Login code

Main Application code

Resource file activity_login

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools">
<data>
    <variable
        name="loginViewModel"
        type="be.ysebie.multimedlembeke_app.login.LoginViewModel" />
</data>
    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <TextView
                android:id="@+id/emailLabel"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_marginStart="24dp"
                android:layout_marginEnd="24dp"
                android:text="@string/email"
                android:textAlignment="center"
                app:layout_constraintBottom_toTopOf="@+id/emailtextbox"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.0"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintVertical_bias="0.921" />

            <EditText
                android:id="@+id/emailtextbox"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_marginStart="24dp"
                android:layout_marginEnd="24dp"
                android:layout_marginBottom="44dp"
                android:autofillHints="@string/emailhints"
                android:ems="10"
                android:gravity="center"
                android:hint="@string/emailhints"
                android:inputType="textEmailAddress"
                app:layout_constraintBottom_toTopOf="@+id/passwordlabel"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.0"
                app:layout_constraintStart_toStartOf="parent"
                tools:targetApi="o" />

            <TextView
                android:id="@+id/passwordlabel"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_marginStart="24dp"
                android:layout_marginEnd="24dp"
                android:layout_marginBottom="24dp"
                android:text="@string/wachtwoord"
                android:textAlignment="center"
                app:layout_constraintBottom_toTopOf="@+id/passwordTextBox"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.0"
                app:layout_constraintStart_toStartOf="parent" />

            <EditText
                android:id="@+id/passwordTextBox"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_marginStart="24dp"
                android:layout_marginEnd="24dp"
                android:layout_marginBottom="56dp"
                android:autofillHints="@string/wachtwoordhints"
                android:ems="10"
                android:gravity="center"
                android:hint="@string/wachtwoordhints"
                android:inputType="textPassword"
                app:layout_constraintBottom_toTopOf="@+id/loginbutton"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="1.0"
                app:layout_constraintStart_toStartOf="parent"
                tools:targetApi="o" />

            <Button
                android:id="@+id/loginbutton"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginBottom="22dp"
                android:autofillHints="Druk op die knop om u in te loggen."
                android:text="@string/login"
                android:textAlignment="center"
                android:textColor="#FFFFFF"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.499"
                app:layout_constraintStart_toStartOf="parent"
                tools:targetApi="o" />

            <TextView
                android:id="@+id/errorTextLogin"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginStart="24dp"
                android:layout_marginTop="80dp"
                android:layout_marginEnd="24dp"
                android:layout_marginBottom="6dp"
                android:gravity="center"
                android:text="@string/ongeldigheidsstring"
                android:textColor="#FF0000"
                android:visibility="invisible"
                app:layout_constraintBottom_toTopOf="@+id/loginbutton"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.492"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="@+id/passwordTextBox"
                app:layout_constraintVertical_bias="0.0" />

            <TextView
                android:id="@+id/Welkomtekst"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginStart="24dp"
                android:layout_marginEnd="24dp"
                android:text="@string/welkom"
                android:textAlignment="center"
                android:textSize="30sp"
                app:layout_constraintBottom_toTopOf="@+id/emailLabel"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent" />
        </androidx.constraintlayout.widget.ConstraintLayout>

        <ImageView
        android:id="@+id/imageView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:contentDescription="@string/multimedtext"
        app:srcCompat="@drawable/custom_progress" />
    </FrameLayout>
</layout>

LoginLocator.kt
package be.ysebie.multimedlembeke_app

import android.content.Context
import androidx.annotation.VisibleForTesting
import be.ysebie.multimedlembeke_app.repositories.ILoginRepository
import be.ysebie.multimedlembeke_app.repositories.LoginRepository

object LoginLocator {
    @Volatile
    var loginRepository: ILoginRepository?=null
    @VisibleForTesting set

    fun provideLoginRepository(context: Context):ILoginRepository{
        synchronized(this) {
            return loginRepository ?: createLoginRepository()
        }
    }

    private fun createLoginRepository(): ILoginRepository {
        return LoginRepository()
    }
}

