From b151d0492a8c372a55831323f48a99efe3276df0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ren=C3=A9=20Fermann?= <rene.fermann@gmx.de>
Date: Mon, 15 Apr 2019 23:42:04 +0200
Subject: [PATCH] [fix] `no-unused-modules`: avoid crash when using
 `ignoreExports`-option

Fixes #1323.
---
 src/rules/no-unused-modules.js       |  4 ++++
 tests/src/rules/no-unused-modules.js | 15 +++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/src/rules/no-unused-modules.js b/src/rules/no-unused-modules.js
index 91d1679bb..552004b6d 100644
--- a/src/rules/no-unused-modules.js
+++ b/src/rules/no-unused-modules.js
@@ -274,6 +274,10 @@ module.exports = {
         return
       }
 
+      if (ignoredFiles.has(file)) {
+        return
+      }
+
       const exportCount = exportList.get(file)
       const exportAll = exportCount.get(EXPORT_ALL_DECLARATION)
       const namespaceImports = exportCount.get(IMPORT_NAMESPACE_SPECIFIER)
diff --git a/tests/src/rules/no-unused-modules.js b/tests/src/rules/no-unused-modules.js
index 9918b85f4..7b11ee6d0 100644
--- a/tests/src/rules/no-unused-modules.js
+++ b/tests/src/rules/no-unused-modules.js
@@ -549,3 +549,18 @@ describe('test behaviour for new file', () => {
     }
   })
 })
+
+describe('do not report missing export for ignored file', () => {
+  ruleTester.run('no-unused-modules', rule, {
+    valid: [
+      test({ options: [{
+               src: [testFilePath('./no-unused-modules/**/*.js')],
+               ignoreExports: [testFilePath('./no-unused-modules/*ignored*.js')],
+               missingExports: true
+              }],
+             code: 'export const test = true',
+             filename: testFilePath('./no-unused-modules/file-ignored-a.js')}),
+    ],
+    invalid: [],
+  })
+})