android中單元測試中的斷言assert的使用與擴展

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 but was .

  • 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數據結構 public class Draft{ private String id;//草稿的唯一標識id
    private String uid ;//發送賬號uid，以區別不同賬號的草稿
    private int type;//保存的類型
    private String displayedTitle;//展示標題內容
    } 2 \首先我們來自定義一個斷言類: public class DraftAssert extends AbstractAssert{ 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"); 如果導入DraftAssert.assertThat靜態導入的話，你還可以直接使用 assertThat(draft).hasDisplayedName("@羅浩");