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const generate = require('babel-generator').default;

module.exports = function({types: t}) {

return {

name: 'assert-messages',

visitor: {

CallExpression(path, state) {

// assuming `assert.something(arg1, arg2)`

// assert.something

const callee = path.node.callee;

if (!t.isMemberExpression(callee)) { return; }

if (!t.isIdentifier(callee.object, {name: 'assert'})) { return; }

if (t.isIdentifier(callee.property, {name: 'isRejected'})) { return; }

if (!t.isIdentifier(callee.property)) { return; }

try {

const code = generate(path.node).code;

path.node.arguments.push(t.stringLiteral(code));

} catch (err) {

// nothing

}

};