Add regression test

tests/src/rules/no-duplicates.js

@@ -400,6 +400,74 @@ ruleTester.run('no-duplicates', rule, {
       `,
       errors: ['\'./foo\' imported multiple times.', '\'./foo\' imported multiple times.'],
     }),
+
+
+    // #2027 long import list generate empty lines
+    test({
+      code: `
+        import { One } from './one'
+        import { Two } from './two'
+        import { Three } from './three'
+        import { Four } from './four'
+        import { Five } from './five'
+        import { Six } from './six'
+        import { Seven } from './seven'
+        import { Eight } from './eight'
+        import { Nine } from './nine'
+        import { Ten } from './ten'
+        import { Eleven } from './eleven'
+        import { OneDoc } from './one'
+        import { TwoDoc } from './two'
+        import { ThreeDoc } from './three'
+        import { FourDoc } from './four'
+        import { FiveDoc } from './five'
+        import { SixDoc } from './six'
+        import { SevenDoc } from './seven'
+        import { EightDoc } from './eight'
+        import { NineDoc } from './nine'
+        import { TenDoc } from './ten'
+        import { ElevenDoc } from './eleven'
+        export const value = {}
+      `,
+      output: `
+        import { One, OneDoc } from './one'
+        import { Two, TwoDoc } from './two'
+        import { Three, ThreeDoc } from './three'
+        import { Four, FourDoc } from './four'
+        import { Five, FiveDoc } from './five'
+        import { Six, SixDoc } from './six'
+        import { Seven, SevenDoc } from './seven'
+        import { Eight, EightDoc } from './eight'
+        import { Nine, NineDoc } from './nine'
+        import { Ten, TenDoc } from './ten'
+        import { Eleven, ElevenDoc } from './eleven'
+        export const value = {}
+      `,
+      errors: [
+        '\'./one\' imported multiple times.',
+        '\'./two\' imported multiple times.',
+        '\'./three\' imported multiple times.',
+        '\'./four\' imported multiple times.',
+        '\'./five\' imported multiple times.',
+        '\'./six\' imported multiple times.',
+        '\'./seven\' imported multiple times.',
+        '\'./eight\' imported multiple times.',
+        '\'./nine\' imported multiple times.',
+        '\'./ten\' imported multiple times.',
+        '\'./eleven\' imported multiple times.',
+        '\'./one\' imported multiple times.',
+        '\'./two\' imported multiple times.',
+        '\'./three\' imported multiple times.',
+        '\'./four\' imported multiple times.',
+        '\'./five\' imported multiple times.',
+        '\'./six\' imported multiple times.',
+        '\'./seven\' imported multiple times.',
+        '\'./eight\' imported multiple times.',
+        '\'./nine\' imported multiple times.',
+        '\'./ten\' imported multiple times.',
+        '\'./eleven\' imported multiple times.',
+      ],
+    }),
   ],
 });