断言项目的适当数量的清单，ES preSSO [英] Assert proper number of items in list with espresso

问题描述

什么是检查和断言，一个ListView与Android ES preSSO预期大小的最佳方式？

我写此匹配，但不太知道如何将它集成到测试。

 公共静态匹配器＆LT;视图＆gt; withListSize（最终诠释大小）{
    返回新TypeSafeMatcher＆LT;视图＆gt; （）{
        @覆盖公共布尔matchesSafely（最​​终查看视图）{
            回报（（ListView控件）视图）.getChildCount（）==大小;
        }        @覆盖公共无效describeTo（最终说明描述）{
            description.appendText（ListView中应该有+规模+项目）;
        }
    };
}
 

解决方案

想通了这一点。

 类匹配器{
  公共静态匹配器＆LT;视图＆gt; withListSize（最终诠释大小）{
    返回新TypeSafeMatcher＆LT;视图＆gt; （）{
      @覆盖公共布尔matchesSafely（最​​终查看视图）{
        回报（（ListView控件）视图）.getChildCount（）==大小;
      }      @覆盖公共无效describeTo（最终说明描述）{
        description.appendText（ListView中应该有+规模+项目）;
      }
    };
  }
}
 

如果在列表中期待一个项目，把这个在实际的测试脚本。

  OnView由（withId（android.R.id.list））检查（ViewAssertions.matches（Matchers.withListSize（1）））;
 

What is the best way to inspect and assert that a listview is the expected size with android espresso?

I wrote this matcher, but don't quite know how to integrate it into the test.

public static Matcher<View> withListSize (final int size) {
    return new TypeSafeMatcher<View> () {
        @Override public boolean matchesSafely (final View view) {
            return ((ListView) view).getChildCount () == size;
        }

        @Override public void describeTo (final Description description) {
            description.appendText ("ListView should have " + size + " items");
        }
    };
}

解决方案

Figured this out.

class Matchers {
  public static Matcher<View> withListSize (final int size) {
    return new TypeSafeMatcher<View> () {
      @Override public boolean matchesSafely (final View view) {
        return ((ListView) view).getChildCount () == size;
      }

      @Override public void describeTo (final Description description) {
        description.appendText ("ListView should have " + size + " items");
      }
    };
  }
}

If expecting one item in the list, put this in the actual test script.

onView (withId (android.R.id.list)).check (ViewAssertions.matches (Matchers.withListSize (1)));

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