Add few more tests for campaign module (commons-app#4384)

Author: madhurgupta10

app/src/test/kotlin/fr/free/nrw/commons/campaigns/CampaignViewUnitTests.kt

@@ -0,0 +1,89 @@
+package fr.free.nrw.commons.campaigns
+
+import android.app.Activity
+import android.view.View
+import fr.free.nrw.commons.TestAppAdapter
+import fr.free.nrw.commons.TestCommonsApplication
+import fr.free.nrw.commons.contributions.MainActivity
+import org.junit.Assert
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.Mock
+import org.mockito.MockitoAnnotations
+import org.robolectric.Robolectric
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.android.controller.ActivityController
+import org.robolectric.annotation.Config
+import org.wikipedia.AppAdapter
+import java.lang.reflect.Method
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [21], application = TestCommonsApplication::class)
+class CampaignViewUnitTests {
+
+    private lateinit var activityController: ActivityController<Activity>
+    private lateinit var activity: MainActivity
+    private lateinit var campaignView: CampaignView
+    private lateinit var campaign: Campaign
+
+    @Mock
+    private lateinit var view: View
+
+    @Before
+    fun setUp() {
+        MockitoAnnotations.initMocks(this)
+
+        AppAdapter.set(TestAppAdapter())
+
+        activityController = Robolectric.buildActivity(Activity::class.java)
+        activity = Robolectric.buildActivity(MainActivity::class.java).create().get()
+
+        campaignView = CampaignView(activity)
+        campaignView = CampaignView(activity, null)
+        campaignView = CampaignView(activity, null, 0)
+    }
+
+    @Test
+    @Throws(Exception::class)
+    fun checkNotNull() {
+        Assert.assertNotNull(campaignView)
+    }
+
+    @Test
+    @Throws(Exception::class)
+    fun testSetCampaignNonNullNonException() {
+        campaign = Campaign("", "", "2000-01-01", "2000-01-02", "")
+        campaignView.setCampaign(campaign)
+    }
+
+    @Test
+    @Throws(Exception::class)
+    fun testSetCampaignNonNullException() {
+        campaign = Campaign("", "", "", "", "")
+        campaignView.setCampaign(campaign)
+    }
+
+    @Test
+    @Throws(Exception::class)
+    fun testSetCampaignNull() {
+        campaignView.setCampaign(null)
+    }
+
+    @Test
+    @Throws(Exception::class)
+    fun testOnSwipe() {
+        campaignView.onSwipe(view)
+    }
+
+    @Test
+    @Throws(Exception::class)
+    fun testInit() {
+        val method: Method = CampaignView::class.java.getDeclaredMethod(
+            "init"
+        )
+        method.isAccessible = true
+        method.invoke(campaignView)
+    }
+
+}

app/src/test/kotlin/fr/free/nrw/commons/campaigns/CampaignsPresenterTest.kt

@@ -3,12 +3,14 @@ package fr.free.nrw.commons.campaigns
 import com.nhaarman.mockitokotlin2.verify
 import fr.free.nrw.commons.mwapi.OkHttpJsonApiClient
 import io.reactivex.Single
+import io.reactivex.disposables.Disposable
 import io.reactivex.schedulers.TestScheduler
 import org.junit.Before
 import org.junit.Test
 import org.mockito.Mock
 import org.mockito.Mockito
 import org.mockito.MockitoAnnotations
+import java.lang.reflect.Field
 import java.text.SimpleDateFormat
 import java.util.*
 import kotlin.collections.ArrayList
@@ -31,6 +33,9 @@ class CampaignsPresenterTest {
 
     lateinit var testScheduler: TestScheduler
 
+    @Mock
+    private lateinit var disposable: Disposable
+
     /**
      * initial setup, test environment
      */
@@ -74,4 +79,30 @@ class CampaignsPresenterTest {
         testScheduler.triggerActions()
         verify(view).showCampaigns(campaign)
     }
+
+    @Test
+    fun testGetCampaignsNonNull() {
+        val campaignField: Field =
+            CampaignsPresenter::class.java.getDeclaredField("campaign")
+        campaignField.isAccessible = true
+        campaignField.set(campaignsPresenter, campaign)
+        campaignsPresenter.getCampaigns()
+    }
+
+    @Test
+    @Throws(Exception::class)
+    fun testOnDetachViewNull() {
+        campaignsPresenter.onDetachView()
+    }
+
+    @Test
+    @Throws(Exception::class)
+    fun testOnDetachViewNonNull() {
+        val disposableField: Field =
+            CampaignsPresenter::class.java.getDeclaredField("disposable")
+        disposableField.isAccessible = true
+        disposableField.set(campaignsPresenter, disposable)
+        campaignsPresenter.onDetachView()
+    }
+
 }