android中單元測試中的斷言assert的使用與擴充

標籤：android   單元測試   斷言 assert   java   

首先看一組對比，比如說我們要測試的結果是一個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);

從形式上，使用上更加方便。

從輸出結果上看，輸出結果更加直接可見。

• AssertJ Android:     Expected visibility <gone> but was <invisible>.

• Regular JUnit          Expected:<[8]> but was:<[4]>

• Regular AssertJ:     Expected: <8> but was: <4>

所以接下來我們來看看  Assert Android如何來使用。1首先寫一個待測試的資料結構 public class Draft{      private String id;//草稿的唯一標識id 
      private String uid ;//發送帳號uid，以區別不同帳號的草稿
      private int type;//儲存的類型
      private String displayedTitle;//展示標題內容
}2 \首先我們來自訂一個斷言類:   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、使用的時候     DraftAssert.assertThat(draft).hasDisplayedName("@羅浩");     如果匯入DraftAssert.assertThat靜態匯入的話，你還可以直接使用     assertThat(draft).hasDisplayedName("@羅浩");

android中單元測試中的斷言assert的使用與擴充