Question

我有一个ListFragment活动。我需要实施场景（在Espresso的帮助下）：

在ListFragment中添加新项目。
检查它是否正在显示。
删除此项目。
检查它是否显示。

我有第四点的问题。我已阅读文章[https://google.github.io/android-testing-support-library/docs/espresso/advanced/#asserting-that-a-view-is-not-present][1]。

作者建议实施匹配器：

private static Matcher<View> withAdaptedData(final Matcher<Object> dataMatcher) {
      return new TypeSafeMatcher<View>() {
    @Override
    public void describeTo(Description description) {
      description.appendText("with class name: ");
      dataMatcher.describeTo(description);
    }

    @Override
    public boolean matchesSafely(View view) {
      if (!(view instanceof AdapterView)) {
        return false;
      }
      @SuppressWarnings("rawtypes")
      Adapter adapter = ((AdapterView) view).getAdapter();
      for (int i = 0; i < adapter.getCount(); i++) {
        if (dataMatcher.matches(adapter.getItem(i))) {
          return true;
        }
      }
      return false;
    }
  };
}

然后打电话：

onView(withId(R.id.list))
      .check(matches(not(withAdaptedData(withItemContent("item: 168")))));

问题是在我的情况下我没有AdapterView。我在函数withId（）中传递ListFragment的id。所以匹配器不起作用。问题是如何将withAdaptedData的代码更改为与ListFragment一起使用？或者，可能有另一种方法来解决我的任务？

Answer 1

不幸的是，我没有找到比不使用Espresso解决这个问题更好的事情。我只是实现了检查数据不在ListFragment中的方法。

package com.zetcode;

import java.awt.Color;
import java.awt.Container;
import java.awt.EventQueue;
import javax.swing.GroupLayout;
import javax.swing.JComboBox;
import javax.swing.JComponent;
import javax.swing.JFrame;
import static javax.swing.JFrame.EXIT_ON_CLOSE;
import javax.swing.JPanel;

public class GroupLayoutMultipleColumns extends JFrame {

    public GroupLayoutMultipleColumns() {

        initUI();
    }

    private void initUI() {

        JPanel green1 = createPanel(new Color(60, 170, 70));
        JPanel green2 = createPanel(new Color(60, 170, 70));
        JPanel red1 = createPanel(new Color(230, 0, 50));
        JPanel red2 = createPanel(new Color(230, 0, 50));
        JPanel red3 = createPanel(new Color(230, 0, 50));
        JPanel red4 = createPanel(new Color(230, 0, 50));

        JComboBox combo1 = new JComboBox();
        JComboBox combo2 = new JComboBox();

        createLayout(green1, red1, red2, red3, red4,
                combo1, combo2, green2);

        setTitle("Multiple columns");
        setLocationRelativeTo(null);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
    }

    public JPanel createPanel(Color col) {

        JPanel panel = new JPanel();
        panel.setBackground(col);
        return panel;
    }

    private void createLayout(JComponent... arg) {

        Container pane = getContentPane();
        GroupLayout gl = new GroupLayout(pane);
        pane.setLayout(gl);

        gl.setAutoCreateContainerGaps(true);
        gl.setAutoCreateGaps(true);

        gl.setHorizontalGroup(gl.createParallelGroup()
                .addComponent(arg[0])
                .addGroup(gl.createSequentialGroup()
                        .addGroup(gl.createParallelGroup()
                                .addComponent(arg[1])
                                .addComponent(arg[2])
                                .addComponent(arg[3])
                                .addComponent(arg[4]))
                        .addGroup(gl.createParallelGroup()
                                .addComponent(arg[5])
                                .addComponent(arg[6])))
                .addComponent(arg[7])
        );

        gl.setVerticalGroup(gl.createSequentialGroup()
                .addComponent(arg[0])
                .addGroup(gl.createSequentialGroup()
                        .addGroup(gl.createParallelGroup()
                                .addGroup(gl.createSequentialGroup()
                                        .addComponent(arg[1])
                                        .addComponent(arg[2])
                                        .addComponent(arg[3])
                                        .addComponent(arg[4]))
                                .addGroup(gl.createSequentialGroup()
                                        .addComponent(arg[5], GroupLayout.DEFAULT_SIZE,
                                                GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
                                        .addComponent(arg[6], GroupLayout.DEFAULT_SIZE,
                                                GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))))
                .addComponent(arg[7])
        );

        pack();
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(() -> {
            GroupLayoutMultipleColumns ex = new GroupLayoutMultipleColumns();
            ex.setVisible(true);
        });
    }
}

但我相信有更好的解决方案。

如何声明数据项不在带Espresso的ListFragment中？

1 个答案: