AS-Covers core

Convenience package for AssemblyScript coverage. It installs the helper declarations, transform, and Node.js glue packages, and re-exports the glue API from @as-covers/glue.

Install

npm install --save-dev @as-covers/core assemblyscript @assemblyscript/loader

Compile with coverage

npx asc ./assembly/index.ts \
  --lib ./node_modules/@as-covers/assembly/index.ts \
  --transform ./node_modules/@as-covers/transform/lib/index.js \
  --outFile ./build/coverage.wasm \
  --exportStart _start

Replace ./assembly/index.ts with your test entry file. The --lib path comes from @as-covers/assembly; the transform path comes from @as-covers/transform.

Covers reads declared source-file strings through the @assemblyscript/loader string helpers, so instantiate with @assemblyscript/loader or provide equivalent exports.__getString support in a custom loader.

Run and report

import fs from "node:fs";
import loader from "@assemblyscript/loader";
import { Covers } from "@as-covers/core";

const covers = new Covers();
const wasmModule = loader.instantiateSync(
  fs.readFileSync("./build/coverage.wasm"),
  covers.installImports({})
);

covers.registerLoader(wasmModule);
wasmModule.exports._start();

process.stdout.write(covers.stringify());

This repository verifies the packed-package flow with:

npm run test:package

License

MIT. See LICENSE.