From 2104282ddde8e7a86965a149f82cd3c3ac35c014 Mon Sep 17 00:00:00 2001
From: Chandra Pratap <chandrapratap3519@gmail.com>
Date: Sun, 7 Dec 2025 08:42:54 +0000
Subject: [PATCH] fuzz: Add tests for CCoinControl methods

The `ccoincontrol` fuzzer misses tests for a number of CCoinControl
operations. Add them.
---
 src/wallet/test/fuzz/coincontrol.cpp | 40 ++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/src/wallet/test/fuzz/coincontrol.cpp b/src/wallet/test/fuzz/coincontrol.cpp
index e46a469f9ea..870eab89490 100644
--- a/src/wallet/test/fuzz/coincontrol.cpp
+++ b/src/wallet/test/fuzz/coincontrol.cpp
@@ -99,6 +99,46 @@ FUZZ_TARGET(coincontrol, .init = initialize_coincontrol)
                 const bool is_selected = coin_control.IsSelected(out_point);
                 assert(!coin_control.GetInputWeight(out_point) || is_selected);
                 assert(!coin_control.GetSequence(out_point) || is_selected);
+            },
+            [&] {
+                const auto scripts = coin_control.GetScripts(out_point);
+                assert(coin_control.IsSelected(out_point) || (!scripts.first && !scripts.second));
+            },
+            [&] {
+                assert(coin_control.HasSelectedOrder() || !coin_control.GetSelectionPos(out_point));
+            },
+            [&] {
+                assert(!coin_control.GetSelectionPos(out_point) || coin_control.IsSelected(out_point));
+            },
+            [&] {
+                auto& input = coin_control.Select(out_point);
+                uint32_t sequence{fuzzed_data_provider.ConsumeIntegral<uint32_t>()};
+                input.SetSequence(sequence);
+                assert(input.GetSequence() == sequence);
+                assert(coin_control.GetSequence(out_point) == sequence);
+            },
+            [&] {
+                auto& input = coin_control.Select(out_point);
+                const CScript script{ConsumeScript(fuzzed_data_provider)};
+                input.SetScriptSig(script);
+                assert(input.HasScripts());
+                assert(input.GetScripts().first == script);
+                assert(coin_control.GetScripts(out_point).first == script);
+            },
+            [&] {
+                auto& input = coin_control.Select(out_point);
+                const CScriptWitness script_wit{ConsumeScriptWitness(fuzzed_data_provider)};
+                input.SetScriptWitness(script_wit);
+                assert(input.HasScripts());
+                assert(input.GetScripts().second->stack == script_wit.stack);
+                assert(coin_control.GetScripts(out_point).second->stack == script_wit.stack);
+            },
+            [&] {
+                auto& input = coin_control.Select(out_point);
+                unsigned int pos{fuzzed_data_provider.ConsumeIntegral<unsigned int>()};
+                input.SetPosition(pos);
+                assert(input.GetPosition() == pos);
+                assert(coin_control.GetSelectionPos(out_point) == pos);
             });
     }
 }