[FIXED] Create a Java Unit Test from a Login class written in Android Studio

Issue

can someone please help me with a java unit test for this class. I've tried many times but the result is not working, so I hope that you can help me.

public class Login extends AppCompatActivity {

    EditText email, password;
    Button login_button;
    TextView goToReg;
    ProgressBar progressBar;
    FirebaseAuth fAuth;

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

        email = findViewById( R.id.emailLog );
        password = findViewById( R.id.passwordLog );
        login_button = findViewById( R.id.buttonLog );
        goToReg = findViewById( R.id.gotoregistration );
        progressBar = findViewById( R.id.progressBarLog );

        fAuth = FirebaseAuth.getInstance();

        login_button.setOnClickListener( new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String mail = email.getText().toString().trim();
                String password_string = password.getText().toString().trim(); 

                if(TextUtils.isEmpty(mail))
                {
                    email.setError("Email requested!");
                    return;
                }
                if(TextUtils.isEmpty( password_string ))
                {
                    password.setError( "Password requested!" );
                    return;
                }
                if(password_string.length()<6)
                {
                    password.setError( " password must have more than 5 characters" );
                    return;
                }
                progressBar.setVisibility( View.VISIBLE );

                // User authentication
                fAuth.signInWithEmailAndPassword( mail, password_string ).addOnCompleteListener( new OnCompleteListener<AuthResult>() {
                    @Override
                    public void onComplete(@NonNull Task<AuthResult> task) {
                        if(task.isSuccessful()) {
                            Toast.makeText( Login.this, "Login done.", Toast.LENGTH_SHORT ).show();
                            startActivity( new Intent( getApplicationContext(), MainActivity.class ) );
                        }else{
                            Toast.makeText( Login.this, "Error: "+task.getException().getMessage(), Toast.LENGTH_SHORT ).show();
                            progressBar.setVisibility( View.INVISIBLE );
                        }
                    }
                });
            }
        } );

        goToReg.setOnClickListener( new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startActivity( new Intent( getApplicationContext(), Registration.class ) );
            }
        } );
    }
}

This is a Login class for my app written on Android Studio, there are also others classes that I have to test and are similiar to this class, so I hope someone can make an example using this Login class and create a JUnit test example, so that I can understand the process. Thank you.

Solution

You would simply test if your login works according to the data you send in.

Please view the following here for further advice. For example, it would be something like:

email = findViewById( R.id.emailLog );
password = findViewById( R.id.passwordLog );                
email.setText("email");
pass.setText("pass");
login_button = findViewById( R.id.buttonLog );
loginBtn.performClick();
assertTrue(loginActivity.isCurUserLoggedIn());

I haven't tested this so do let me know if this example works for you.

Answered By - UnknownStackOverFlow
Answer Checked By - Marilyn (JavaFixing Volunteer)