For #17655: Do not pass threshold if showTopFrecentSites is false. (#17657)

* For #17655: Do not pass threshold if showTopFrecentSites is false.

* For #17655: Add unit tests for getTopSitesConfig.

app/src/main/java/org/mozilla/fenix/home/HomeFragment.kt

@@ -21,6 +21,7 @@ import android.view.accessibility.AccessibilityEvent
 import android.widget.Button
 import android.widget.LinearLayout
 import android.widget.PopupWindow
+import androidx.annotation.VisibleForTesting
 import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.content.res.AppCompatResources
 import androidx.constraintlayout.widget.ConstraintLayout
@@ -273,11 +274,12 @@ class HomeFragment : Fragment() {
      * Returns a [TopSitesConfig] which specifies how many top sites to display and whether or
      * not frequently visited sites should be displayed.
      */
-    private fun getTopSitesConfig(): TopSitesConfig {
+    @VisibleForTesting
+    internal fun getTopSitesConfig(): TopSitesConfig {
         val settings = requireContext().settings()
         return TopSitesConfig(
             settings.topSitesMaxLimit,
-            FrecencyThresholdOption.SKIP_ONE_TIME_PAGES
+            if (settings.showTopFrecentSites) FrecencyThresholdOption.SKIP_ONE_TIME_PAGES else null
         )
     }
 
@@ -428,7 +430,8 @@ class HomeFragment : Fragment() {
                     if (searchEngine != null) {
                         val iconSize =
                             requireContext().resources.getDimensionPixelSize(R.dimen.preference_icon_drawable_size)
-                        val searchIcon = BitmapDrawable(requireContext().resources, searchEngine.icon)
+                        val searchIcon =
+                            BitmapDrawable(requireContext().resources, searchEngine.icon)
                         searchIcon.setBounds(0, 0, iconSize, iconSize)
                         search_engine_icon?.setImageDrawable(searchIcon)
                     } else {

app/src/test/java/org/mozilla/fenix/home/HomeFragmentTest.kt

@@ -0,0 +1,68 @@
+/* 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.home
+
+import android.content.Context
+import io.mockk.every
+import io.mockk.mockk
+import io.mockk.spyk
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import org.junit.Assert
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mozilla.fenix.ext.settings
+import org.mozilla.fenix.helpers.FenixRobolectricTestRunner
+import org.mozilla.fenix.utils.Settings
+
+@ExperimentalCoroutinesApi
+@RunWith(FenixRobolectricTestRunner::class)
+class HomeFragmentTest {
+
+    private lateinit var settings: Settings
+    private lateinit var context: Context
+    private lateinit var homeFragment: HomeFragment
+
+    @Before
+    fun setup() {
+        context = mockk(relaxed = true)
+        settings = mockk(relaxed = true)
+
+        homeFragment = spyk(HomeFragment())
+
+        every { homeFragment.context } returns context
+        every { context.settings() } returns settings
+    }
+
+    @Test
+    fun `GIVEN showTopFrecentSites is false WHEN getTopSitesConfig is called THEN it returns TopSitesConfig with null frecencyConfig`() {
+        every { settings.showTopFrecentSites } returns false
+        every { settings.topSitesMaxLimit } returns 10
+
+        val topSitesConfig = homeFragment.getTopSitesConfig()
+
+        Assert.assertNull(topSitesConfig.frecencyConfig)
+    }
+
+    @Test
+    fun `GIVEN showTopFrecentSites is true WHEN getTopSitesConfig is called THEN it returns TopSitesConfig with non-null frecencyConfig`() {
+        every { context.settings().showTopFrecentSites } returns true
+        every { settings.topSitesMaxLimit } returns 10
+
+        val topSitesConfig = homeFragment.getTopSitesConfig()
+
+        Assert.assertNotNull(topSitesConfig.frecencyConfig)
+    }
+
+    @Test
+    fun `GIVEN a topSitesMaxLimit WHEN getTopSitesConfig is called THEN it returns TopSitesConfig with totalSites = topSitesMaxLimit`() {
+        val topSitesMaxLimit = 10
+        every { settings.topSitesMaxLimit } returns topSitesMaxLimit
+
+        val topSitesConfig = homeFragment.getTopSitesConfig()
+
+        Assert.assertEquals(topSitesMaxLimit, topSitesConfig.totalSites)
+    }
+}