[Improvement] Uploader add test cases (#1188)

packages/uploader/test/index.spec.js

@@ -0,0 +1,95 @@
+import Uploader from '..';
+import { mount } from '@vue/test-utils';
+
+window.File = function() {
+  this.size = 10000;
+};
+
+window.FileReader = function() {
+  this.readAsDataURL = this.readAsText = function() {
+    this.onload &&
+      this.onload({
+        target: {
+          result: 'test'
+        }
+      });
+  };
+};
+
+const mockFile = new File([], '/Users');
+const file = { target: { files: [mockFile] }};
+const multiFile = { target: { files: [mockFile, mockFile] }};
+
+test('disabled', () => {
+  const afterRead = jest.fn();
+  const wrapper = mount(Uploader, {
+    propsData: {
+      disabled: true,
+      afterRead
+    }
+  });
+
+  wrapper.vm.onChange(file);
+  expect(afterRead.mock.calls.length).toBeFalsy();
+});
+
+it('read text', done => {
+  const wrapper = mount(Uploader, {
+    propsData: {
+      resultType: 'text',
+      afterRead: file => {
+        expect(file.content).toEqual('test');
+        done();
+      }
+    }
+  });
+
+  wrapper.vm.onChange(file);
+});
+
+it('unknown resultType', () => {
+  const afterRead = jest.fn();
+  const wrapper = mount(Uploader, {
+    propsData: {
+      resultType: 'xxxx',
+      afterRead
+    }
+  });
+  wrapper.vm.onChange(file);
+  expect(afterRead.mock.calls.length).toBeFalsy();
+});
+
+it('before read return false', () => {
+  const afterRead = jest.fn();
+  const wrapper = mount(Uploader, {
+    propsData: {
+      beforeRead: () => false,
+      afterRead
+    }
+  });
+
+  wrapper.vm.onChange(file);
+  expect(afterRead.mock.calls.length).toBeFalsy();
+});
+
+test('file size overlimit', done => {
+  const wrapper = mount(Uploader, {
+    propsData: {
+      maxSize: 1
+    }
+  });
+  wrapper.vm.onChange(file);
+  wrapper.vm.onChange(multiFile);
+
+  setTimeout(() => {
+    expect(wrapper.emitted('oversize')[0]).toBeTruthy();
+    expect(wrapper.emitted('oversize')[1]).toBeTruthy();
+
+    wrapper.vm.maxSize = 100000;
+    wrapper.vm.onChange(multiFile);
+    setTimeout(() => {
+      expect(wrapper.emitted('oversize')[2]).toBeFalsy();
+      done();
+    });
+  });
+});