Configuration

Main config file: as-test.config.json

Minimal example:

{
  "input": ["assembly/__tests__/*.spec.ts"],
  "output": ".as-test/",
  "buildOptions": {
    "target": "wasi"
  },
  "runOptions": {
    "runtime": {
      "cmd": "node .as-test/runners/default.wasi.js <file>"
    }
  }
}

Important fields:

• input: spec file globs
• output: root output directory, or an object with explicit output paths
• env: environment variables passed to build and runtime processes
• buildOptions.target: wasi, bindings, or web
• buildOptions.cmd: optional custom build command template
• runOptions.runtime.cmd: runtime command template
• runOptions.reporter: reporter selection
• modes: named mode overrides selected with --mode

Fuzz config:

{
  "fuzz": {
    "input": ["assembly/__fuzz__/*.fuzz.ts"],
    "runs": 1000,
    "seed": 1337,
    "target": "bindings",
    "corpusDir": ".as-test/fuzz/corpus",
    "crashDir": ".as-test/crashes"
  }
}

Current fuzz fields:

• fuzz.input
• fuzz.runs
• fuzz.seed
• fuzz.target
• fuzz.corpusDir
• fuzz.crashDir

Validation behavior:

• config parsing is strict
• unknown keys fail validation
• invalid types fail validation
• ast doctor is the fastest way to check config issues