Test of android class with activity

We have some class DemoAppFragment which in its methods works with resources, so it must be attached to activity. This class is correct and application is working. But how to test such classes? For example we create some test class which extends ActivityInstrumentationTestCase2 so this class with test is attached to activity. But when we call in this test methods of the Fragment class it throws Exception java.lang.IllegalStateException: Fragment DemoAppFragment{50597af} not attached to Activity. What the correct way of testing this class because I haven't understanding how it must work?

Class for test:

package com.gsma.mobileconnect.r2.android.demo.fragments;


import android.os.Bundle;
import android.support.design.widget.BottomSheetBehavior;
import android.support.design.widget.TextInputEditText;
import android.support.design.widget.TextInputLayout;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.Switch;


import com.gsma.mobileconnect.r2.android.demo.R;
import com.gsma.mobileconnect.r2.android.demo.activity.MainActivity;
import com.gsma.mobileconnect.r2.android.demo.interfaces.OnBackPressedListener;
import com.gsma.mobileconnect.r2.constants.Scopes;
import com.gsma.mobileconnect.r2.discovery.DiscoveryResponse;

import com.gsma.mobileconnect.r2.android.demo.utils.IpUtils;

public class DemoAppFragment extends BaseAuthFragment implements OnBackPressedListener{

private android.support.v7.widget.CardView bottomRequestOptions;
private android.support.v7.widget.CardView bottomRequestParams;
private BottomSheetBehavior mBottomSheetOptionsConfig;
private BottomSheetBehavior mBottomSheetParamsConfig;

private Button btnRequestOptions;
private Button btnRequestParams;

private Switch switchAddress;
private Switch switchEmail;
private Switch switchPhone;
private Switch switchProfile;
private Switch switchNationality;
private Switch switchPhoneNumber;
private Switch switchSingUp;

private RadioButton rbAuthentication;
private RadioButton rbAuthorization;

private TextInputEditText etMsisdn;
private TextInputLayout msisdnLayout;

private CheckBox cbMsisdn;

private EditText etClientId;
private EditText etClientSecret;
private EditText etDiscoveryUrl;
private EditText etRedirectUrl;
private EditText etXRedirect;

private Button btnMobileConnect;

private String authType;

private TextInputEditText etIp;
private TextInputLayout ipLayout;
private CheckBox cbXSourceIp;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {

    final View view = inflater.inflate(R.layout.fragment_demo_app, container, false);

    init(view);
    connectMobileDemo();

    checkVisibilityOfSwitchesAndAuthType();

    btnRequestOptions.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (mBottomSheetOptionsConfig.getState() != mBottomSheetOptionsConfig.STATE_EXPANDED) {
                mBottomSheetOptionsConfig.setState(mBottomSheetOptionsConfig.STATE_EXPANDED);
            }
            else {
                mBottomSheetOptionsConfig.setState(mBottomSheetOptionsConfig.STATE_HIDDEN);
            }


        }
    });

    btnRequestParams.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            mBottomSheetParamsConfig.setState(mBottomSheetParamsConfig.STATE_EXPANDED);
        }
    });




    rbAuthorization.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            checkVisibilityOfSwitchesAndAuthType();
        }
    });

    rbAuthentication.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            checkVisibilityOfSwitchesAndAuthType();
        }
    });

    cbMsisdn.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
            if (cbMsisdn.isChecked()) {
                msisdnLayout.setVisibility(View.VISIBLE);
                etMsisdn.setText(getResources().getString(R.string.msisdn));
            } else {
                msisdnLayout.setVisibility(View.GONE);
                etMsisdn.setText(null);
            }
        }
    });

    cbXSourceIp.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
            if (cbXSourceIp.isChecked()) {
                ipLayout.setVisibility(View.VISIBLE);
                etIp.setText(IpUtils.getIPAddress(true));
            } else {
                ipLayout.setVisibility(View.GONE);
                etIp.setText(null);
            }
        }
    });

    btnMobileConnect.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            sendRequest();
        }
    });

    setupHelpListeners();

