cypress - check if log message was recorded

logAssert.spec.js

const spyConsoleLog = () => {
  let logs = [];
  const findLog = fragment => logs.find(message => (message + "").indexOf(fragment) >= 0);
  Cypress.on("window:before:load", win => {
    let clog = win.console.log;
    win.console.log = (...arg) => {
      logs.push(arg.join(" "));
      clog.apply(console, arg);
    };
  });
  return {
    logs,
    findInLogs,
  };
};

///
// use in cypress...

it("checks logs", () => {
  let { findInLogs } = spyConsoleLog();
  cy.wait("@somestuff");
  expect(findInLogs("my message chunk")).to.not.be.undefined;
})