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node_modules/eslint-config-airbnb/test/test-react-order.js

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+import test from 'tape';
+import { CLIEngine } from 'eslint';
+import eslintrc from '..';
+import reactRules from '../rules/react';
+import reactA11yRules from '../rules/react-a11y';
+
+const cli = new CLIEngine({
+  useEslintrc: false,
+  baseConfig: eslintrc,
+
+  rules: {
+    // It is okay to import devDependencies in tests.
+    'import/no-extraneous-dependencies': [2, { devDependencies: true }],
+    // this doesn't matter for tests
+    'lines-between-class-members': 0,
+  },
+});
+
+function lint(text) {
+  // @see https://eslint.org/docs/developer-guide/nodejs-api.html#executeonfiles
+  // @see https://eslint.org/docs/developer-guide/nodejs-api.html#executeontext
+  const linter = cli.executeOnText(text);
+  return linter.results[0];
+}
+
+function wrapComponent(body) {
+  return `
+import React from 'react';
+
+export default class MyComponent extends React.Component {
+/* eslint no-empty-function: 0, class-methods-use-this: 0 */
+${body}
+}
+`;
+}
+
+test('validate react prop order', (t) => {
+  t.test('make sure our eslintrc has React and JSX linting dependencies', (t) => {
+    t.plan(2);
+    t.deepEqual(reactRules.plugins, ['react']);
+    t.deepEqual(reactA11yRules.plugins, ['jsx-a11y', 'react']);
+  });
+
+  t.test('passes a good component', (t) => {
+    t.plan(3);
+    const result = lint(wrapComponent(`
+  componentWillMount() {}
+  componentDidMount() {}
+  setFoo() {}
+  getFoo() {}
+  setBar() {}
+  someMethod() {}
+  renderDogs() {}
+  render() { return <div />; }`));
+
+    t.notOk(result.warningCount, 'no warnings');
+    t.notOk(result.errorCount, 'no errors');
+    t.deepEquals(result.messages, [], 'no messages in results');
+  });
+
+  t.test('order: when random method is first', (t) => {
+    t.plan(2);
+    const result = lint(wrapComponent(`
+  someMethod() {}
+  componentWillMount() {}
+  componentDidMount() {}
+  setFoo() {}
+  getFoo() {}
+  setBar() {}
+  renderDogs() {}
+  render() { return <div />; }
+`));
+
+    t.ok(result.errorCount, 'fails');
+    t.equal(result.messages[0].ruleId, 'react/sort-comp', 'fails due to sort');
+  });
+
+  t.test('order: when random method after lifecycle methods', (t) => {
+    t.plan(2);
+    const result = lint(wrapComponent(`
+  componentWillMount() {}
+  componentDidMount() {}
+  someMethod() {}
+  setFoo() {}
+  getFoo() {}
+  setBar() {}
+  renderDogs() {}
+  render() { return <div />; }
+`));
+
+    t.ok(result.errorCount, 'fails');
+    t.equal(result.messages[0].ruleId, 'react/sort-comp', 'fails due to sort');
+  });
+});