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test: verify that WASI errors are rethrown

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This commit adds a test to verify that exceptions thrown from a
WASI application are properly caught and rethrown. This also
gets the code coverage in lib/wasi.js back to 100%.

PR-URL: https://github.com/nodejs/node/pull/32157
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
This commit is contained in:
cjihrig 2020-03-09 11:20:45 -04:00
parent 605615e5f3
commit ec204d86b0
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GPG Key ID: 7434390BDBE9B9C5
1 changed files with 15 additions and 2 deletions
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17
test/wasi/test-return-on-exit.js
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@ -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());