我该如何做一个单元测试SetOnClickListener

Question

我想通过setOnClickListener（android studio）对Java代码进行单元测试，但我做不到！有人可以给我一些例子吗？

public class MainActivity extends AppCompatActivity {

    private Button btnStart;
    private Button btnConsult;
    private Button btnSales;



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

        // Call the SQLite Connection
        ConnectionSQLite.getInstance(this);


        this.btnStart = (Button) findViewById(R.id.btnStart);

        this.btnConsult = (Button) findViewById(R.id.btnConsult);

        this.btnSales = (Button) findViewById(R.id.btnSales);



        // The button to start the application
        this.btnStart.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(MainActivity.this, ProductActivity.class);
                startActivity(intent);
            }
        });

        // The button to consult the list of products
        this.btnConsult.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(MainActivity.this, ProductListActivity.class);
                startActivity(intent);
            }
        });

        // The button to buy products
        this.btnSales.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(MainActivity.this, SalesActivity.class);
                startActivity(intent);
            }
        });



    }
}