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MetaMask Test Dapp

This is a simple test dapp for use in MetaMask e2e tests and manual QA.

Currently hosted here.

Usage

If you wish to use this dapp in your e2e tests, install this package and set up a script of e.g. the following form:

static-server node_modules/@metamask/test-dapp/dist --port 9011

The main page of the test dapp includes a simple UI featuring buttons for common dapp interactions.

There is a second page (request.html) that allows making requests directly to the provider using query parameters. This provides a simple way of testing RPC methods using an in-page provider.

It can be used by navigating to /request.html?method=${METHOD}&params=${PARAMS} (e.g. /request.html?method=eth_getLogs&params=[{ "address": "0x0000000000000000000000000000000000000000" }]). The page will make a request with the given RPC method and parameters using ethereum.request, and report the result as plain text.

Contributing

Setup

  • Install Node.js version 16
    • If you are using nvm (recommended) running nvm use will automatically choose the right node version for you.
  • Install Yarn v1
  • Run yarn setup to install dependencies and run any required post-install scripts
    • Warning: Do not use the yarn / yarn install command directly. Use yarn setup instead. The normal install command will skip required post-install scripts, leaving your development environment in an invalid state.

Testing and Linting

Run yarn lint to run the linter, or run yarn lint:fix to run the linter and fix any automatically fixable issues.

This package has no tests.

Deploying

After merging or pushing to main, please run yarn deploy in the package root directory if the contents of the dist/ directory have changed.

Development

Elements Must Be Selectable by XPath

All HTML elements should be easily selectable by XPath. This means that appearances can be misleading. For example, consider this old bug:

<button
  class="btn btn-primary btn-lg btn-block mb-3"
  id="approveTokensWithoutGas"
  disabled
>
  Approve Tokens Without Gas
</button>

This appears on the page as Approve Tokens Without Gas. In reality, the value included the whitespace on the second line, and caused XPath queries for the intended value to fail.