[Tests] order/no-duplicates: make tests check actual eslint version instead of env var

Author: ljharb

tests/src/rules/no-duplicates.js

@@ -2,11 +2,14 @@ import * as path from 'path';
 import { test as testUtil, getNonDefaultParsers } from '../utils';
 
 import { RuleTester } from 'eslint';
+import eslintPkg from 'eslint/package.json';
+import semver from 'semver';
 
 const ruleTester = new RuleTester();
 const rule = require('rules/no-duplicates');
 
-const test = process.env.ESLINT_VERSION === '3' || process.env.ESLINT_VERSION === '2'
+// autofix only possible with eslint 4+
+const test = semver.satisfies(eslintPkg.version, '< 4')
   ? t => testUtil(Object.assign({}, t, { output: t.code }))
   : testUtil;
 

tests/src/rules/order.js

@@ -2257,7 +2257,9 @@ context('TypeScript', function () {
               ],
               errors: [
                 {
-                  message: process.env.ESLINT_VERSION === '2' ? '`bar` import should occur after import of `Bar`' : /(`bar` import should occur after import of `Bar`)|(`Bar` import should occur before import of `bar`)/,
+                  message: semver.satisfies(eslintPkg.version, '< 3')
+                    ? '`bar` import should occur after import of `Bar`'
+                    : /(`bar` import should occur after import of `Bar`)|(`Bar` import should occur before import of `bar`)/,
                 },
               ],
             },
@@ -2293,7 +2295,9 @@ context('TypeScript', function () {
               ],
               errors: [
                 {
-                  message: process.env.ESLINT_VERSION === '2' ? '`bar` import should occur before import of `Bar`' : /(`bar` import should occur before import of `Bar`)|(`Bar` import should occur after import of `bar`)/,
+                  message: semver.satisfies(eslintPkg.version, '< 3')
+                    ? '`bar` import should occur before import of `Bar`'
+                    : /(`bar` import should occur before import of `Bar`)|(`Bar` import should occur after import of `bar`)/,
                 },
               ],
             },