[improvement] add test case for field icon props (#2876)

packages/goods-action/test/__snapshots__/index.spec.js.snap

@@ -0,0 +1,8 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`BigBtn render default slot 1`] = `<button class="van-button van-button--warning van-button--large van-button--square van-goods-action-big-btn"><span class="van-button__text">Default Content</span></button>`;
+
+exports[`Mini render default slot 1`] = `
+<div class="van-goods-action-mini-btn van-hairline"><i class="van-icon van-icon-undefined van-goods-action-mini-btn__icon">
+    <!----></i>Default Content</div>
+`;

packages/goods-action/test/index.spec.js

@@ -29,3 +29,23 @@ test('MiniBtn click event', () => {
   wrapper.trigger('click');
   expect(click.mock.calls.length).toEqual(1);
 });
+
+test('BigBtn render default slot', () => {
+  const wrapper = mount({
+    render(h) {
+      return h(BigBtn, null, ['Default Content']);
+    }
+  });
+
+  expect(wrapper).toMatchSnapshot();
+});
+
+test('Mini render default slot', () => {
+  const wrapper = mount({
+    render(h) {
+      return h(MiniBtn, null, ['Default Content']);
+    }
+  });
+
+  expect(wrapper).toMatchSnapshot();
+});