View binding added, basic repository unit tests added

app/build.gradle

@@ -24,6 +24,10 @@ android {
         }
     }
 
+    dataBinding {
+        enabled = true
+    }
+
 }
 
 dependencies {
@@ -37,6 +41,8 @@ dependencies {
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+    //mockito
+    testImplementation 'org.mockito:mockito-inline:2.13.0'
 
     //Retrofit and GSON
     implementation 'com.squareup.retrofit2:retrofit:2.6.0'
@@ -56,11 +62,7 @@ dependencies {
     implementation "org.kodein.di:kodein-di-generic-jvm:6.2.1"
     implementation "org.kodein.di:kodein-di-framework-android-x:6.2.1"
 
-    //Android Room
-    implementation "androidx.room:room-runtime:2.2.5"
-    implementation "androidx.room:room-ktx:2.2.5"
-    kapt "androidx.room:room-compiler:2.2.5"
-
+    //recycler view item data binding
     implementation 'com.xwray:groupie:2.3.0'
     implementation 'com.xwray:groupie-kotlin-android-extensions:2.3.0'
     implementation 'com.xwray:groupie-databinding:2.3.0'

app/src/main/java/com/example/h_mal/candyspace/ui/main/CompletionListener.kt

@@ -3,5 +3,5 @@ package com.example.h_mal.candyspace.ui.main
 interface CompletionListener {
     fun onStarted()
     fun onSuccess()
-    fun onFailure()
+    fun onFailure(message: String)
 }

app/src/main/java/com/example/h_mal/candyspace/ui/main/MainFragment.kt

@@ -1,14 +1,28 @@
 package com.example.h_mal.candyspace.ui.main
 
-import androidx.lifecycle.ViewModelProviders
 import android.os.Bundle
-import androidx.fragment.app.Fragment
+
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import androidx.databinding.DataBindingUtil
+import androidx.fragment.app.Fragment
+import androidx.lifecycle.ViewModelProvider
 import com.example.h_mal.candyspace.R
+import com.example.h_mal.candyspace.databinding.MainFragmentBinding
+import org.kodein.di.Kodein
+import org.kodein.di.KodeinAware
+import org.kodein.di.android.kodein
+import org.kodein.di.generic.instance
 
-class MainFragment : Fragment() {
+/*
+* UI for the first screen holding the list, search box
+*/
+class MainFragment : Fragment(), KodeinAware{
+
+    //retrieve the viewmodel factory from the kodein dependency injection
+    override val kodein by lazy { (context as KodeinAware).kodein }
+    private val factory : MainViewModelFactory by instance()
 
     companion object {
         fun newInstance() = MainFragment()
@@ -18,13 +32,20 @@ class MainFragment : Fragment() {
 
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?,
                               savedInstanceState: Bundle?): View {
-        return inflater.inflate(R.layout.main_fragment, container, false)
+        //retrieve viewmodel from viewmodel factory
+        viewModel = ViewModelProvider(this, factory).get(MainViewModel::class.java)
+        //Bind layout to Viewmodel
+        val binding: MainFragmentBinding = DataBindingUtil.inflate(inflater, R.layout.main_fragment, container, false)
+        binding.viewmodel = viewModel
+
+        return binding.root
     }
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         super.onActivityCreated(savedInstanceState)
-        viewModel = ViewModelProviders.of(this).get(MainViewModel::class.java)
-        // TODO: Use the ViewModel
+
     }
 
+
+
 }

app/src/main/java/com/example/h_mal/candyspace/ui/main/MainViewModel.kt

@@ -3,6 +3,10 @@ package com.example.h_mal.candyspace.ui.main
 import android.view.View
 import androidx.lifecycle.ViewModel
 import com.example.h_mal.candyspace.data.repositories.Repository
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import java.io.IOException
 
 class MainViewModel(
     private val repository: Repository
@@ -10,7 +14,26 @@ class MainViewModel(
 
     var searchString: String? = null
 
-    fun submit(view: View){
+    val completionListener: CompletionListener? = null
 
