Release failed member snapshot requests and validate deletion frames

tools/chatgui-android/app/src/test/java/com/utun/chat/data/MemberRepositoryTest.kt

@@ -88,4 +88,26 @@ class MemberRepositoryTest {
         repo.onEvent(23, event("123", row(1)))
         repo.refresh("123"); assertTrue(repo.member("123", 1)!!.phoneStatusKnown)
     }
+
+    @Test fun enqueueExceptionReleasesPendingAndKeepsLastSnapshot() {
+        var requests = 0
+        val diagnostics = mutableListOf<String>()
+        val repo = MemberRepository({ if (++requests == 1) error("JNI request failed") else true }, { true }, { 0 },
+            { _, message -> diagnostics.add(message) })
+        repo.onEvent(12, null); repo.onEvent(23, event("123", row(1)))
+        val before = repo.members.value
+        repo.refresh("123"); repo.refresh("123")
+        assertEquals(2, requests); assertEquals(before, repo.members.value)
+        assertTrue(diagnostics.any { "enqueue threw" in it })
+    }
+
+    @Test fun malformedDeletionCannotClearAnOtherwiseValidSnapshot() {
+        val repo = repository(); repo.onEvent(23, event("123", row(1)))
+        val before = repo.members.value
+        val header = byteArrayOf(3) + "123".toByteArray()
+        repo.onEvent(31, header + byteArrayOf(0))
+        assertEquals(before, repo.members.value)
+        repo.onEvent(31, header)
+        assertTrue(repo.members.value.isEmpty())
+    }
 }