Activity MainActivity changes to be added to OnCreate:
//ophalen informatie van de gebruiker
        val sharedPreferences = this.getSharedPreferences("User", Context.MODE_PRIVATE)
        if(sharedPreferences.contains("currentUser")){
            val encodeduser : String = sharedPreferences.getString("currentUser", "") ?: ""
            try{
                expirationDate = JWTUtils.getExpiracyDate(encodeduser)
                if(expirationDate.after(Date())){
                    val mEditor = sharedPreferences.edit()
                    val userValue = "currentUser"
                    mEditor.remove(userValue)
                    val email = sharedPreferences.getString("email",null)
                    val password = sharedPreferences.getString("password",null)
                    if(!email.isNullOrEmpty() || !password.isNullOrEmpty()){
                        val givenEmail = email ?: ""
                        val givenPassword = password ?: ""
                        val loginRepository = LoginRepository()
                        val loginViewModel = LoginViewModel(loginRepository)
                        loginViewModel.login(givenEmail, givenPassword)
                        mEditor.putString(userValue, loginViewModel.authenticationKey.toString())
                    } else{
                        switchToLogin()
                    }
                    switchToLogin()
                }
            }catch(e: UnsupportedEncodingException){

            }
        }else{
            switchToLogin()
        }
Activity MainActivity added method:
fun switchToLogin(){
        val intent = Intent(this, LoginActivity::class.java)
        intent.putExtra("hi", "HI")
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
        startActivity(intent)
    }

Login/LoginViewModel.kt
package be.ysebie.multimedlembeke_app.login

import android.app.Application
import android.util.Log
import androidx.lifecycle.LiveData
import androidx.lifecycle.MutableLiveData
import androidx.lifecycle.ViewModel
import be.ysebie.multimedlembeke_app.database.LocalDb
import be.ysebie.multimedlembeke_app.database.getDatabase
import be.ysebie.multimedlembeke_app.repositories.ILoginRepository
import be.ysebie.multimedlembeke_app.repositories.LoginRepository
import kotlinx.coroutines.*
import retrofit2.Response
import java.io.Console

class LoginViewModel(private val loginRepository: ILoginRepository) : ViewModel() {

    private var _authenticationKey = MutableLiveData<Any?>()

    val authenticationKey: LiveData<Any?>
        get() = _authenticationKey

    fun login(email: String, password: String) = runBlocking{
       _authenticationKey.value = loginRepository.login(email,password)
    }
}

login/LoginViewModelFactory.kt
package be.ysebie.multimedlembeke_app.login

import androidx.lifecycle.ViewModel
import androidx.lifecycle.ViewModelProvider
import be.ysebie.multimedlembeke_app.repositories.ILoginRepository
import be.ysebie.multimedlembeke_app.repositories.LoginRepository
import java.lang.IllegalArgumentException

@Suppress("UNCHECKED CAST")
class LoginViewModelFactory(private val loginRepository: ILoginRepository): ViewModelProvider.Factory {
    override fun <T : ViewModel?> create(modelClass: Class<T>): T {
        if(modelClass.isAssignableFrom(LoginViewModel::class.java)){
            return LoginViewModel(loginRepository) as T
        }
        throw IllegalArgumentException("Unknown ViewModelClass")
    }
}

login/LoginRepository.kt
package be.ysebie.multimedlembeke_app.repositories

import androidx.lifecycle.LiveData
import androidx.lifecycle.MutableLiveData
import be.ysebie.multimedlembeke_app.network.LoginUser
import be.ysebie.multimedlembeke_app.network.Web
import kotlinx.coroutines.*
import retrofit2.Response


interface ILoginRepository {
    suspend fun login(email: String, password: String): Any?
}

class LoginRepository : ILoginRepository {

    override suspend fun login(email: String, password: String):Any?{
        return withContext(Dispatchers.IO){
            val accountDealer = Web.retrofitService.getAccount(LoginUser(email, password))
            val result = accountDealer.execute()
            result.body()
        }
    }
}

network/WebService.kt
import com.jakewharton.retrofit2.adapter.kotlin.coroutines.CoroutineCallAdapterFactory
import com.squareup.moshi.Moshi
import com.squareup.moshi.kotlin.reflect.KotlinJsonAdapterFactory
import be.ysebie.multimedlembeke_app.domain.Challenge
import retrofit2.Call
import retrofit2.Retrofit
import retrofit2.converter.moshi.MoshiConverterFactory
import retrofit2.http.Body
import retrofit2.http.GET
import retrofit2.http.POST
import retrofit2.http.Query

private const val BASE_URL="https://api.ysebie.be/api/"