    return view;
}



private void init(View view) {

    bottomRequestOptions = (android.support.v7.widget.CardView)view.findViewById(R.id.bottom_sheet_demo_app_options);
    bottomRequestParams = (android.support.v7.widget.CardView)view.findViewById(R.id.bottom_sheet_demo_app_params);
    mBottomSheetOptionsConfig = BottomSheetBehavior.from(bottomRequestOptions);
    mBottomSheetParamsConfig = BottomSheetBehavior.from(bottomRequestParams);
    btnRequestOptions = (Button)view.findViewById(R.id.btnRequestOptions);
    btnRequestParams = (Button)view.findViewById(R.id.btnRequestParametersDemo);
    switchAddress = (Switch)view.findViewById(R.id.switch_address);
    switchEmail = (Switch)view.findViewById(R.id.switch_email);
    switchPhone = (Switch)view.findViewById(R.id.switch_phone);
    switchProfile = (Switch)view.findViewById(R.id.switch_profile);
    switchNationality = (Switch)view.findViewById(R.id.switch_nationality);
    switchPhoneNumber = (Switch)view.findViewById(R.id.switch_phone_number);
    switchSingUp = (Switch)view.findViewById(R.id.switch_sign_up);
    rbAuthentication = (RadioButton)view.findViewById(R.id.RBauthentication);
    rbAuthorization = (RadioButton)view.findViewById(R.id.RBauthorization);

    etMsisdn = (TextInputEditText) view.findViewById(R.id.etMsisdnDemo);
    msisdnLayout = (TextInputLayout) view.findViewById(R.id.layoutMsisdnDemo);
    cbMsisdn = (CheckBox)view.findViewById(R.id.encrypted_msisdn);

    btnMobileConnect = (Button)view.findViewById(R.id.btnMCDemo);

    etClientId = (EditText)view.findViewById(R.id.client_id_field);
    etClientSecret = (EditText)view.findViewById(R.id.client_secret_field);
    etDiscoveryUrl = (EditText)view.findViewById(R.id.client_discovery_url);
    etRedirectUrl = (EditText)view.findViewById(R.id.client_redirect_url);
    etXRedirect = (EditText)view.findViewById(R.id.client_x_redirect);

    etClientId.setText(getResources().getString(R.string.client_id));
    etClientSecret.setText(getResources().getString(R.string.client_secret));
    etDiscoveryUrl.setText(getResources().getString(R.string.discovery_url));
    etRedirectUrl.setText(getResources().getString(R.string.redirect_url));
    etXRedirect.setText(getResources().getString(R.string.x_redirect));

    cbXSourceIp = (CheckBox)view.findViewById(R.id.cbIp);
    etIp = (TextInputEditText) view.findViewById(R.id.etIpDemo);
    ipLayout = (TextInputLayout) view.findViewById(R.id.layoutIpDemo);

}

private void sendRequest () {

    String msisdn = null;
    String xSourceIp = null;

    if (cbMsisdn.isChecked()) {
        msisdn = etMsisdn.getText().toString();
    }

    if (cbXSourceIp.isChecked()) {
        xSourceIp = etIp.getText().toString();
    }

    final StringBuilder scopesStringBuilder = new StringBuilder(authType);

    if (authType.equals(Scopes.MOBILECONNECTAUTHENTICATION)) {
        setUserInfoScopes(scopesStringBuilder);
    }

    if (authType.equals(Scopes.MOBILECONNECTAUTHORIZATION)) {
        setIdentityScopes(scopesStringBuilder);
    }

    scopes = scopesStringBuilder;

    makeDiscoveryDemo(msisdn, xSourceIp);
}


private void setUserInfoScopes(StringBuilder scopesStringBuilder) {
    if (switchAddress != null && switchAddress.isChecked()) {
        scopesStringBuilder.append(" address");
    }
    if (switchEmail != null && switchEmail.isChecked()) {
        scopesStringBuilder.append(" email");
    }
    if (switchPhone != null && switchPhone.isChecked()) {
        scopesStringBuilder.append(" phone");
    }
    if (switchProfile != null && switchProfile.isChecked()) {
        scopesStringBuilder.append(" profile");
    }
}

