98 lines
3.2 KiB
JavaScript
98 lines
3.2 KiB
JavaScript
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// This has been tested with the real Ethereum network and Testrpc.
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// Copied and edited from: https://gist.github.com/xavierlepretre/d5583222fde52ddfbc58b7cfa0d2d0a9
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exports.assertReverts = (contractMethodCall, maxGasAvailable) => {
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return new Promise((resolve, reject) => {
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try {
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resolve(contractMethodCall())
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} catch (error) {
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reject(error)
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}
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})
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.then(tx => {
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assert.equal(tx.receipt.gasUsed, maxGasAvailable, "tx successful, the max gas available was not consumed")
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})
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.catch(error => {
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if ((error + "").indexOf("invalid opcode") < 0 && (error + "").indexOf("out of gas") < 0) {
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// Checks if the error is from TestRpc. If it is then ignore it.
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// Otherwise relay/throw the error produced by the above assertion.
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// Note that no error is thrown when using a real Ethereum network AND the assertion above is true.
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throw error
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}
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})
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}
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exports.listenForEvent = event => new Promise((resolve, reject) => {
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event({}, (error, response) => {
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if (!error) {
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resolve(response.args)
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} else {
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reject(error)
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}
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event.stopWatching()
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})
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});
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exports.eventValues = (receipt, eventName) => {
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if(receipt.events[eventName])
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return receipt.events[eventName].returnValues;
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}
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exports.addressToBytes32 = (address) => {
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const stringed = "0000000000000000000000000000000000000000000000000000000000000000" + address.slice(2);
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return "0x" + stringed.substring(stringed.length - 64, stringed.length);
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}
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// OpenZeppelin's expectThrow helper -
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// Source: https://github.com/OpenZeppelin/zeppelin-solidity/blob/master/test/helpers/expectThrow.js
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exports.expectThrow = async promise => {
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try {
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await promise;
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} catch (error) {
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// TODO: Check jump destination to destinguish between a throw
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// and an actual invalid jump.
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const invalidOpcode = error.message.search('invalid opcode') >= 0;
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// TODO: When we contract A calls contract B, and B throws, instead
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// of an 'invalid jump', we get an 'out of gas' error. How do
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// we distinguish this from an actual out of gas event? (The
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// testrpc log actually show an 'invalid jump' event.)
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const outOfGas = error.message.search('out of gas') >= 0;
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const revert = error.message.search('revert') >= 0;
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assert(
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invalidOpcode || outOfGas || revert,
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'Expected throw, got \'' + error + '\' instead',
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);
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return;
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}
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assert.fail('Expected throw not received');
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};
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exports.assertJump = (error) => {
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assert(error.message.search('revert') > -1, 'Revert should happen');
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}
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var callbackToResolve = function (resolve, reject) {
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return function (error, value) {
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if (error) {
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reject(error);
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} else {
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resolve(value);
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}
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};
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};
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exports.promisify = (func) =>
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(...args) => {
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return new Promise((resolve, reject) => {
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const callback = (err, data) => err ? reject(err) : resolve(data);
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func.apply(this, [...args, callback]);
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});
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}
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