Keep sent messages visible until received

app/androidApp/src/test/kotlin/com/example/aiapp/PendingMessagesTest.kt

@@ -0,0 +1,62 @@
+package com.example.aiapp
+
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertTrue
+
+class PendingMessagesTest {
+    private fun local(text: String = "keep this") =
+        QueuedMessage("local-1", text, emptyList(), local = true)
+
+    @Test
+    fun a_server_queue_replaces_the_local_bridge_instead_of_duplicating_it() {
+        val queued =
+            reconcileQueuedMessage(
+                listOf(local()),
+                SessionEvent.MessageQueued("server-1", "keep this", emptyList()),
+            )
+
+        assertEquals(1, queued.size)
+        assertEquals("server-1", queued.single().id)
+        assertTrue(!queued.single().local)
+    }
+
+    @Test
+    fun an_immediately_received_message_removes_its_local_bridge() {
+        val queued =
+            reconcileUserMessage(
+                listOf(local()),
+                SessionEvent.UserMessage("keep this", id = null, attachments = emptyList()),
+            )
+
+        assertTrue(queued.isEmpty())
+    }
+
+    @Test
+    fun a_transport_failure_stays_on_its_message() {
+        val queued = markPendingFailure(listOf(local()), "local-1", "Can't reach the server")
+
+        assertEquals("Can't reach the server", queued.single().refusal)
+        assertTrue(queued.single().local)
+    }
+
+    @Test
+    fun server_acceptance_keeps_the_bubble_until_the_provider_event() {
+        val queued = markPendingAccepted(listOf(local()), "local-1")
+
+        assertEquals(1, queued.size)
+        assertTrue(queued.single().serverAccepted)
+    }
+
+    @Test
+    fun identical_messages_are_reconciled_one_at_a_time() {
+        val queued = listOf(local(), local().copy(id = "local-2"))
+        val afterFirst =
+            reconcileUserMessage(
+                queued,
+                SessionEvent.UserMessage("keep this", id = null, attachments = emptyList()),
+            )
+
+        assertEquals(listOf("local-2"), afterFirst.map { it.id })
+    }
+}