Move FakeNodeFactoriesBindings to the testutils module

The fake was declared in RootFlowNodeTest, so other tests could not use
it. Move it to the testutils module, in a new node package.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

appnav/src/test/kotlin/io/element/android/appnav/RootFlowNodeTest.kt

@@ -42,7 +42,6 @@ import io.element.android.features.share.test.FakeShareIntentHandler
 import io.element.android.features.signedout.test.FakeSignedOutEntryPoint
 import io.element.android.libraries.accountselect.test.FakeAccountSelectEntryPoint
 import io.element.android.libraries.architecture.AssistedNodeFactory
-import io.element.android.libraries.architecture.NodeFactoriesBindings
 import io.element.android.libraries.di.DependencyInjectionGraphOwner
 import io.element.android.libraries.featureflag.test.FakeFeatureFlagService
 import io.element.android.libraries.matrix.test.FakeSdkMetadata
@@ -57,6 +56,7 @@ import io.element.android.libraries.sessionstorage.test.InMemorySessionStore
 import io.element.android.services.analytics.test.FakeAnalyticsService
 import io.element.android.services.analytics.test.watchers.FakeAnalyticsColdStartWatcher
 import io.element.android.services.apperror.test.FakeAppErrorStateService
+import io.element.android.tests.testutils.node.FakeNodeFactoriesBindings
 import io.element.android.tests.testutils.presenter.NotUsedPresenter
 import io.element.android.tests.testutils.robolectric.RobolectricTest
 import kotlinx.coroutines.ExperimentalCoroutinesApi
@@ -65,7 +65,6 @@ import kotlinx.coroutines.test.runCurrent
 import kotlinx.coroutines.test.runTest
 import org.junit.Rule
 import org.junit.Test
-import kotlin.reflect.KClass
 
 class RootFlowNodeTest : RobolectricTest() {
     @get:Rule
@@ -194,12 +193,6 @@ private val A_LOGIN_ENTRY_POINT_PARAMS = LoginEntryPoint.Params(
     loginHint = A_LOGIN_PARAMS.loginHint,
 )
 
-private class FakeNodeFactoriesBindings(
-    private val nodeFactories: Map<KClass<out Node>, AssistedNodeFactory<*>>,
-) : NodeFactoriesBindings {
-    override fun nodeFactories() = nodeFactories
-}
-
 /**
  * [RootFlowNode] creates its children using the dependency injection graph of its ancestors, so it needs a parent
  * owning a graph able to create a [NotLoggedInFlowNode].

tests/testutils/src/main/kotlin/io/element/android/tests/testutils/node/FakeNodeFactoriesBindings.kt

@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2026 Element Creations Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.tests.testutils.node
+
+import com.bumble.appyx.core.node.Node
+import io.element.android.libraries.architecture.AssistedNodeFactory
+import io.element.android.libraries.architecture.NodeFactoriesBindings
+import kotlin.reflect.KClass
+
+class FakeNodeFactoriesBindings(
+    private val nodeFactories: Map<KClass<out Node>, AssistedNodeFactory<*>>,
+) : NodeFactoriesBindings {
+    override fun nodeFactories() = nodeFactories
+}