private void setIdentityScopes(StringBuilder scopesStringBuilder) {
    if (switchNationality != null && switchNationality.isChecked()) {
        scopesStringBuilder.append(String.format(" %s", Scopes.MOBILECONNECTIDENTITYNATIONALID));
    }
    if (switchPhoneNumber != null && switchPhoneNumber.isChecked()) {
        scopesStringBuilder.append(String.format(" %s", Scopes.MOBILECONNECTIDENTITYPHONE));
    }
    if (switchSingUp != null && switchSingUp.isChecked()) {
        scopesStringBuilder.append(String.format(" %s", Scopes.MOBILECONNECTIDENTITYSIGNUP));
    }
}

private void checkVisibilityOfSwitchesAndAuthType() {
    if(rbAuthentication.isChecked()) {
        switchNationality.setVisibility(View.GONE);
        switchPhoneNumber.setVisibility(View.GONE);
        switchSingUp.setVisibility(View.GONE);

        switchNationality.setChecked(false);
        switchPhoneNumber.setChecked(false);
        switchSingUp.setChecked(false);
        switchAddress.setVisibility(View.VISIBLE);
        switchEmail.setVisibility(View.VISIBLE);
        switchPhone.setVisibility(View.VISIBLE);
        switchProfile.setVisibility(View.VISIBLE);
        authType = Scopes.MOBILECONNECTAUTHENTICATION;
    } else {
        switchNationality.setVisibility(View.VISIBLE);
        switchPhoneNumber.setVisibility(View.VISIBLE);
        switchSingUp.setVisibility(View.VISIBLE);


        switchAddress.setChecked(false);
        switchEmail.setChecked(false);
        switchPhone.setChecked(false);
        switchProfile.setChecked(false);
        switchAddress.setVisibility(View.GONE);
        switchEmail.setVisibility(View.GONE);
        switchPhone.setVisibility(View.GONE);
        switchProfile.setVisibility(View.GONE);
        authType = Scopes.MOBILECONNECTAUTHORIZATION;
    }
}

@Override
public void onBackPressed() {
    if (mBottomSheetOptionsConfig.getState() == mBottomSheetOptionsConfig.STATE_EXPANDED) {
        mBottomSheetOptionsConfig.setState(mBottomSheetOptionsConfig.STATE_HIDDEN);
    }
    else if (mBottomSheetParamsConfig.getState() == mBottomSheetParamsConfig.STATE_EXPANDED) {
        mBottomSheetParamsConfig.setState(mBottomSheetParamsConfig.STATE_HIDDEN);
    } else {
        getActivity().onBackPressed();
    }
}

@Override
public void onComplete(DiscoveryResponse discoveryResponse) {
    super.onComplete(mobileConnectStatus);
}

private void setupHelpListeners () {

    cbXSourceIp.setOnLongClickListener(new View.OnLongClickListener() {
        @Override
        public boolean onLongClick(View view) {
            ((MainActivity)getActivity()).makeToast(getString(R.string.help_x_source_ip), true);
            return true;
        }
    });

    cbMsisdn.setOnLongClickListener(new View.OnLongClickListener() {
        @Override
        public boolean onLongClick(View view) {
            ((MainActivity)getActivity()).makeToast(getString(R.string.help_msisdn), true);
            return true;
        }
    });


    rbAuthentication.setOnLongClickListener(new View.OnLongClickListener() {
        @Override
        public boolean onLongClick(View view) {
            ((MainActivity)getActivity()).makeAlert(getString(R.string.authentication), getString(R.string.help_authentication));
            return true;
        }
    });

    rbAuthorization.setOnLongClickListener(new View.OnLongClickListener() {
        @Override
        public boolean onLongClick(View view) {
            ((MainActivity)getActivity()).makeAlert(getString(R.string.authorization), getString(R.string.help_authorization));
            return true;
        }
    });

}

}

Test:

public class ConnectMobileWithoutDiscoveryTest extends ActivityInstrumentationTestCase2<MainActivity> {

    private DemoAppFragment baseAuthFragmentRealization = new DemoAppFragment();

    public ConnectMobileWithoutDiscoveryTest() {
        super("class", MainActivity.class);
    }

    public void setUp() throws Exception {
        super.setUp();
        getActivity();
    }

    public void testRun() throws Exception {


        baseAuthFragmentRealization.connectMobileWithoutDiscovery();

    }
}