fix(Select): showDataSourceChildren with empty child

Author: bindoon

src/select/util.js

@@ -58,11 +58,10 @@ export function loopMap(dataSource, callback) {
     dataSource.forEach(option => {
         if (option.children) {
             const children = loopMap(option.children, callback);
-            children.length &&
-                result.push({
-                    ...option,
-                    children,
-                });
+            result.push({
+                ...option,
+                children,
+            });
         } else {
             // eslint-disable-next-line callback-return
             const tmp = callback(option);

test/select/index-spec.js

@@ -49,16 +49,22 @@ describe('Select', () => {
     });
 
     it('should support showDataSourceChildren to ignore dataSource children', () => {
-        const dataSource = [{ label: 'xxx', value: 'yyy', children: [
-            { label: 'xxx1', value: 'yyy1' },
-            { label: 'xxx2', value: 'yyy2' }
-        ]}];
+        const dataSource = [{ 
+            label: 'xxx', 
+            value: 'yyy', 
+            children: [{ label: 'xxx1', value: 'yyy1' },{ label: 'xxx2', value: 'yyy2' }]
+        },{
+            label: 'label1',
+            value: 'label1',
+            children: []
+        }];
+
         wrapper.setProps({
             dataSource,
             visible: true,
             showDataSourceChildren: false
         });
-        assert(document.querySelectorAll('.next-menu-item').length === 1);
+        assert(document.querySelectorAll('.next-menu-item').length === 2);
     });
 
     it('should support empty value from dataSource', () => {