S-Expression script format defined by the interpreter.

The test suite can be run with the spec interpreter as follows:

./run.py --wasm <path-to-wasm-interpreter>

where the path points to the spec interpreter executable (or a tool that understands similar options). If the binary is in the working directory, this option can be omitted.

In addition, the option --js <path-to-js-interpreter> can be given to point to a stand-alone JavaScript interpreter supporting the WebAssembly API. If provided, all tests are also executed in JavaScript.