From ce20f0b001966a72de07a65bc01a93f6a42d6311 Mon Sep 17 00:00:00 2001
From: "D.R.racer" <drracer@drracer.eu>
Date: Tue, 22 Jun 2021 21:47:39 +0200
Subject: [PATCH] Greatly improve unload filament unit test

+ relevant changes for other unit tests -> prepare for improving
of the other unit tests as well
---
 src/logic/tool_change.cpp                     |  57 ++++--
 src/logic/tool_change.h                       |   4 +
 src/logic/unload_filament.cpp                 |  10 +-
 src/logic/unload_filament.h                   |   3 +-
 src/modules/debouncer.cpp                     |   2 +-
 src/modules/finda.h                           |  11 +-
 .../logic/cut_filament/test_cut_filament.cpp  |  22 +-
 .../eject_filament/test_eject_filament.cpp    |  15 +-
 .../test_feed_to_bondtech.cpp                 | 137 ++++---------
 .../feed_to_finda/test_feed_to_finda.cpp      |  23 +--
 .../load_filament/test_load_filament.cpp      |   2 +-
 tests/unit/logic/stubs/main_loop_stub.cpp     |  10 +-
 tests/unit/logic/stubs/main_loop_stub.h       |  15 +-
 tests/unit/logic/stubs/stub_motion.cpp        |  16 +-
 tests/unit/logic/stubs/stub_motion.h          |   2 +
 .../logic/tool_change/test_tool_change.cpp    |  19 +-
 .../unload_filament/test_unload_filament.cpp  | 192 ++++++++++++++++--
 .../unload_to_finda/test_unload_to_finda.cpp  |  31 ++-
 tests/unit/modules/stubs/stub_adc.cpp         |   4 +
 tests/unit/modules/stubs/stub_adc.h           |   4 +
 20 files changed, 354 insertions(+), 225 deletions(-)

diff --git a/src/logic/tool_change.cpp b/src/logic/tool_change.cpp
index ad565ac..b06bf15 100644
--- a/src/logic/tool_change.cpp
+++ b/src/logic/tool_change.cpp
@@ -12,9 +12,6 @@ namespace logic {
 
 ToolChange toolChange;
 
-namespace mm = modules::motion;
-namespace mi = modules::idler;
-namespace ms = modules::selector;
 namespace mg = modules::globals;
 
 void ToolChange::Reset(uint8_t param) {
@@ -36,35 +33,51 @@ bool ToolChange::Step() {
     switch (state) {
     case ProgressCode::UnloadingFilament:
         if (unl.Step()) {
-            // unloading sequence finished
-            switch (unl.Error()) {
-            case ErrorCode::OK: // finished successfully
-                state = ProgressCode::LoadingFilament;
-                load.Reset(plannedSlot);
-                break;
-            case ErrorCode::UNLOAD_ERROR2: // @@TODO what shall we do in case of this error?
-            case ErrorCode::FINDA_DIDNT_TRIGGER:
-                break;
-            }
+            // unloading sequence finished - basically, no errors can occurr here
+            // as UnloadFilament should handle all the possible error states on its own
+            // There is no way the UnloadFilament to finish in an error state
+            state = ProgressCode::LoadingFilament;
+            load.Reset(plannedSlot);
         }
         break;
     case ProgressCode::LoadingFilament:
         if (load.Step()) {
-            // unloading sequence finished
-            switch (load.Error()) {
-            case ErrorCode::OK: // finished successfully
-                state = ProgressCode::OK;
-                break;
-                //            case ErrorCode::LOAD_ERROR2: // @@TODO load errors?
-                //            case ErrorCode::LOAD_FINDA_DIDNT_TRIGGER:
-                break;
-            }
+            // loading sequence finished - basically, no errors can occurr here
+            // as LoadFilament should handle all the possible error states on its own
+            // There is no way the LoadFilament to finish in an error state
+            state = ProgressCode::OK;
         }
         break;
     case ProgressCode::OK:
         return true;
+    default: // we got into an unhandled state, better report it
+        state = ProgressCode::ERRInternal;
+        error = ErrorCode::INTERNAL;
+        return true;
     }
     return false;
 }
 
