android – 如何为AlertDialog进行Robolectric测试

我是robolectric的新手,我正在尝试对创建AlertDialog的按钮进行测试.单击该按钮时,将使用正面按钮创建一个AlertDialog,我想使用Robolectric单击该按钮,并测试它是否启动了一个活动.这是按钮的代码：

newUserButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            AlertDialog.Builder builder = new AlertDialog.Builder(StartActivity.this);
            builder.setTitle(context.getResources().getString(R.string.start_title_message))
                    .setMessage(getResources().getString(R.string.start_dialog_message));
            builder.setPositiveButton(getString(R.string.start_confirm_message), new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    startActivityForResult(new Intent(StartActivity.this, AvatarRoomActivity.class), 0);
                }
            });
            builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    dialog.dismiss();
                }
            });
            AlertDialog dialog = builder.create();
            ColorDrawable drawable = new ColorDrawable(Color.WHITE);
            drawable.setAlpha(200);
            dialog.getWindow().setBackgroundDrawable(drawable);
            dialog.show();
        }
    });

有谁知道如何测试点击肯定按钮,然后启动AvatarRoomActivity？提前致谢,希望很快能收到某人的来信.

解决方法:

让我们暂时忘记newUserButton.它与问题无关.

您需要公开AlertDialog对象,以便可以在单元测试代码中访问它.所以我假设你的活动在StartActivity中有这样的方法：

AlertDialog showDialog() {

    AlertDialog.Builder builder = new AlertDialog.Builder(StartActivity.this);
    builder.setTitle("This is title")
            .setMessage("Dialog Message");
    builder.setPositiveButton("Confirm", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int id) {
            startActivityForResult(new Intent(this, AvatarRoomActivity.class), 0);
        }
    });
    builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int id) {
            dialog.dismiss();
        }
    });
    AlertDialog dialog = builder.create();
    dialog.show();

    return dialog;

}

然后newUserButton的click事件只是调用此方法.

然后我们有这样的测试用例：

@Test
public void testLaunchAvatarRoomWhenConfirm() {

    StartActivity startActivity = Robolectric.buildActivity(StartActivity.class).create().get();

    AlertDialog dialog = startActivity.showDialog();

    // Key part 1 : simulate button click in unit test
    Button confirm = dialog.getButton(Dialog.BUTTON_POSITIVE);
    confirm.performClick();

    // Key part 2 : Check that startActivityForResult is invoke
    ShadowActivity shadowActivity = shadowOf(startActivity);
    ShadowActivity.IntentForResult intentForResult = shadowActivity.getNextStartedActivityForResult();

    // assert that the proper request to start activity is sent
    ComponentName nextActivity = intentForResult.intent.getComponent();
    assertEquals(".AvatarRoomActivity", nextActivity.getShortClassName());

}

此测试方法验证当单击对话框的正按钮时,将使用适当的活动类名调用startActivityForResult.

所以剩下的问题是我们如何确保活动真正得到解决和启动.通常我会在此时停止测试警报对话框操作.是否可以解决意图并启动活动属性超出了此特定测试用例的范围.

标签：android,robolectric
来源： https://codeday.me/bug/20190823/1698336.html