feat(Stepper): add long-press prop

src/stepper/test/__snapshots__/index.spec.js.snap

@@ -1,5 +1,7 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`button-size prop 1`] = `<div class="van-stepper"><button type="button" class="van-stepper__minus van-stepper__minus--disabled" style="width: 2rem; height: 2rem;"></button><input type="number" role="spinbutton" aria-valuemax="Infinity" aria-valuemin="1" aria-valuenow="1" class="van-stepper__input" style="height: 2rem;"><button type="button" class="van-stepper__plus" style="width: 2rem; height: 2rem;"></button></div>`;
+
 exports[`disable stepper input 1`] = `<div class="van-stepper"><button type="button" class="van-stepper__minus van-stepper__minus--disabled"></button><input type="number" role="spinbutton" aria-valuemax="Infinity" aria-valuemin="1" aria-valuenow="1" disabled="disabled" class="van-stepper__input"><button type="button" class="van-stepper__plus"></button></div>`;
 
 exports[`disabled stepper 1`] = `<div class="van-stepper"><button type="button" class="van-stepper__minus van-stepper__minus--disabled"></button><input type="number" role="spinbutton" aria-valuemax="Infinity" aria-valuemin="1" aria-valuenow="1" disabled="disabled" class="van-stepper__input"><button type="button" class="van-stepper__plus van-stepper__plus--disabled"></button></div>`;

src/stepper/test/index.spec.js

@@ -89,6 +89,22 @@ test('long press', async () => {
   expect(wrapper.emitted('input')).toEqual([[2], [3], [4]]);
 });
 
+test('disable long press', async () => {
+  const wrapper = mount(Stepper, {
+    propsData: {
+      value: 1,
+      longPress: false
+    }
+  });
+
+  const plus = wrapper.find('.van-stepper__plus');
+  plus.trigger('touchstart');
+  await later(800);
+  plus.trigger('touchend');
+
+  expect(wrapper.emitted('input')).toBeFalsy();
+});
+
 test('filter value during user input', () => {
   const wrapper = mount(Stepper, {
     propsData: {
@@ -178,6 +194,15 @@ test('input-width prop', () => {
   expect(wrapper).toMatchSnapshot();
 });
 
+test('button-size prop', () => {
+  const wrapper = mount(Stepper, {
+    propsData: {
+      buttonSize: '2rem'
+    }
+  });
+  expect(wrapper).toMatchSnapshot();
+});
+
 test('async-change prop', () => {
   const wrapper = mount(Stepper, {
     propsData: {