fix(uploader): automatically filter files exceeding the max-size (#6150)

src/uploader/test/__snapshots__/demo.spec.js.snap

@@ -84,6 +84,14 @@ exports[`renders demo correctly 1`] = `
       </div>
     </div>
   </div>
+  <div>
+    <div class="van-uploader">
+      <div class="van-uploader__wrapper">
+        <div class="van-uploader__upload"><i class="van-icon van-icon-photograph van-uploader__upload-icon">
+            <!----></i><input multiple="multiple" type="file" accept="image/*" class="van-uploader__input"></div>
+      </div>
+    </div>
+  </div>
   <div>
     <div class="van-uploader">
       <div class="van-uploader__wrapper">

src/uploader/test/index.spec.js

@@ -487,3 +487,23 @@ test('file message should be reactive', (done) => {
 
   wrapper.vm.onChange(file);
 });
+
+test('multiFile upload filter max-size file', async () => {
+  const SmallFile = function () {
+    this.size = 100;
+  };
+  const multiFiles = {
+    target: { files: [mockFile, new SmallFile([], 'small-test.jpg')] },
+  };
+
+  const wrapper = mount(Uploader, {
+    propsData: {
+      maxSize: 1000,
+    },
+  });
+  wrapper.vm.onChange(multiFiles);
+
+  await later();
+
+  expect(wrapper.emitted('oversize')[0]).toBeTruthy();
+});