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test: verify that WASI errors are rethrown #32157

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Mar 13, 2020
Merged

test: verify that WASI errors are rethrown #32157

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17 changes: 15 additions & 2 deletions test/wasi/test-return-on-exit.js
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Original file line number Diff line number Diff line change
Expand Up @@ -5,14 +5,27 @@ const assert = require('assert');
const fs = require('fs');
const path = require('path');
const { WASI } = require('wasi');
const wasi = new WASI({ returnOnExit: true });
const importObject = { wasi_snapshot_preview1: wasi.wasiImport };
const wasmDir = path.join(__dirname, 'wasm');
const modulePath = path.join(wasmDir, 'exitcode.wasm');
const buffer = fs.readFileSync(modulePath);

(async () => {
const wasi = new WASI({ returnOnExit: true });
const importObject = { wasi_snapshot_preview1: wasi.wasiImport };
const { instance } = await WebAssembly.instantiate(buffer, importObject);

assert.strictEqual(wasi.start(instance), 120);
})().then(common.mustCall());

(async () => {
// Verify that if a WASI application throws an exception, Node rethrows it
// properly.
const wasi = new WASI({ returnOnExit: true });
wasi.wasiImport.proc_exit = () => { throw new Error('test error'); };
const importObject = { wasi_snapshot_preview1: wasi.wasiImport };
const { instance } = await WebAssembly.instantiate(buffer, importObject);

assert.throws(() => {
wasi.start(instance);
}, /^Error: test error$/);
})().then(common.mustCall());