Viewmodel unit tests updated

app/build.gradle

@@ -19,9 +19,9 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
-    testOptions {
-        unitTests.returnDefaultValues = true
-    }
+//    testOptions {
+//        unitTests.returnDefaultValues = true
+//    }
     dataBinding {
         enabled = true
     }

app/src/main/java/com/appttude/h_mal/easycc/ui/main/MainViewModel.kt

@@ -30,7 +30,7 @@ class MainViewModel(
     val operationStartedListener = MutableLiveData<Boolean>()
     val operationFinishedListener = MutableLiveData<Pair<Boolean, String?>>()
 
-    private var conversionRate: Double = 0.00
+    private var conversionRate: Double = 1.00
 
     private fun getExchangeRate(){
         operationStartedListener.postValue(true)

app/src/test/java/com/appttude/h_mal/easycc/OneTimeObserver.kt

@@ -0,0 +1,21 @@
+package com.appttude.h_mal.easycc
+
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.LifecycleOwner
+import androidx.lifecycle.LifecycleRegistry
+import androidx.lifecycle.Observer
+
+class OneTimeObserver<T>(private val handler: (T) -> Unit) : Observer<T>, LifecycleOwner {
+    private val lifecycle = LifecycleRegistry(this)
+
+    init {
+        lifecycle.handleLifecycleEvent(Lifecycle.Event.ON_RESUME)
+    }
+
+    override fun getLifecycle(): Lifecycle = lifecycle
+
+    override fun onChanged(t: T) {
+        handler(t)
+        lifecycle.handleLifecycleEvent(Lifecycle.Event.ON_DESTROY)
+    }
+}

