android中单元测试中的断言assert的使用与扩展

时间：2014-10-17 15:32:44 收藏：0 阅读：341

首先看一组对比，比如说我们要测试的结果是一个Linearlaout

AssertJ Android:

assertThat(layout).isVisible()
    .isVertical()
    .hasChildCount(4)
    .hasShowDividers(SHOW_DIVIDERS_MIDDLE);

Regular JUnit:

assertEquals(View.VISIBLE, layout.getVisibility());
assertEquals(VERTICAL, layout.getOrientation());
assertEquals(4, layout.getChildCount());
assertEquals(SHOW_DIVIDERS_MIDDLE, layout.getShowDividers());

Regular AssertJ:

assertThat(layout.getVisibility()).isEqualTo(View.VISIBLE);
assertThat(layout.getOrientation()).isEqualTo(VERTICAL);
assertThat(layout.getChildCount()).isEqualTo(4);
assertThat(layout.getShowDividers()).isEqualTo(SHOW_DIVIDERS_MIDDLE);

从形式上，使用上更加方便。

从输出结果上看，输出结果更加直接可见。

AssertJ Android: Expected visibility <gone> but was <invisible>.
Regular JUnit Expected:<[8]> but was:<[4]>
Regular AssertJ: Expected: <8> but was: <4>

所以接下来我们来看看 Assert Android如何来使用。

1首先写一个待测试的数据结构

public class Draft{

private String id;//草稿的唯一标识id
private String uid ;//发送账号uid，以区别不同账号的草稿
private int type;//保存的类型

private String displayedTitle;//展示标题内容

}

2 \首先我们来自定义一个断言类:

public class DraftAssert extends AbstractAssert<DraftAssert ,Draft>{

public DraftAssert (Draft draft){

super(draft,DraftAssert.class);}

}

public static DraftAssert assertThat(Draft draft){

return new DraftAssert (draft);}

public DraftAssert hasDisplayedName(String name){

isNotNull();

if (!draft.getDisplayedTitle().equals(name)){

failWithMessage(("Expected character‘s name to be <%s> but was <%s>", name, draft.getDisplayedTitle());)

return this;

}

3、使用的时候

DraftAssert.assertThat(draft).hasDisplayedName("@罗浩");

如果导入DraftAssert.assertThat静态导入的话，你还可以直接使用

assertThat(draft).hasDisplayedName("@罗浩");

原文：http://blog.csdn.net/yclfdn2004/article/details/40185621