From 370480171e99241980f7251a19049c1973fcaad9 Mon Sep 17 00:00:00 2001
From: Chiawen Chen <golopot@gmail.com>
Date: Sat, 24 Aug 2019 23:24:23 +0800
Subject: [PATCH] [fix] `prefer-default-export`: fix cases when exporting array
 destructuring

Fixes #706
---
 src/rules/prefer-default-export.js       |  5 ++++-
 tests/src/rules/prefer-default-export.js | 12 ++++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/rules/prefer-default-export.js b/src/rules/prefer-default-export.js
index 59c26d11e..f0af00d02 100644
--- a/src/rules/prefer-default-export.js
+++ b/src/rules/prefer-default-export.js
@@ -23,7 +23,10 @@ module.exports = {
           .forEach(function(property) {
             captureDeclaration(property.value)
           })
-      } else {
+      } else if (identifierOrPattern.type === 'ArrayPattern') {
+        identifierOrPattern.elements
+          .forEach(captureDeclaration)
+      } else  {
       // assume it's a single standard identifier
         specifierExportCount++
       }
diff --git a/tests/src/rules/prefer-default-export.js b/tests/src/rules/prefer-default-export.js
index adca4b602..d0b46530a 100644
--- a/tests/src/rules/prefer-default-export.js
+++ b/tests/src/rules/prefer-default-export.js
@@ -43,6 +43,10 @@ ruleTester.run('prefer-default-export', rule, {
       code: `
         export const { foo: { bar, baz } } = item;`,
       }),
+    test({
+      code: `
+        export const [a, b] = item;`,
+      }),
     test({
       code: `
         let item;
@@ -127,6 +131,14 @@ ruleTester.run('prefer-default-export', rule, {
         message: 'Prefer default export.',
       }],
     }),
+    test({
+      code: `
+        export const [a] = ["foo"]`,
+      errors: [{
+        ruleId: 'ExportNamedDeclaration',
+        message: 'Prefer default export.',
+      }],
+    }),
   ],
 })