我使用this library在我的应用中存储与日期和时间相关的数据。应用程序启动时，AndroidThreeTen首先被初始化以正常运行。所以我想问一下单元测试时如何初始化它？例如。我想使用LocalDate，LocalDateTime等进行测试。
我当前的方式是这样的：
class OverviewViewModelTest {
@Rule
@JvmField
val rule = InstantTaskExecutorRule()
@Before
fun setup() {
AndroidThreeTen.init(Application())
}
//...
}
但是它抛出了这个错误：
java.lang.ExceptionInInitializerError
at org.threeten.bp.ZoneRegion.ofId(ZoneRegion.java:143)
at org.threeten.bp.ZoneId.of(ZoneId.java:358)
at org.threeten.bp.ZoneId.of(ZoneId.java:286)
at org.threeten.bp.ZoneId.systemDefault(ZoneId.java:245)
at org.threeten.bp.Clock.systemDefaultZone(Clock.java:137)
at org.threeten.bp.LocalDate.now(LocalDate.java:165)
Caused by: java.lang.RuntimeException: Method getAssets in android.content.ContextWrapper not mocked. See http://g.co/androidstudio/not-mocked for details.
at android.content.ContextWrapper.getAssets(ContextWrapper.java)
at com.jakewharton.threetenabp.AssetsZoneRulesInitializer.initializeProviders(AssetsZoneRulesInitializer.java:22)
at org.threeten.bp.zone.ZoneRulesInitializer.initialize(ZoneRulesInitializer.java:89)
at org.threeten.bp.zone.ZoneRulesProvider.<clinit>(ZoneRulesProvider.java:82)
... 32 more
那我怎样才能使这个库在单元测试中工作？
答案 0 :(得分：0)
使用latest comment at the GitHub issue，我能够使用Robolectric库运行“三十” Android backport。对于Kotlin用户，请勿使用最终课程。而是使用 open 类。
在您应用的<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Raect Aiignment - PI Chart</title>
<script src="https://unpkg.com/@babel/standalone/babel.min.js"></script>
<script crossorigin src="https://unpkg.com/react@16/umd/react.development.js"></script>
<script crossorigin src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script>
<!-- <script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.3/Chart.js"></script> -->
<script src="https://unpkg.com/chart.js@2.7.2/dist/Chart.bundle.js"></script>
<!-- chartkick dependency on chart.js -->
<script src="https://unpkg.com/react-chartkick@0.3.0"></script>
<style>
.circle_style
{
fill: #f4fc16;
stroke: #DF5C24;
transition: stroke-dasharray 1s linear infinite
}
.svg_style {
background: #f4fc16;
-webkit-border-radius: 50%;
-moz-border-radius: 50%;
border-radius: 50%;
}
</style>
</head>
<body>
<div id="root"></div>
<script type="text/babel">
const svgVars = {
svgWidth: 100,
svgHeight: 100,
defaultRadius: 25,
cX: 50,
cY: 50,
defaultStrokeWidth: 50, // 2*circleRadius = 50
};
const circumferenceWidth = () => Math.PI * 2 * svgVars.defaultRadius;
var dashWidth = (rangeSliderValue = 50) => {
return ( rangeSliderValue * circumferenceWidth() / 100).toFixed(3) ;
};
class Slider extends React.Component {
constructor(props) {
super(props);
}
render() {
return (
<form id="slider_form" role="form">
<input type="range" min={0} max={100} defaultValue={25} step={1} onChange={this.props.doAfterSlide} />
</form>
);
}
}
class Head extends React.Component {
render() {
return (
<h1>PI Chart with range slider</h1>
);
}
}
class Chart extends React.Component {
render() {
let cirStyle = {
strokeDasharray: `${ dashWidth() } ${ circumferenceWidth() }`,
strokeWidth: svgVars.defaultStrokeWidth
}
return (
<svg width={ svgVars.svgWidth } height={ svgVars.svgHeight } className="svg_style">
<circle r={ svgVars.defaultRadius } cx={ svgVars.cX } cy={ svgVars.cY } style={ cirStyle } className="circle_style" />
</svg>
);
}
}
class PieChart extends React.Component {
constructor(props) {
super(props);
// This binding is necessary to make `this` work in the callback
this.updatePiechart = this.updatePiechart.bind(this);
}
updatePiechart(e) {
let sliderValue = e.target.value;
let dw = dashWidth(sliderValue);
console.log(dw);
console.log("hello");
}
render() {
return (
<div>
<Head />
<Slider doAfterSlide={this.updatePiechart} />
<Chart />
</div>
);
}
}
/**
* Render
*
*/
ReactDOM.render(
<PieChart />,
document.getElementById('root')
);
</script>
</body>
</html>
中，添加：
build.gradle并使用此模板通过ThreeTenABP编写测试：
dependencies {
// ...
testImplementation('org.threeten:threetenbp:1.3.8') {
exclude group: 'com.jakewharton.threetenabp', module: 'threetenabp'
}
}