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'use strict';
require('../common');
const assert = require('assert');
const vm = require('vm');
const Buffer = require('buffer').Buffer;
function getSource(tag) {
return `(function ${tag}() { return \'${tag}\'; })`;
}
function produce(source) {
const script = new vm.Script(source, {
produceCachedData: true
});
assert(!script.cachedDataProduced || script.cachedData instanceof Buffer);
return script.cachedData;
}
function testProduceConsume() {
const source = getSource('original');
const data = produce(source);
// It should consume code cache
const script = new vm.Script(source, {
cachedData: data
});
assert(!script.cachedDataRejected);
assert.equal(script.runInThisContext()(), 'original');
}
testProduceConsume();
function testProduceMultiple() {
const source = getSource('original');
produce(source);
produce(source);
produce(source);
}
testProduceMultiple();
function testRejectInvalid() {
const source = getSource('invalid');
const data = produce(source);
// It should reject invalid code cache
const script = new vm.Script(getSource('invalid_1'), {
cachedData: data
});
assert(script.cachedDataRejected);
assert.equal(script.runInThisContext()(), 'invalid_1');
}
testRejectInvalid();
function testRejectSlice() {
const source = getSource('slice');
const data = produce(source).slice(4);
const script = new vm.Script(source, {
cachedData: data
});
assert(script.cachedDataRejected);
}
testRejectSlice();
// It should throw on non-Buffer cachedData
assert.throws(() => {
new vm.Script('function abc() {}', {
cachedData: 'ohai'
});
});