private val moshi = Moshi.Builder().add(KotlinJsonAdapterFactory()).build()

private val retrofit = Retrofit.Builder().addConverterFactory(MoshiConverterFactory.create(moshi)).addCallAdapterFactory(CoroutineCallAdapterFactory()).baseUrl(BASE_URL).build()

interface WebService{
    //TODO Logic om te communiceren met de API
    @GET("Challenge")
    fun getTaken(@Query("employeeId") employeeId: String) : Call<Challenge>
    @POST("Account")
    fun getAccount(@Body user:LoginUser): Call<Any>
}

object Web{
    val retrofitService: WebService by lazy{
        retrofit.create(WebService::class.java)
    }

androidTest code

data/FakeLoginRepository.kt
package be.ysebie.multimedlembeke_app.data

import be.ysebie.multimedlembeke_app.repositories.ILoginRepository

class FakeLoginRepository(var datasource: Any?) : ILoginRepository {
    override suspend fun login(email: String, password: String): Any? {
        return datasource
    }

}

LoginActivityFalseTest.kt
import be.ysebie.multimedlembeke_app.data.FakeLoginRepository
import org.junit.Before
import org.junit.Test

class LoginActivityFalseTest {
    private lateinit var badrepository: FakeLoginRepository

    @Before
    fun initRepositories(){
        badrepository = FakeLoginRepository(null)
        LoginLocator.loginRepository = badrepository
    }

    @Test
    fun falseTestAssertsSavingsAndNewActivity() {
        ActivityScenario.launch<LoginActivity>(LoginActivity::class.java)
        Espresso.onView(ViewMatchers.withId(R.id.errorTextLogin)).check(matches(
            withEffectiveVisibility(ViewMatchers.Visibility.INVISIBLE)))
        Espresso.onView(ViewMatchers.withId(R.id.emailtextbox))
            .perform(ViewActions.replaceText("abc@aol.com"))
        Espresso.onView(ViewMatchers.withId(R.id.passwordTextBox))
            .perform(ViewActions.replaceText("Nederland1-"))
        Espresso.onView(ViewMatchers.withId(R.id.loginbutton)).perform(ViewActions.click())
        Espresso.onView(ViewMatchers.withId(R.id.errorTextLogin)).check(matches(
            withEffectiveVisibility(ViewMatchers.Visibility.VISIBLE)))
    }
}

LoginActivityTrueTest.kt

package be.ysebie.multimedlembeke_app

import android.app.Activity
import android.content.Context
import android.content.Intent
import android.content.SharedPreferences
import android.os.Bundle
import android.os.Looper
import androidx.test.core.app.ActivityScenario
import androidx.test.espresso.Espresso
import androidx.test.espresso.Espresso.onData
import androidx.test.espresso.Espresso.onView
import androidx.test.espresso.action.ViewActions.click
import androidx.test.espresso.action.ViewActions.replaceText
import androidx.test.espresso.matcher.ViewMatchers.withId
import androidx.test.ext.junit.runners.AndroidJUnit4
import androidx.test.filters.MediumTest
import be.ysebie.multimedlembeke_app.data.FakeLoginRepository
import be.ysebie.multimedlembeke_app.repositories.LoginRepository
import com.google.common.truth.Truth.assertThat
import kotlinx.coroutines.ExperimentalCoroutinesApi
import org.junit.Before
import org.junit.Test
import org.junit.runner.RunWith
import java.security.AccessController.getContext

@MediumTest
class LoginActivityTrueTest{

    private lateinit var goodrepository: FakeLoginRepository

    @Before
    fun initRepositories(){
        goodrepository = FakeLoginRepository(mutableListOf("token=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiZXhwIjoxNTE2MjM5MDIyfQ.E9bQ6QAil4HpH825QC5PtjNGEDQTtMpcj0SO2W8vmag"))
        LoginLocator.loginRepository = goodrepository
    }

    @Test
    fun trueTestAssertsSavingsAndNewActivity() {
        ActivityScenario.launch<LoginActivity>(LoginActivity::class.java)
        onView(withId(R.id.emailtextbox)).perform(replaceText("rpullerjt@edublogs.org"))
        onView(withId(R.id.passwordTextBox)).perform(replaceText("Test123!"))
        onView(withId(R.id.loginbutton)).perform(click())
        onView(withId(R.layout.fragment_challenge_details_overview_fragment))
    }
}