import assert from 'assert' import util from 'util' const fail = assert.fail; function truncate(s, n) { return s.length < n ? s : s.slice(0, n) + '...'; } function stringifyObject(data) { if (typeof(data) !== 'string') { data = util.inspect( data, { depth: 1 } ) .replace(/\n /g, ''); } return truncate(data, 64); } assert.notOk = (value, message) => { if (Boolean(value)) { assert.equal(value, false, message) } } assert.match = (value, test, message) => { let result = value.match(test); if (result) return; let m = message if (!m) { m = `${value} did not match ${test}` } fail(m); } assert.notMatch = (value, test, message) => { let result = value.match(test); if (!result) return; let m = message if (!m) { m = `${value} matched ${test}` } fail(m); } assert.isFulfilled = (promise, message) => { return Promise.resolve(true) .then(() => promise) .catch((err) => { let m = message if (!m) { m = `promise failed with ${err.message || stringifyObject(err)}`; } fail(m); }); } assert.isRejected = (promise, message) => { let hasFailed = false; return Promise.resolve(true) .then(() => promise) .catch((data) => { hasFailed = true; return data; }) .then((data) => { if (hasFailed) return data; let m = message if (!m) { m = `promise was fulfilled with ${stringifyObject(data)}`; } fail(m); }); } export default assert