Jest: How to load file stub?

Question

I have an image file I need to use in my tests. I need to pass this File object around and call certain methods on it.

const readTestFile = () =>
  new Promise((resolve, reject) => {
    fs.readFile(testFilePath, (err, data) => {
      if (err) return reject(err);
      const blob = new File(data, "file.png"); // <-------- doesn't work in NodeJS
      return resolve(blob);
    });
  });

How would I load it the "jest" way? Also I need a File object (not a string), how would I get around this?

Answer 1

Fixed this by changing:

testEnvironment: "node"

to

testEnvironment: "jsdom"