For #25980: Use new extension function to get fragment's NavController.

app/src/main/java/org/mozilla/fenix/ext/Fragment.kt

@@ -11,7 +11,6 @@ import androidx.appcompat.app.AppCompatActivity
 import androidx.fragment.app.Fragment
 import androidx.navigation.NavDirections
 import androidx.navigation.NavOptions
-import androidx.navigation.fragment.NavHostFragment.findNavController
 import androidx.navigation.fragment.findNavController
 import mozilla.components.concept.base.crash.Breadcrumb
 import org.mozilla.fenix.NavHostActivity
@@ -25,7 +24,7 @@ val Fragment.requireComponents: Components
     get() = requireContext().components
 
 fun Fragment.nav(@IdRes id: Int?, directions: NavDirections, options: NavOptions? = null) {
-    findNavController(this).nav(id, directions, options)
+    findNavController().nav(id, directions, options)
 }
 
 fun Fragment.getPreferenceKey(@StringRes resourceId: Int): String = getString(resourceId)

app/src/test/java/org/mozilla/fenix/ext/FragmentTest.kt

@@ -10,7 +10,7 @@ import androidx.navigation.NavDestination
 import androidx.navigation.NavDirections
 import androidx.navigation.NavOptions
 import androidx.navigation.Navigator.Extras
-import androidx.navigation.fragment.NavHostFragment
+import androidx.navigation.fragment.findNavController
 import io.mockk.Runs
 import io.mockk.confirmVerified
 import io.mockk.every
@@ -38,31 +38,31 @@ class FragmentTest {
 
     @Before
     fun setup() {
-        mockkStatic(NavHostFragment::class)
-        every { (NavHostFragment.findNavController(mockFragment)) } returns navController
-        every { (NavHostFragment.findNavController(mockFragment).currentDestination) } returns mockDestination
+        mockkStatic("androidx.navigation.fragment.FragmentKt")
+        every { (mockFragment.findNavController()) } returns navController
+        every { (mockFragment.findNavController().currentDestination) } returns mockDestination
         every { (mockDestination.id) } returns mockId
         every { (navController.currentDestination) } returns mockDestination
-        every { (NavHostFragment.findNavController(mockFragment).currentDestination?.id) } answers { (mockDestination.id) }
+        every { (mockFragment.findNavController().currentDestination?.id) } answers { (mockDestination.id) }
     }
 
     @Test
     fun `Test nav fun with ID and directions`() {
-        every { (NavHostFragment.findNavController(mockFragment).navigate(navDirections, null)) } just Runs
+        every { (mockFragment.findNavController().navigate(navDirections, null)) } just Runs
 
         mockFragment.nav(mockId, navDirections)
-        verify { (NavHostFragment.findNavController(mockFragment).currentDestination) }
-        verify { (NavHostFragment.findNavController(mockFragment).navigate(navDirections, null)) }
+        verify { (mockFragment.findNavController().currentDestination) }
+        verify { (mockFragment.findNavController().navigate(navDirections, null)) }
         confirmVerified(mockFragment)
     }
 
     @Test
     fun `Test nav fun with ID, directions, and options`() {
-        every { (NavHostFragment.findNavController(mockFragment).navigate(navDirections, mockOptions)) } just Runs
+        every { (mockFragment.findNavController().navigate(navDirections, mockOptions)) } just Runs
 
         mockFragment.nav(mockId, navDirections, mockOptions)
-        verify { (NavHostFragment.findNavController(mockFragment).currentDestination) }
-        verify { (NavHostFragment.findNavController(mockFragment).navigate(navDirections, mockOptions)) }
+        verify { (mockFragment.findNavController().currentDestination) }
+        verify { (mockFragment.findNavController().navigate(navDirections, mockOptions)) }
         confirmVerified(mockFragment)
     }
 }