Cloudflare worker header tests

index.js

const axios = require('axios');
const process = require('process');

const expectedHeaders = [
  {
    name: "Strict-Transport-Security",
    value: "max-age=63072000"
  },
  {
    name: "X-Frame-Options",
    value: "DENY"
  },
  {
    name: "X-Content-Type-Options",
    value: "nosniff"
  }, 
  {
    name: "X-XSS-Protection",
    value: "1; mode=block"
  },
  {
    name: "Referrer-Policy",
    value: "strict-origin-when-cross-origin"
  }
]

let missingHeaders = [];
let incorrectHeaders = [];

axios.get("TEST URL")
.then(function(response) {
  // we won't get a 'then' because Clouflare will return a 5xx error
})
.catch(function(error) {
  // but that's okay because we can still check if the headers are present
  // get response headers
  let headers = error.response.headers;
  // get list of header names in upper case from response
  let headerKeys = Object.keys(headers).map(element => {return element.toUpperCase()});
  // build an associatve array of headers with keys in upper case
  headers = Object.keys(headers).reduce((acc, element) => {
    acc[element.toUpperCase()] = headers[element];
    return acc;
  }, []);
  // check all headers are present
  expectedHeaders.forEach(element => {
    console.log("Checking for header", element.name, "with value:", element.value);
    if(headerKeys.includes(element.name.toUpperCase())) {
      console.log("  -> header is present");
      // check value of header is correct
      if(headers[element.name.toUpperCase()] === element.value) {
        console.log("  -> value is correct");
      } else {
        console.log("  -> value is not correct, expected", element.value, "found", headers[element.name.toUpperCase()]);
        incorrectHeaders.push(element.name);
      }
    } else {
      console.log("  -> header is missing");
      missingHeaders.push(element.name);
    }
  });
  // check final results
  console.log(" ");
  if(missingHeaders.length === 0 && incorrectHeaders == 0) {
    console.log(" *** No issues found ***");
  } else {
    console.log(" *** Issues found ***");
    console.log("  -> missing headers", missingHeaders);
    console.log("  -> incorrect headers", incorrectHeaders);
    process.exit(1);
  }
});