babel/packages/babel-plugin-transform-arrow-functions/test/fixtures/arrow-functions/self-referential/exec.js

var fooCalls = []
var jumpTable = (name, arg) => { if (jumpTable[name]) { jumpTable[name](arg) } }
Object.assign(jumpTable, { foo (arg) { fooCalls.push(arg) } });
jumpTable('foo', 'bar')

expect(fooCalls[0]).toBe('bar');