[Improvement] Toast: add test cases (#1104)

packages/toast/test/__snapshots__/index.spec.js.snap

@@ -0,0 +1,9 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`create a forbidClick toast 1`] = `
+<div class="van-toast van-toast--text van-toast--middle" style="display: none;" name="van-fade">
+  <div></div>
+  <!---->
+  <!---->
+</div>
+`;

packages/toast/test/index.spec.js

@@ -0,0 +1,70 @@
+import Toast from '../';
+import Vue from 'vue';
+import { TransitionStub } from '@vue/test-utils';
+
+Vue.component('transition', TransitionStub);
+
+test('create a forbidClick toast', () => {
+  const toast = Toast({
+    forbidClick: true
+  });
+
+  expect(toast.$el.outerHTML).toMatchSnapshot();
+});
+
+it('toast disappeared after duration', (done) => {
+  const toast = Toast({
+    duration: 10
+  });
+
+  setTimeout(() => {
+    expect(toast.$el.style.display).toEqual('none');
+    done();
+  }, 500);
+});
+
+test('clear toast', () => {
+  const toast1 = Toast();
+  expect(toast1.value).toBeTruthy();
+  Toast.clear();
+  expect(toast1.value).toBeFalsy();
+
+  Toast.allowMultiple();
+  const toast2 = Toast('2');
+  const toast3 = Toast('3');
+  Toast.clear(true);
+  expect(toast2.value).toBeFalsy();
+  expect(toast3.value).toBeFalsy();
+  Toast.allowMultiple(false);
+});
+
+test('multiple toast', () => {
+  Toast.allowMultiple();
+  Toast.clear(true);
+  const toast1 = Toast.success('1');
+  const toast2 = Toast.success('2');
+  Toast.clear();
+  expect(toast1.value).toBeFalsy();
+  expect(toast2.value).toBeTruthy();
+  Toast.clear();
+  Toast.clear();
+  expect(toast2.value).toBeFalsy();
+  Toast.allowMultiple(false);
+});
+
+test('set default options', () => {
+  Toast.setDefaultOptions({ duration: 1000 });
+  expect(Toast().duration).toEqual(1000);
+  Toast.resetDefaultOptions();
+  expect(Toast().duration).toEqual(3000);
+});
+
+test('toast duration 0', () => {
+  Toast.allowMultiple();
+  const toast = Toast({
+    message: 'toast',
+    duration: 0
+  });
+  expect(toast.timer).toBeFalsy();
+  Toast.allowMultiple(false);
+});