eslint-config-chain-able
Version:
an opinionated ESLint configuration
107 lines (80 loc) • 2.64 kB
JavaScript
;
/* $FlowFixMe */
const describeAliases = Object.assign(Object.create(null), {
describe: true,
'describe.only': true,
'describe.skip': true,
fdescribe: true,
xdescribe: true });
/* $FlowFixMe */ /**
* Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
*
*/const testCaseNames = Object.assign(Object.create(null), { fit: true, it: true, 'it.only': true, 'it.skip': true, test: true, 'test.only': true, 'test.skip': true,
xit: true,
xtest: true });
const getNodeName = node => {
if (node.type === 'MemberExpression') {
return node.object.name + '.' + node.property.name;
}
return node.name;
};
const isDescribe = node =>
node &&
node.type === 'CallExpression' &&
describeAliases[getNodeName(node.callee)];
const isTestCase = node =>
node &&
node.type === 'CallExpression' &&
testCaseNames[getNodeName(node.callee)];
const newDescribeContext = () => ({
describeTitles: [],
testTitles: [] });
const handleTestCaseTitles = (context, titles, node, title) => {
if (isTestCase(node)) {
if (titles.indexOf(title) !== -1) {
context.report({
message: 'Test title is used multiple times in the same test suite.',
node });
}
titles.push(title);
}
};
const handleTestSuiteTitles = (context, titles, node, title) => {
if (!isDescribe(node)) {
return;
}
if (titles.indexOf(title) !== -1) {
context.report({
message: 'Test suite title is used multiple times.',
node });
}
titles.push(title);
};
const isFirstArgLiteral = node =>
node.arguments && node.arguments[0] && node.arguments[0].type === 'Literal';
module.exports = context => {
const contexts = [newDescribeContext()];
return {
CallExpression(node) {
const currentLayer = contexts[contexts.length - 1];
if (isDescribe(node)) {
contexts.push(newDescribeContext());
}
if (!isFirstArgLiteral(node)) {
return;
}
const title = node.arguments[0].value;
handleTestCaseTitles(context, currentLayer.testTitles, node, title);
handleTestSuiteTitles(context, currentLayer.describeTitles, node, title);
},
'CallExpression:exit'(node) {
if (isDescribe(node)) {
contexts.pop();
}
} };
};