Add a node-builder test for DefaultSecureBackupSetupEntryPoint

The new entry point had no test, leaving its createNode body (and the api
Inputs data class) uncovered and failing codecov/patch. Mirror the existing
Default*EntryPointTest convention to exercise the builder.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

features/securebackup/impl/src/test/kotlin/io/element/android/features/securebackup/impl/DefaultSecureBackupSetupEntryPointTest.kt

@@ -0,0 +1,57 @@
+/*
+ * 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.features.securebackup.impl
+
+import androidx.arch.core.executor.testing.InstantTaskExecutorRule
+import com.bumble.appyx.core.modality.BuildContext
+import com.bumble.appyx.testing.junit4.util.MainDispatcherRule
+import com.google.common.truth.Truth.assertThat
+import io.element.android.features.securebackup.api.SecureBackupSetupEntryPoint
+import io.element.android.features.securebackup.impl.setup.SecureBackupSetupNode
+import io.element.android.features.securebackup.impl.setup.SecureBackupSetupPresenter
+import io.element.android.features.securebackup.impl.setup.SecureBackupSetupStateMachine
+import io.element.android.libraries.designsystem.utils.snackbar.SnackbarDispatcher
+import io.element.android.libraries.matrix.test.encryption.FakeEncryptionService
+import io.element.android.tests.testutils.node.TestParentNode
+import org.junit.Rule
+import org.junit.Test
+
+class DefaultSecureBackupSetupEntryPointTest {
+    @get:Rule
+    val instantTaskExecutorRule = InstantTaskExecutorRule()
+
+    @get:Rule
+    val mainDispatcherRule = MainDispatcherRule()
+
+    @Test
+    fun `test node builder`() {
+        val entryPoint = DefaultSecureBackupSetupEntryPoint()
+        val parentNode = TestParentNode.create { buildContext, plugins ->
+            SecureBackupSetupNode(
+                buildContext = buildContext,
+                plugins = plugins,
+                presenterFactory = object : SecureBackupSetupPresenter.Factory {
+                    override fun create(isChangeRecoveryKeyUserStory: Boolean) = SecureBackupSetupPresenter(
+                        isChangeRecoveryKeyUserStory = isChangeRecoveryKeyUserStory,
+                        stateMachine = SecureBackupSetupStateMachine(),
+                        encryptionService = FakeEncryptionService(),
+                    )
+                },
+                snackbarDispatcher = SnackbarDispatcher(),
+            )
+        }
+        val inputs = SecureBackupSetupEntryPoint.Inputs(isChangeRecoveryKeyUserStory = true)
+        val result = entryPoint.createNode(
+            parentNode = parentNode,
+            buildContext = BuildContext.root(null),
+            inputs = inputs,
+        )
+        assertThat(result).isInstanceOf(SecureBackupSetupNode::class.java)
+        assertThat(result.plugins).contains(SecureBackupSetupNode.Inputs(isChangeRecoveryKeyUserStory = true))
+    }
+}