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node_test.js
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node_test.js
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// Rust C-ABI library template - Node.js test harness
//
// Copyright (c) 2017 Sean Bolton
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
const assert = require('assert');
const ffi = require('ffi'); // https://github.com/node-ffi/node-ffi/wiki/Node-FFI-Tutorial
const ref = require('ref'); // https://tootallnate.github.io/ref/
const StructType = require('ref-struct'); // https://github.com/TooTallNate/ref-struct
const CallResult = StructType({
'status': 'int32',
'text': 'string'
});
const CallResultPtr = ref.refType(CallResult);
const rustlib = ffi.Library('target/debug/librust_c_abi_library_template', {
rust_function: [CallResultPtr, ['string']],
free_result: ['void', [CallResultPtr]],
});
function get_result(request) {
const result = rustlib.rust_function(request);
try {
return { status: result.deref().status, text: result.deref().text };
} finally {
rustlib.free_result(result);
}
}
result = get_result('success');
console.log("call with 'success' returned (" + result.status + ", '" + result.text + "')");
assert.equal(result.status, 0);
assert.equal(result.text, 'Success!');
result = get_result('failure');
console.log("call with 'failure' returned (" + result.status + ", '" + result.text + "')");
assert.equal(result.status, 1);
assert.equal(result.text, 'Failure :(');
result = get_result('panic');
console.log("call with 'panic' returned (" + result.status + ", '" + result.text + "')");
assert.equal(result.status, 2);
assert.equal(result.text, 'I have no towel');