+    fun submit(view: View){
+        completionListener?.onStarted()
+        if (searchString.isNullOrEmpty()){
+            completionListener?.onFailure("Search box is empty")
+            return
+        }
+
+        CoroutineScope(Dispatchers.Main).launch {
+            try {
+                val user = repository.getUsers(searchString!!)
+                //todo: update live data
+
+                //successfully finished
+                completionListener?.onSuccess()
+            }catch (e: IOException){
+                completionListener?.onFailure(e.message!!)
+            }
+            completionListener?.onFailure("Failed to retrieve Users")
+        }
     }
 }

app/src/main/java/com/example/h_mal/candyspace/ui/main/MainViewModelFactory.kt

@@ -0,0 +1,15 @@
+package com.example.h_mal.candyspace.ui.main
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import com.example.h_mal.candyspace.data.repositories.Repository
+
+@Suppress("UNCHECKED_CAST")
+class MainViewModelFactory(
+    private val repository: Repository
+) : ViewModelProvider.NewInstanceFactory(){
+
+    override fun <T : ViewModel?> create(modelClass: Class<T>): T {
+        return MainViewModel(repository) as T
+    }
+}

app/src/main/res/layout/main_fragment.xml

@@ -1,47 +1,56 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<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"
-    android:id="@+id/main"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    tools:context=".ui.main.MainFragment">
+    xmlns:tools="http://schemas.android.com/tools">
 
-    <LinearLayout
+    <data>
+        <variable
+            name="viewmodel"
+            type="com.example.h_mal.candyspace.ui.main.MainViewModel" />
+    </data>
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:id="@+id/main"
         android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent"
-        android:layout_margin="4dp"
-        android:orientation="horizontal"
-        android:id="@+id/container">
-        <EditText
-            android:id="@+id/search_bar"
-            android:layout_weight="1"
-            android:layout_width="0dp"
-            android:layout_height="wrap_content" />
-
-        <Button
-            android:id="@+id/submit"
-            android:layout_width="wrap_content"
+        android:layout_height="match_parent"
+        tools:context=".ui.main.MainFragment">
+        <LinearLayout
+            android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            app:layout_constraintStart_toEndOf="@id/search_bar"
             app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toTopOf="parent"
-            android:text="Submit"/>
-    </LinearLayout>
+            android:layout_margin="4dp"
+            android:orientation="horizontal"
+            android:id="@+id/container">
+            <EditText
+                android:id="@+id/search_bar"
+                android:layout_weight="1"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content" />
 
-    <view class="androidx.appcompat.app.AlertController$RecycleListView"
-        android:id="@+id/recycler_view"
-        android:layout_width="match_parent"
-        android:layout_height="0dp"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/container"
-        tools:listitem="@android:layout/simple_list_item_2">
+            <Button
+                android:id="@+id/submit"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                app:layout_constraintStart_toEndOf="@id/search_bar"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintTop_toTopOf="parent"
+                android:text="Submit"/>
+        </LinearLayout>
 
-    </view>
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/recycler_view"
+            android:layout_width="match_parent"
+            android:layout_height="0dp"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/container"
+            tools:listitem="@android:layout/simple_list_item_2">
 
-</androidx.constraintlayout.widget.ConstraintLayout>
+        </androidx.recyclerview.widget.RecyclerView>
+
+    </androidx.constraintlayout.widget.ConstraintLayout>
+
+</layout>

app/src/test/java/com/example/h_mal/candyspace/data/repositories/RepositoryTest.kt

@@ -1,12 +1,65 @@
 package com.example.h_mal.candyspace.data.repositories
 
+import android.util.Log
+import com.example.h_mal.candyspace.data.api.ApiClass
+import com.example.h_mal.candyspace.data.api.User
+import com.google.gson.Gson
+import kotlinx.coroutines.runBlocking
+import okhttp3.MediaType
+import okhttp3.ResponseBody
 import org.junit.Before
 
 import org.junit.Assert.*
+import org.junit.Test
+import org.mockito.ArgumentMatchers
+import org.mockito.Mock
+import org.mockito.Mockito
+import org.mockito.Mockito.mock
+import org.mockito.MockitoAnnotations
+import retrofit2.Response
 
 class RepositoryTest {
 
+    lateinit var repository: Repository
+
+    @Mock
+    lateinit var api: ApiClass
+
     @Before
     fun setUp() {
+        MockitoAnnotations.initMocks(this)
+        repository = Repository(api)
+    }
+
+    @Test
+    fun fetchUserFromApi_positiveResponse() = runBlocking {
+        val mockUser = mock(User::class.java)
+        val mockResponse = Response.success(mockUser)
+
+        Mockito.`when`(api.getUsersFromApi("12345")).thenReturn(
+            mockResponse
+        )
+
+        val getUser = repository.getUsers("12345")
+
+        assertNotNull(getUser)
+        assertEquals(mockUser, getUser)
+    }
+
+    @Test
+    fun fetchUserFromApi_negativeResponse() = runBlocking {
+        val mockResponse = Response.error<User>(403,
+            ResponseBody.create(
+                MediaType.parse("application/json"),
+                "{\"key\":[\"somestuff\"]}"
+            ))
+
+
+        Mockito.`when`(api.getUsersFromApi("12345")).thenReturn(
+            mockResponse
+        )
+
+        val getUser = repository.getUsers("12345")
+        assertNotNull(getUser)
     }
 }