eslint-plugin-lob/lib/rules/newline-after-mocha.js

Custom ESLint rules for Lob repositories

'use strict';

var ERROR_MESSAGE = 'It and describe blocks must be separated by new lines.';

function isMochaCall (node) {
  return node.callee.name === 'it' ||
    node.callee.name === 'describe' ||
    node.callee.name === 'beforeEach' ||
    node.callee.name === 'afterEach' ||
    node.callee.name === 'before' ||
    node.callee.name === 'after';
}

function isLastNode (node) {
  return node.parent.body[node.parent.body.length - 1] === node;
}

module.exports = {
  meta: {
    type: 'layout',
    schema: []
  },
  create (ctx) {
    return {
      CallExpression (node) {
        var sourceCode = ctx.sourceCode;
        var statement = node.parent;

        if (!isMochaCall(node)) {
          return;
        }

        if (isLastNode(statement)) {
          return;
        }

        var lastToken = sourceCode.getLastToken(statement);
        var nextToken = sourceCode.getTokenAfter(statement);
        var expectedNextLineNum = lastToken.loc.end.line + 1;
        var hasNewLine = nextToken.loc.start.line > expectedNextLineNum;

        if (!hasNewLine) {
          ctx.report({ node, message: ERROR_MESSAGE, data: { identifier: node.name } });
        }
      }
    };
  }
};