app/src/test/java/com/appttude/h_mal/easycc/ui/main/MainViewModelTest.kt

@@ -0,0 +1,233 @@
+package com.appttude.h_mal.easycc.ui.main
+
+import android.os.Bundle
+import android.util.Log
+import androidx.arch.core.executor.testing.InstantTaskExecutorRule
+import com.appttude.h_mal.easycc.data.network.response.ResponseObject
+import com.appttude.h_mal.easycc.data.repository.Repository
+import com.appttude.h_mal.easycc.models.CurrencyObject
+import kotlinx.coroutines.runBlocking
+import org.junit.Before
+import com.appttude.h_mal.easycc.utils.observeOnce
+import org.junit.Assert.*
+import org.junit.Rule
+import org.junit.Test
+import org.mockito.Mock
+import org.mockito.Mockito
+import org.mockito.Mockito.mock
+import org.mockito.MockitoAnnotations
+import kotlin.time.seconds
+
+class MainViewModelTest {
+
+    // Run tasks synchronously
+    @get:Rule
+    val instantTaskExecutorRule: InstantTaskExecutorRule = InstantTaskExecutorRule()
+
+    lateinit var viewModel: MainViewModel
+
+    @Mock
+    lateinit var repository: Repository
+
+    @Before
+    fun setUp() {
+        MockitoAnnotations.initMocks(this)
+        viewModel = MainViewModel(repository)
+    }
+
+    @Test
+    fun initiate_validBundleValues_successResponse() = runBlocking{
+        //GIVEN
+        val currencyOne = "AUD - Australian Dollar"
+        val currencyTwo = "GBP - British Pound"
+        val bundle = mock(Bundle()::class.java)
+        val responseObject = mock(ResponseObject::class.java)
+
+        //WHEN
+        Mockito.`when`(bundle.getString("parse_1")).thenReturn(currencyOne)
+        Mockito.`when`(bundle.getString("parse_2")).thenReturn(currencyTwo)
+        Mockito.`when`(repository.getData(currencyOne, currencyTwo)).thenReturn(responseObject)
+
+        //THEN
+        viewModel.initiate(bundle)
+        viewModel.operationStartedListener.observeOnce {
+            assertEquals(true, it)
+        }
+        viewModel.operationFinishedListener.observeOnce {
+            assertEquals(true, it.first)
+            Log.i("tag", "${it.first}  ${it.second}")
+            assertNull(it.second)
+        }
+    }
+
+    @Test
+    fun initiate_invalidBundleValues_successfulResponse() = runBlocking{
+        //GIVEN
+        val currencyOne = "AUD - Australian Dollar"
+        val currencyTwo = "GBP - British Pound"
+        val pair = Pair(currencyOne, currencyTwo)
+        val responseObject = mock(ResponseObject::class.java)
+
+        //WHEN
+        Mockito.`when`(repository.getConversionPair()).thenReturn(pair)
+        Mockito.`when`(repository.getData(currencyOne, currencyTwo)).thenReturn(responseObject)
+
+        //THEN
+        viewModel.initiate(null)
+        viewModel.operationStartedListener.observeOnce {
+            assertEquals(true, it)
+        }
+        viewModel.operationFinishedListener.observeOnce {
+            assertEquals(true, it.first)
+            assertNull(it.second)
+        }
+    }
+
+    @Test
+    fun initiate_sameBundleValues_successfulResponse() = runBlocking{
+        //GIVEN
+        val currencyOne = "AUD - Australian Dollar"
+        val bundle = mock(Bundle()::class.java)
+
+        //WHEN
+        Mockito.`when`(bundle.getString("parse_1")).thenReturn(null)
+        Mockito.`when`(bundle.getString("parse_2")).thenReturn(null)
+        Mockito.`when`(repository.getConversionPair()).thenReturn(Pair(currencyOne, currencyOne))
+
+        //THEN
+        viewModel.initiate(bundle)
+        viewModel.operationStartedListener.observeOnce {
+            assertEquals(true, it)
+        }
+        viewModel.operationFinishedListener.observeOnce {
+            assertEquals(true, it.first)
+            assertNull(it.second)
+        }
+    }
+
+    @Test
+    fun initiate_invalidValues_unsuccessfulResponse() = runBlocking {
+        //GIVEN
+        val bundle = mock(Bundle()::class.java)
+
+        //WHEN
+        Mockito.`when`(bundle.getString("parse_1")).thenReturn(null)
+        Mockito.`when`(bundle.getString("parse_2")).thenReturn(null)
+        Mockito.`when`(repository.getConversionPair()).thenReturn(Pair(null, null))
+
+        //THEN
+        viewModel.initiate(bundle)
+        viewModel.operationStartedListener.observeOnce {
+            assertEquals(true, it)
+        }
+        viewModel.operationFinishedListener.observeOnce {
+            assertEquals(false, it.first)
+            assertEquals("Select currencies", it.second)
+        }
+    }
+
+
+
+    @Test
+    fun setCurrencyName_validValues_successResponse() = runBlocking{
+        //GIVEN
+        val currencyOne = "AUD - Australian Dollar"
+        val currencyTwo = "GBP - British Pound"
+        viewModel.rateIdTo = currencyTwo
+        val tag = "top"
+        val responseObject = mock(ResponseObject::class.java)
+
+        //WHEN
+        Mockito.`when`(repository.getData(currencyOne, currencyTwo)).thenReturn(responseObject)
+
+        //THEN
+        viewModel.setCurrencyName(tag, currencyOne)
+        viewModel.operationStartedListener.observeOnce {
+            assertEquals(true, it)
+        }
+        viewModel.operationFinishedListener.observeOnce {
+            assertEquals(true, it.first)
+            Log.i("tag", "${it.first}  ${it.second}")
+            assertNull(it.second)
+        }
+    }
+
+    @Test
+    fun setCurrencyName_sameValues_successfulResponse() = runBlocking{
+        //GIVEN
+        val currencyOne = "AUD - Australian Dollar"
+        val currencyTwo = "GBP - British Pound"
+        viewModel.rateIdTo = currencyOne
+        val tag = "top"
+        val responseObject = mock(ResponseObject::class.java)
+
+        //WHEN
+        Mockito.`when`(repository.getData(currencyOne, currencyTwo)).thenReturn(responseObject)
+
+        //THEN
+        viewModel.setCurrencyName(tag, currencyOne)
+        viewModel.operationStartedListener.observeOnce {
+            assertEquals(true, it)
+        }
+        viewModel.operationFinishedListener.observeOnce {
+            assertEquals(true, it.first)
+            assertNull(it.second)
+        }
+    }
+
+    @Test
+    fun setCurrencyName_invalidValues_unsuccessfulResponse() = runBlocking{
+        //GIVEN
+        val currencyOne = "AUD - Australian Dollar"
+        val currencyTwo = "GBP - British Pound"
+        val tag = "top"
+        val responseObject = mock(ResponseObject::class.java)
+
+        //WHEN
+        Mockito.`when`(repository.getData(currencyOne, currencyTwo)).thenReturn(responseObject)
+
+        //THEN
+        viewModel.setCurrencyName(tag, currencyOne)
+        viewModel.operationStartedListener.observeOnce {
+            assertEquals(true, it)
+        }
+        viewModel.operationFinishedListener.observeOnce {
+            assertEquals(false, it.first)
+            assertNotNull(it.second)
+        }
+    }
+
+    @Test
+    fun getConversion_validValue_successfulResponse() {
+        //GIVEN
+        val inputDouble = "2.0"
+
+        //THEN
+        val returnVal = viewModel.getConversion(inputDouble)
+        assertEquals(returnVal, inputDouble)
+    }
+
+    @Test
+    fun getConversion_invalidValue_unsuccessfulResponse() {
+        //THEN
+        val returnVal = viewModel.getConversion("t")
+        assertNull(returnVal)
+    }
+
+    @Test
+    fun getReciprocalConversion_validValue_successfulResponse() {
+        //GIVEN
+        val inputDouble = "2.0"
+
+        //THEN
+        val returnVal = viewModel.getReciprocalConversion(inputDouble)
+        assertEquals(returnVal, "2.0")
+    }
+
+    @Test
+    fun getReciprocalConversion_invalidValue_unsuccessfulResponse() {
+        //THEN
+        val returnVal = viewModel.getReciprocalConversion("t")
+        assertNull(returnVal)
+    }
+}

