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DocumentationGrafana k6JavaScript APIk6/browserPagesetInputFiles(selector, file[, options])
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setInputFiles(selector, file[, options])

Sets the file input element’s value to the specified files.

To work with local files on the file system, use the experimental fs module to load and read the file contents.

ParameterTypeDefaultDescription
selectorstring''A selector to search for an element. If there are multiple elements satisfying the selector, the first will be used.
fileobjectnullThis is a required parameter.
file.namestring''The name of the file. For example, file.txt.
file.mimeTypestring''The type of the file content. For example, text/plain.
file.bufferArrayBuffer[]Base64 encoded content of the file.
optionsobjectnullThis is an optional parameter.
options.noWaitAfterbooleanfalseIf set to true and a navigation occurs from performing this action, it will not wait for it to complete.
options.timeoutnumber30000Maximum time in milliseconds. Pass 0 to disable the timeout. Default is overridden by the setDefaultTimeout option on BrowserContext or Page.

Returns

TypeDescription
Promise<void>A Promise that fulfills when the file has been set.

Inline File Example

JavaScript
import { browser } from 'k6/browser';
import encoding from 'k6/encoding';

export const options = {
  scenarios: {
    browser: {
      executor: 'shared-iterations',
      options: {
        browser: {
          type: 'chromium',
        },
      },
    },
  },
};

export default async function () {
  const page = await browser.newPage();

  try {
    // In this example we create a simple web page with an upload input field.
    // Usually, you would use page.goto to navigate to a page with a file input field.
    await page.setContent(`
      <html>
        <head></head>
        <body>
            <!-- Simple file upload form -->
            <form method="POST" action="/upload" enctype="multipart/form-data">
                <input type="file" id="upload" multiple />
                <input type="submit" value="Send" />
            </form>
        </body>
      </html>`);

    // The file is set to the input element with the id "upload".
    await page.setInputFiles('input[id="upload"]', {
      name: 'file.txt',
      mimetype: 'text/plain',
      buffer: encoding.b64encode('hello world'),
    });
  } finally {
    await page.close();
  }
}

Local File Example

JavaScript
import { browser } from 'k6/browser';
import encoding from 'k6/encoding';
import { open } from 'k6/experimental/fs';

export const options = {
  scenarios: {
    ui: {
      executor: 'shared-iterations',
      options: {
        browser: {
          type: 'chromium',
        },
      },
    },
  },
};

// Declare the location of the file on the local filesystem.
let file;
(async function () {
  file = await open('/abs/path/to/file.txt');
})();

export default async function () {
  const page = await browser.newPage();

  try {
    // In this example we create a simple web page with an upload input field.
    // Usually, you would use page.goto to navigate to a page with a file input field.
    page.setContent(`
      <html>
        <head></head>
        <body>
            <!-- Simple file upload form -->
            <form method="POST" action="/upload" enctype="multipart/form-data">
                <input type="file" id="upload" multiple />
                <input type="submit" value="Send" />
            </form>
        </body>
      </html>`);

    // Read the whole file content into a buffer.
    const buffer = await readAll(file);

    // The file is set to the input element with the id "upload".
    await page.setInputFiles({
      name: 'file.txt',
      mimetype: 'text/plain',
      buffer: encoding.b64encode(buffer),
    });
  } finally {
    await page.close();
  }
}

// readAll will read the whole of the file from the local filesystem into a
// buffer.
async function readAll(file) {
  const fileInfo = await file.stat();
  const buffer = new Uint8Array(fileInfo.size);

  const bytesRead = await file.read(buffer);
  if (bytesRead !== fileInfo.size) {
    throw new Error('unexpected number of bytes read');
  }

  return buffer;
}