add initial state test

features/messenger/src/test/kotlin/app/dapk/st/messenger/gallery/state/ImageGalleryReducerTest.kt

@@ -0,0 +1,54 @@
+package app.dapk.st.messenger.gallery.state
+
+import app.dapk.st.core.Lce
+import app.dapk.st.design.components.SpiderPage
+import app.dapk.st.messenger.gallery.FetchMediaFoldersUseCase
+import app.dapk.st.messenger.gallery.FetchMediaUseCase
+import app.dapk.st.messenger.gallery.PageContainer
+import app.dapk.state.Combined2
+import fake.FakeJobBag
+import io.mockk.mockk
+import org.junit.Test
+import test.testReducer
+
+private const val A_ROOM_NAME = "a room name"
+
+class ImageGalleryReducerTest {
+
+    private val fakeJobBag = FakeJobBag()
+
+    private val runReducerTest = testReducer { _: (Unit) -> Unit ->
+        imageGalleryReducer(
+            A_ROOM_NAME,
+            FakeFetchMediaFoldersUseCase().instance,
+            FakeFetchMediaUseCase().instance,
+            fakeJobBag.instance,
+        )
+    }
+
+    @Test
+    fun `initial state is folders page`() = runReducerTest {
+        assertInitialState(
+            Combined2(
+                state1 = PageContainer(
+                    SpiderPage(
+                        route = ImageGalleryPage.Routes.folders,
+                        label = "Send to $A_ROOM_NAME",
+                        parent = null,
+                        state = ImageGalleryPage.Folders(Lce.Loading())
+                    )
+                ),
+                state2 = Unit
+            )
+        )
+    }
+
+}
+
+class FakeFetchMediaFoldersUseCase {
+    val instance = mockk<FetchMediaFoldersUseCase>()
+}
+
+class FakeFetchMediaUseCase {
+    val instance = mockk<FetchMediaUseCase>()
+}