app/src/test/java/com/appttude/h_mal/easycc/ui/widget/WidgetViewModelTest.kt

@@ -0,0 +1,118 @@
+package com.appttude.h_mal.easycc.ui.widget
+
+import androidx.arch.core.executor.testing.InstantTaskExecutorRule
+import com.appttude.h_mal.easycc.data.repository.Repository
+import com.appttude.h_mal.easycc.utils.observeOnce
+import org.junit.Before
+import org.junit.Assert.*
+import org.junit.Rule
+import org.junit.Test
+import org.mockito.Mock
+import org.mockito.Mockito
+import org.mockito.Mockito.mock
+import org.mockito.MockitoAnnotations
+
+private const val currencyOne = "AUD - Australian Dollar"
+private const val currencyTwo = "GBP - British Pound"
+class WidgetViewModelTest {
+
+    // Run tasks synchronously
+    @get:Rule
+    val instantTaskExecutorRule: InstantTaskExecutorRule = InstantTaskExecutorRule()
+
+    lateinit var viewModel: WidgetViewModel
+
+    @Mock
+    lateinit var repository: Repository
+
+    @Before
+    fun setUp() {
+        MockitoAnnotations.initMocks(this)
+        viewModel = WidgetViewModel(repository)
+    }
+
+    @Test
+    fun initiate_validInput_successfulResponse() {
+        //GIVEN
+        val appId = 123
+        val pair = Pair(currencyOne,currencyTwo)
+
+        //WHEN
+        Mockito.`when`(repository.getWidgetConversionPairs(appId)).thenReturn(pair)
+
+        //THEN
+        viewModel.initiate(123)
+        assertEquals(viewModel.rateIdFrom, currencyOne)
+        assertEquals(viewModel.rateIdTo, currencyTwo)
+    }
+
+    @Test
+    fun initiate_validInputNoWidgetPair_successfulResponse() {
+        //GIVEN
+        val appId = 123
+        val pair = mock(Pair::class.java)
+        val array = arrayOf(currencyOne)
+
+        //WHEN
+        Mockito.`when`(repository.getWidgetConversionPairs(appId)).thenAnswer { pair }
+        Mockito.`when`(repository.getWidgetConversionPairs(appId).first).thenReturn(null)
+        Mockito.`when`(repository.getWidgetConversionPairs(appId).second).thenReturn(null)
+        Mockito.`when`(repository.getArrayList()).thenReturn(array)
+
+        //THEN
+        viewModel.initiate(123)
+        assertEquals(viewModel.rateIdFrom, currencyOne)
+        assertEquals(viewModel.rateIdTo, currencyOne)
+    }
+
+    @Test
+    fun getSubmitDialogMessage_validInput_successfulResponse() {
+        //GIVEN
+        viewModel.rateIdFrom = currencyOne
+        viewModel.rateIdTo = currencyTwo
+
+        //THEN
+        val dialogResult = viewModel.getSubmitDialogMessage()
+        assertEquals(dialogResult, "Create widget for AUDGBP?")
+
+    }
+
+    @Test
+    fun submitSelectionOnClick_validInput_successfulResponse() {
+        //GIVEN
+        viewModel.rateIdFrom = currencyOne
+        viewModel.rateIdTo = currencyTwo
+
+        //THEN
+        viewModel.submitSelectionOnClick()
+        viewModel.operationFinishedListener.observeOnce {
+            assertEquals(it.first, true)
+            assertNull(it.second)
+        }
+    }
+
+    @Test
+    fun submitSelectionOnClick_invalidInput_unsuccessfulResponse() {
+        //GIVEN
+        viewModel.rateIdFrom = currencyOne
+        viewModel.rateIdTo = currencyOne
+
+        //THEN
+        viewModel.submitSelectionOnClick()
+        viewModel.operationFinishedListener.observeOnce {
+            assertEquals(it.first, false)
+            assertNotNull(it.second)
+        }
+    }
+
+    @Test
+    fun submitSelectionOnClick_noInput_unsuccessfulResponse() {
+
+        //THEN
+        viewModel.submitSelectionOnClick()
+        viewModel.operationFinishedListener.observeOnce {
+            assertEquals(it.first, false)
+            assertNotNull(it.second)
+        }
+    }
+}

app/src/test/java/com/appttude/h_mal/easycc/utils/TestUtils.kt

@@ -0,0 +1,9 @@
+package com.appttude.h_mal.easycc.utils
+
+import androidx.lifecycle.LiveData
+import com.appttude.h_mal.easycc.OneTimeObserver
+
+fun <T> LiveData<T>.observeOnce(onChangeHandler: (T) -> Unit) {
+    val observer = OneTimeObserver(handler = onChangeHandler)
+    observe(observer, observer)
+}