From c327ae853c8e33c50f575fe3589aa1bdda64ba19 Mon Sep 17 00:00:00 2001
From: Matthew Shao <me@matshao.com>
Date: Mon, 15 May 2017 17:55:06 +0800
Subject: [web] Add tests for js/components/helpers/AutoScroll.js

---
 .../__tests__/components/helpers/AutoScrollSpec.js | 41 ++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 web/src/js/__tests__/components/helpers/AutoScrollSpec.js

(limited to 'web/src/js')

diff --git a/web/src/js/__tests__/components/helpers/AutoScrollSpec.js b/web/src/js/__tests__/components/helpers/AutoScrollSpec.js
new file mode 100644
index 00000000..18a3d669
--- /dev/null
+++ b/web/src/js/__tests__/components/helpers/AutoScrollSpec.js
@@ -0,0 +1,41 @@
+import React from "react"
+import ReactDOM from "react-dom"
+import AutoScroll from '../../../components/helpers/AutoScroll'
+import { calcVScroll } from '../../../components/helpers/VirtualScroll'
+import TestUtils from 'react-dom/test-utils'
+
+describe('Autoscroll', () => {
+    let mockFn = jest.fn()
+    class tComponent extends React.Component {
+        constructor(props, context){
+            super(props, context)
+            this.state = { vScroll: calcVScroll() }
+        }
+
+       componentWillUpdate() {
+           mockFn("foo")
+       }
+
+       componentDidUpdate() {
+           mockFn("bar")
+       }
+
+       render() {
+           return (<p>foo</p>)
+       }
+    }
+
+    it('should update component', () => {
+        let Foo = AutoScroll(tComponent),
+            autoScroll = TestUtils.renderIntoDocument(<Foo></Foo>),
+            viewport = ReactDOM.findDOMNode(autoScroll)
+        viewport.scrollTop = 10
+        Object.defineProperty(viewport, "scrollHeight", { value: 10, writable: true })
+        autoScroll.componentWillUpdate()
+        expect(mockFn).toBeCalledWith("foo")
+
+        Object.defineProperty(viewport, "scrollHeight", { value: 0, writable: true })
+        autoScroll.componentDidUpdate()
+        expect(mockFn).toBeCalledWith("bar")
+    })
+})
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