Selecting an entry in Spinner

[sourc...@gmail.com]

Hi,

I'm trying to select an option entry (of custom objects) from a Spinner with espresso UI testing. However do not seem to be able to get it to work in any way.

The code I use is shown below,

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        LinearLayout linearLayout = (LinearLayout) findViewById(R.id.layout_root);

        DropDownView dropDownView;
        final ArrayAdapter<MyValue> adapter;

        dropDownView = new DropDownView(this);
        dropDownView.setId(R.id.dropdown_view);

        dropDownView.setHint("title");

        MyValueList list = new MyValueList();
        list.addEntry("First", "1");
        list.addEntry("Second", "2");
        list.addEntry("Third", "3");
        list.addEntry("Fourth", "4");
        list.addEntry("Fifth", "5");
        list.addEntry("Sixth", "6");
        list.addEntry("Seven", "7");
        list.addEntry("Eight", "8");
        list.addEntry("Nine", "9");
        list.addEntry("Ten", "10");
        list.addEntry("Eleven", "11");
        list.addEntry("Twelve", "12");
        list.addEntry("Thirteen", "13");
        list.addEntry("Fourteen", "14");
        list.addEntry("Fifteen", "15");
        list.addEntry("Sixteen", "16");
        list.addEntry("Seventeen", "17");
        list.addEntry("Eighteen", "18");
        list.addEntry("Nineteen", "19");
        list.addEntry("Twenty", "20");
        list.addEntry("twentyone", "21");

        adapter = new ArrayAdapter<>(this,
                R.layout.dropdown_selected_item,
                list.getList());
        adapter.setDropDownViewResource(R.layout.dropdown_item);
        dropDownView.setAdapter(adapter);

        dropDownView.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                Log.d("MySpinnerTest", "current = " + adapter.getItem(position));
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {
            }
        });

        linearLayout.addView(dropDownView);
    }

    public class MyValue {
        String name;
        String code;

        public MyValue(String name, String code) {
            this.name = name;
            this.code = code;
        }

        @Override
        public String toString() {
            return name;
        }
    }

    public class MyValueList {
        List<MyValue> myValueList;
        public MyValueList() {
            myValueList = new ArrayList<>();
        }
        public void addEntry(String name, String code) {
            myValueList.add(new MyValue(name, code));
        }
        public ArrayList<MyValue> getList() {
            return (ArrayList<MyValue>) myValueList;
        }
    }

}

where DropDownView is a compound view with a textview (for title) and a spinner,

public class DropDownView extends LinearLayoutCompat {

    private TextView mTitleTextView;
    private Spinner mSpinnerView;

    public DropDownView(Context context) {
        this(context, null, 0);
    }
    public DropDownView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }
    public DropDownView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);

        setOrientation(VERTICAL);

        mTitleTextView = new TextView(context);
        mTitleTextView.setId(R.id.dropdown_title_view);
        mTitleTextView.setTextSize(TypedValue.COMPLEX_UNIT_SP, 14);
        mTitleTextView.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                mSpinnerView.performClick();
            }
        });

        mSpinnerView = new Spinner(context);
        mSpinnerView.setId(R.id.dropdown_spinner_view);

        addView(mTitleTextView);
        addView(mSpinnerView);
    }
    public void setHint(CharSequence hint) {
        mTitleTextView.setText(hint);
    }
    public void setAdapter(SpinnerAdapter adapter) {
        mSpinnerView.setAdapter(adapter);
    }
    public void setOnItemSelectedListener(AdapterView.OnItemSelectedListener l) {
        mSpinnerView.setOnItemSelectedListener(l);
    }
}

I have tried with the below but get an Exception ("android.support.test.espresso.PerformException: Error performing 'load adapter data' on view 'is assignable from class: class android.widget.AdapterView'.")

onView(withId(R.id.dropdown_view)).perform(click());
onData(withSpinnerText("Twenty")).perform(click());

Could anyone please help with how I could click on the entry (Twenty) in this list? Any help appreciated.