Ignoring flow type exports (#639)

* Ignoring flow type exports, resolve #484 * Added test and note to CHANGELOG
import-js · Nov 3, 2016 · 29bc56e · 29bc56e
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -9,6 +9,7 @@ This change log adheres to standards from [Keep a CHANGELOG](http://keepachangel
 - [`no-extraneous-dependencies`]: check globs against CWD + absolute path ([#602] + [#630], thanks [@ljharb])
 
 ### Fixed
+- [`prefer-default-export`] handles flow `export type` ([#484])
 - [`prefer-default-export`] handles re-exported default exports ([#609])
 - Fix crash when using [`newline-after-import`] with decorators ([#592])
 - Properly report [`newline-after-import`] when next line is a decorator

diff --git a/src/rules/prefer-default-export.js b/src/rules/prefer-default-export.js
@@ -42,6 +42,9 @@ module.exports = {
         // if there are specifiers, node.declaration should be null
         if (!node.declaration) return
 
+        // don't count flow types exports
+        if (node.exportKind === 'type') return
+
         if (node.declaration.declarations) {
           node.declaration.declarations.forEach(function(declaration) {
             captureDeclaration(declaration.id)

diff --git a/tests/src/rules/prefer-default-export.js b/tests/src/rules/prefer-default-export.js
@@ -66,6 +66,11 @@ ruleTester.run('prefer-default-export', rule, {
         import * as foo from './foo';`,
       }),
 
+    test({
+      code: `export type UserId = number;`,
+      parser: 'babel-eslint',
+      }),
+
     // ...SYNTAX_CASES,
   ],
   invalid: [