brokentone / eslint-plugin-chai-expect

ESLint plugin that checks for common chai.js expect() mistakes

eslint-plugin-chai-expect

ESLint plugin that checks for common chai.js expect() mistakes

Installation

npm install --save-dev eslint-plugin-chai-expect

Configuration

Add a plugins section and specify chai-expect as a plugin:

{
  "plugins": [
    "chai-expect"
  ]
}

Enable the rules that you would like to use:

{
  "rules": {
    "chai-expect/missing-assertion": 2,
    "chai-expect/terminating-properties": 1
  }
}

Rules

• no-inner-compare - Prevent using comparisons in the expect() argument
• missing-assertion - Prevent calling expect(...) without an assertion like .to.be.ok
• terminating-properties - Prevent calling to.be.ok and other assertion properties as functions

Additional configuration

terminating-properties rule

A number of extenstions to chai add additional terminating properties. For example chai-http adds:

• headers
• html
• ip
• json
• redirect
• text

The terminating-properties rule can be configured to ensure these (or other) additional properties are not used as functions:

{
  "rules": {
    "chai-expect/terminating-properties": ["error", {
      "properties": ["headers", "html", "ip", "json", "redirect", "test"]
    }]
  }
}

License

eslint-plugin-chai-expect is licensed under the MIT License.