How to mock a 100mb file using mocha?

@ryan.murray 

To mock a 100mb file using mocha, you can create a fake file with a specific size using a library like faker in a before hook in your test file. Here's an example of how you can do this:

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const fs = require('fs');
const faker = require('faker');

describe('Test Suite', () => {

  before(() => {
    // Generate a fake 100mb file
    const fileSize = 100 * 1024 * 1024; // 100mb in bytes
    const fakeData = faker.random.words(fileSize);

    // Write the fake data to a file
    fs.writeFileSync('mockFile.txt', fakeData);
  });

  it('should test something with the mock file', () => {
    // Your test code here
  });

  after(() => {
    // Clean up the mock file
    fs.unlinkSync('mockFile.txt');
  });

});

In this example, we use faker to generate a large string of fake data that is equivalent to a 100mb file size. We then write this fake data to a file called mockFile.txt in the before hook. After the tests are completed, we clean up by deleting the mock file in the after hook.

You can then use mockFile.txt in your tests to mock a 100mb file. Remember to adjust the file size to your desired size and change the file format if needed.