gplint/build/rules/no-duplicate-tags.js

A Gherkin linter/validator written in Javascript.

import _ from 'lodash';
import { featureSpread } from './utils/gherkin.js';
export const name = 'no-duplicate-tags';
export function run({ feature }) {
    if (!feature) {
        return [];
    }
    const errors = [];
    verifyTags(feature, errors);
    const { children, rules } = featureSpread(feature);
    rules.forEach(rule => {
        verifyTags(rule, errors);
    });
    children.forEach(child => {
        if (child.scenario) {
            verifyTags(child.scenario, errors);
            child.scenario.examples.forEach(example => {
                verifyTags(example, errors);
            });
        }
    });
    return errors;
}
function verifyTags(node, errors) {
    const failedTagNames = [];
    const uniqueTagNames = [];
    node.tags.forEach(tag => {
        if (!_.includes(failedTagNames, tag.name)) {
            if (_.includes(uniqueTagNames, tag.name)) {
                errors.push({
                    message: `Duplicate tags are not allowed: ${tag.name}`,
                    rule: name,
                    line: tag.location.line,
                    column: tag.location.column,
                });
                failedTagNames.push(tag.name);
            }
            else {
                uniqueTagNames.push(tag.name);
            }
        }
    });
}
export const documentation = {
    description: 'Disallows duplicate tags on the same Feature or Scenario.',
    examples: [{
            title: 'Example',
            description: 'Enable rule',
            config: {
                [name]: 'error',
            }
        }],
};
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