Add tests for about viewholder

app/src/test/java/org/mozilla/fenix/settings/about/viewholders/AboutItemViewHolderTest.kt

@@ -0,0 +1,51 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package org.mozilla.fenix.settings.about.viewholders
+
+import android.view.LayoutInflater
+import android.view.View
+import io.mockk.mockk
+import io.mockk.verify
+import kotlinx.android.synthetic.main.about_list_item.view.*
+import mozilla.components.support.test.robolectric.testContext
+import org.junit.Assert.assertEquals
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mozilla.fenix.helpers.FenixRobolectricTestRunner
+import org.mozilla.fenix.settings.about.AboutItem
+import org.mozilla.fenix.settings.about.AboutPageItem
+import org.mozilla.fenix.settings.about.AboutPageListener
+
+@RunWith(FenixRobolectricTestRunner::class)
+class AboutItemViewHolderTest {
+
+    private val item = AboutPageItem.Item(AboutItem.Libraries, "Libraries")
+    private lateinit var view: View
+    private lateinit var listener: AboutPageListener
+
+    @Before
+    fun setup() {
+        view = LayoutInflater.from(testContext).inflate(AboutItemViewHolder.LAYOUT_ID, null)
+        listener = mockk(relaxed = true)
+    }
+
+    @Test
+    fun `bind title`() {
+        val holder = AboutItemViewHolder(view, listener)
+        holder.bind(item)
+
+        assertEquals("Libraries", view.about_item_title.text)
+    }
+
+    @Test
+    fun `call listener on click`() {
+        val holder = AboutItemViewHolder(view, listener)
+        holder.bind(item)
+        view.performClick()
+
+        verify { listener.onAboutItemClicked(AboutItem.Libraries) }
+    }
+}

app/src/test/java/org/mozilla/fenix/settings/logins/LoginDetailViewTest.kt

@@ -52,4 +52,13 @@ class LoginDetailViewTest {
         assertEquals("admin", view.usernameText.text)
         assertEquals("password", view.passwordText.text)
     }
+
+    @Test
+    fun `bind null currentItem`() {
+        detailView.update(state.copy(currentItem = null))
+
+        assertEquals("", view.webAddressText.text)
+        assertEquals("", view.usernameText.text)
+        assertEquals("", view.passwordText.text)
+    }
 }