+ProgressCode ToolChange::State() const {
+    switch (state) {
+    case ProgressCode::UnloadingFilament:
+        return unl.State(); // report sub-automaton states properly
+    case ProgressCode::LoadingFilament:
+        return load.State(); // report sub-automaton states properly
+    default:
+        return state;
+    }
+}
+
+ErrorCode ToolChange::Error() const {
+    switch (state) {
+    case ProgressCode::UnloadingFilament:
+        return unl.Error(); // report sub-automaton errors properly
+    case ProgressCode::LoadingFilament:
+        return load.Error(); // report sub-automaton errors properly
+    default:
+        return error;
+    }
+}
+
 } // namespace logic
diff --git a/src/logic/tool_change.h b/src/logic/tool_change.h
index 2453a73..d346d64 100644
--- a/src/logic/tool_change.h
+++ b/src/logic/tool_change.h
@@ -19,6 +19,10 @@ public:
     /// @returns true if the state machine finished its job, false otherwise
     bool Step() override;
 
+    ProgressCode State() const override;
+
+    ErrorCode Error() const override;
+
 private:
     UnloadFilament unl; ///< a high-level command/operation may be used as a building block of other operations as well
     LoadFilament load;
diff --git a/src/logic/unload_filament.cpp b/src/logic/unload_filament.cpp
index 16a4c22..1c31a12 100644
--- a/src/logic/unload_filament.cpp
+++ b/src/logic/unload_filament.cpp
@@ -17,12 +17,14 @@ namespace mi = modules::idler;
 namespace ml = modules::leds;
 namespace mg = modules::globals;
 
-void UnloadFilament::Reset(uint8_t param) {
+void UnloadFilament::Reset(uint8_t /*param*/) {
     // unloads filament from extruder - filament is above Bondtech gears
     mm::motion.InitAxis(mm::Pulley);
     state = ProgressCode::UnloadingToFinda;
     error = ErrorCode::OK;
     unl.Reset(maxRetries);
+    ml::leds.SetMode(mg::globals.ActiveSlot(), ml::green, ml::blink0);
+    ml::leds.SetMode(mg::globals.ActiveSlot(), ml::red, ml::off);
 }
 
 bool UnloadFilament::Step() {
@@ -33,7 +35,9 @@ bool UnloadFilament::Step() {
             if (unl.State() == UnloadToFinda::Failed) {
                 // couldn't unload to FINDA, report error and wait for user to resolve it
                 state = ProgressCode::ERR1DisengagingIdler;
+                error = ErrorCode::FINDA_DIDNT_TRIGGER;
                 ml::leds.SetMode(mg::globals.ActiveSlot(), ml::red, ml::blink0);
+                ml::leds.SetMode(mg::globals.ActiveSlot(), ml::green, ml::off);
             } else {
                 state = ProgressCode::DisengagingIdler;
             }
@@ -59,10 +63,11 @@ bool UnloadFilament::Step() {
         if (mm::motion.QueueEmpty()) {
             state = ProgressCode::OK;
             mm::motion.DisableAxis(mm::Pulley);
+            mg::globals.SetFilamentLoaded(false); // filament unloaded
+            ml::leds.SetMode(mg::globals.ActiveSlot(), ml::green, ml::on);
         }
         return false;
     case ProgressCode::ERR1DisengagingIdler: // couldn't unload to FINDA
-        error = ErrorCode::FINDA_DIDNT_TRIGGER;
         if (!mi::idler.Engaged()) {
             state = ProgressCode::ERR1WaitingForUser;
         }
@@ -88,7 +93,6 @@ bool UnloadFilament::Step() {
         return false;
     }
     case ProgressCode::OK:
-        mg::globals.SetFilamentLoaded(false); // filament unloaded
         return true; // successfully finished
     default: // we got into an unhandled state, better report it
         state = ProgressCode::ERRInternal;
diff --git a/src/logic/unload_filament.h b/src/logic/unload_filament.h
index 5be0964..7381059 100644
--- a/src/logic/unload_filament.h
+++ b/src/logic/unload_filament.h
@@ -13,7 +13,8 @@ public:
         : CommandBase() {}
 
     /// Restart the automaton
-    void Reset(uint8_t param) override;
+    /// @param param is not used, always unloads from the active slot
+    void Reset(uint8_t /*param*/) override;
 
