手机端样式细节调整，补充测试用例 (#3)

* unit test

* picker and dialog unit tes

* fix:quantity and loading

test/unit/specs/dialog.spec.js

@@ -0,0 +1,27 @@
+// import Dialog from 'packages/dialog';
+import DialogComponent from 'packages/dialog/src/dialog.vue';
+import { mount } from 'avoriaz';
+
+describe('Dialog', () => {
+  let wrapper;
+  afterEach(() => {
+    wrapper && wrapper.destroy();
+  });
+
+  it('create a dialog component', () => {
+    let called = false;
+    wrapper = mount(DialogComponent);
+    wrapper.vm.callback = () => {
+      called = true;
+    };
+
+    expect(wrapper.hasClass('van-dialog-wrapper')).to.be.true;
+    expect(wrapper.data().confirmButtonText).to.equal('确认');
+
+    const confirmBtn = wrapper.find('.van-dialog__confirm')[0];
+    confirmBtn.simulate('click');
+
+    expect(wrapper.vm.value).to.be.false;
+    expect(called).to.be.true;
+  });
+});