android - (Unit)ArrayAdapter的测试

Question

我广泛使用了ArrayAdapter在我的应用程序中，因为大多数 Activity 都持有 ListView我需要一些自定义的东西。

我查看了 android 开发人员文档中的测试类，但找不到一些示例或合适的测试类...

1) 有没有在 Android 中(单元)测试 ArrayAdapter 的最佳实践？

2) 我是否选择了错误的方法(使用适配器)并以这种方式杀死了可测试性？

Answer 1

您可以编写扩展 AndroidTestCase 的测试，它看起来像这样:

public class ContactsAdapterTest extends AndroidTestCase {
    private ContactsAdapter mAdapter;

    private Contact mJohn;
    private Contact mJane;

    public ContactsAdapterTest() {
        super();
    }

    protected void setUp() throws Exception {
        super.setUp();
        ArrayList<Contact> data = new ArrayList<Contact>();

        mJohn = new Contact("John", "+34123456789", "uri");
        mJane = new Contact("Jane", "+34111222333", "uri");
        data.add(mJohn);
        data.add(mJane);
        mAdapter = new ContactsAdapter(getContext(), data);
    }


    public void testGetItem() {
        assertEquals("John was expected.", mJohn.getName(),
                ((Contact) mAdapter.getItem(0)).getName());
    }

    public void testGetItemId() {
        assertEquals("Wrong ID.", 0, mAdapter.getItemId(0));
    }

    public void testGetCount() {
        assertEquals("Contacts amount incorrect.", 2, mAdapter.getCount());
    }

    // I have 3 views on my adapter, name, number and photo
    public void testGetView() {
        View view = mAdapter.getView(0, null, null);

        TextView name = (TextView) view
                .findViewById(R.id.text_contact_name);

        TextView number = (TextView) view
                .findViewById(R.id.text_contact_number);

        ImageView photo = (ImageView) view
                .findViewById(R.id.image_contact_photo);

        //On this part you will have to test it with your own views/data
        assertNotNull("View is null. ", view);
        assertNotNull("Name TextView is null. ", name);
        assertNotNull("Number TextView is null. ", number);
        assertNotNull("Photo ImageView is null. ", photo);

        assertEquals("Names doesn't match.", mJohn.getName(), name.getText());
        assertEquals("Numbers doesn't match.", mJohn.getNumber(),
                number.getText());
    }
}

您可能需要使用不同的参数多次测试 getView 以测试所有场景。