This library colocates test files with implementations. This means that for src/index.js you will find a src/index.test.js that tests the former.

The test directory contains general test setup, utils and fixtures (data used for testing):

• test/mocha.opts is a convention file loaded by mocha for specifying the command line arguments. We tell it to require
• test/setup.js, which will call babel-register with a babel-plugin that overwrites node's builtin assert functionality with power-assert.
• test/passing-configs are example real world webpack configs, for which we know they should be valid. They are used as test data in src/index.test.js.
• test/utils provides test utility functions.