eslint-plugin-jest/lib/rules/no-truthy-falsy.js

Eslint rules for Jest

'use strict';

const _require = require('./util'),
      getDocsUrl = _require.getDocsUrl,
      expectCase = _require.expectCase,
      expectNotCase = _require.expectNotCase,
      expectResolveCase = _require.expectResolveCase,
      expectRejectCase = _require.expectRejectCase,
      method = _require.method;

module.exports = {
  meta: {
    docs: {
      url: getDocsUrl(__filename)
    },
    messages: {
      avoidMessage: 'Avoid {{methodName}}'
    }
  },

  create(context) {
    return {
      CallExpression(node) {
        if (expectCase(node) || expectNotCase(node) || expectResolveCase(node) || expectRejectCase(node)) {
          const targetNode = node.parent.parent.type === 'MemberExpression' ? node.parent : node;
          const methodNode = method(targetNode);
          const methodName = methodNode.name;

          if (methodName === 'toBeTruthy' || methodName === 'toBeFalsy') {
            context.report({
              data: {
                methodName
              },
              messageId: 'avoidMessage',
              node: methodNode
            });
          }
        }
      }

    };
  }

};