Fix #545: allow re-export of defaults from ignored files (i.e. node_m…

…odules)

src/rules/default.js

@@ -19,7 +19,7 @@ module.exports = function (context) {
 
     if (imports.errors.length) {
       imports.reportErrors(context, node)
-    } else if (!imports.get('default')) {
+    } else if (imports.get('default') === undefined) {
       context.report(defaultSpecifier, 'No default export found in module.')
     }
   }

tests/files/default-export-from-ignored.js

@@ -0,0 +1 @@
+export { foo as default } from './common.js'

tests/files/default-export-from-named.js

@@ -0,0 +1 @@
+export { d as default } from './named-exports.js'

tests/files/default-export-from.js

@@ -0,0 +1 @@
+export default from './bar'

tests/src/rules/default.js

@@ -66,6 +66,27 @@ ruleTester.run('default', rule, {
       parser: 'babel-eslint',
     }),
 
+    // #545: more ES7 cases
+    test({
+      code: "import bar from './default-export-from.js';",
+      parser: 'babel-eslint',
+    }),
+    test({
+      code: "import bar from './default-export-from-named.js';",
+      parser: 'babel-eslint',
+    }),
+    test({
+      code: "import bar from './default-export-from-ignored.js';",
+      settings: { 'import/ignore': ['common'] },
+      parser: 'babel-eslint',
+    }),
+    test({
+      code: "export bar from './default-export-from-ignored.js';",
+      settings: { 'import/ignore': ['common'] },
+      parser: 'babel-eslint',
+    }),
+
+
     ...SYNTAX_CASES,
   ],