     /// @returns true if the state machine finished its job, false otherwise
     bool Step() override;
diff --git a/src/modules/debouncer.cpp b/src/modules/debouncer.cpp
index eaffd0a..3c54d9b 100644
--- a/src/modules/debouncer.cpp
+++ b/src/modules/debouncer.cpp
@@ -15,7 +15,7 @@ void Debouncer::Step(uint16_t time, bool press) {
         break;
     case State::Detected:
         if (f.tmp == press) {
-            if (time - timeLastChange > debounceTimeout) {
+            if (time - timeLastChange >= debounceTimeout) {
                 f.state = State::WaitForRelease;
             }
         } else {
diff --git a/src/modules/finda.h b/src/modules/finda.h
index f2815b1..535da1f 100644
--- a/src/modules/finda.h
+++ b/src/modules/finda.h
@@ -7,16 +7,15 @@ namespace finda {
 
 class FINDA : protected debounce::Debouncer {
 public:
-    inline constexpr FINDA()
-        : debounce::Debouncer(debounce) {};
-    void Step();
-    using debounce::Debouncer::Pressed;
-
-private:
     /// time interval for debouncing @@TODO specify units
     constexpr static const uint16_t debounce = 100;
     /// ADC decision level when a FINDA is considered pressed/not pressed
     constexpr static const uint16_t adcDecisionLevel = 512;
+
+    inline constexpr FINDA()
+        : debounce::Debouncer(debounce) {};
+    void Step();
+    using debounce::Debouncer::Pressed;
 };
 
 extern FINDA finda;
diff --git a/tests/unit/logic/cut_filament/test_cut_filament.cpp b/tests/unit/logic/cut_filament/test_cut_filament.cpp
index 5bf70f9..ffe465a 100644
--- a/tests/unit/logic/cut_filament/test_cut_filament.cpp
+++ b/tests/unit/logic/cut_filament/test_cut_filament.cpp
@@ -34,7 +34,6 @@ TEST_CASE("cut_filament::cut0", "[cut_filament]") {
 
     CutFilament cf;
     // restart the automaton
-    currentCommand = &cf;
     cf.Reset(0);
 
     main_loop();
@@ -45,7 +44,7 @@ TEST_CASE("cut_filament::cut0", "[cut_filament]") {
     CHECK(modules::motion::axes[modules::motion::Selector].targetPos == ms::Selector::SlotPosition(0));
 
     // now cycle at most some number of cycles (to be determined yet) and then verify, that the idler and selector reached their target positions
-    REQUIRE(WhileCondition([&]() { return cf.TopLevelState() == ProgressCode::SelectingFilamentSlot; }, 5000));
+    REQUIRE(WhileTopState(cf, ProgressCode::SelectingFilamentSlot, 5000));
 
     CHECK(modules::motion::axes[modules::motion::Idler].pos == mi::Idler::SlotPosition(0));
     CHECK(modules::motion::axes[modules::motion::Selector].pos == ms::Selector::SlotPosition(0));
@@ -53,27 +52,32 @@ TEST_CASE("cut_filament::cut0", "[cut_filament]") {
     // idler and selector reached their target positions and the CF automaton will start feeding to FINDA as the next step
     REQUIRE(cf.TopLevelState() == ProgressCode::FeedingToFinda);
     // prepare for simulated finda trigger
-    hal::adc::ReinitADC(1, hal::adc::TADCData({ 0, 0, 0, 0, 600, 700, 800, 900 }), 10);
-    REQUIRE(WhileCondition([&]() { return cf.TopLevelState() == ProgressCode::FeedingToFinda; }, 5000));
+    REQUIRE(WhileCondition(
+        cf,
+        [&](int step) -> bool {
+        if( step == 1000 ){ // simulate FINDA trigger - will get pressed in 100 steps (due to debouncing)
+            hal::adc::SetADC(1, 900);
+        }
+        return cf.TopLevelState() == ProgressCode::FeedingToFinda; }, 5000));
 
     // filament fed into FINDA, cutting...
     REQUIRE(cf.TopLevelState() == ProgressCode::PreparingBlade);
-    REQUIRE(WhileCondition([&]() { return cf.TopLevelState() == ProgressCode::PreparingBlade; }, 5000));
+    REQUIRE(WhileTopState(cf, ProgressCode::PreparingBlade, 5000));
 
     REQUIRE(cf.TopLevelState() == ProgressCode::EngagingIdler);
-    REQUIRE(WhileCondition([&]() { return cf.TopLevelState() == ProgressCode::EngagingIdler; }, 5000));
+    REQUIRE(WhileTopState(cf, ProgressCode::EngagingIdler, 5000));
 
     // the idler should be at the active slot @@TODO
     REQUIRE(cf.TopLevelState() == ProgressCode::PushingFilament);
-    REQUIRE(WhileCondition([&]() { return cf.TopLevelState() == ProgressCode::PushingFilament; }, 5000));
+    REQUIRE(WhileTopState(cf, ProgressCode::PushingFilament, 5000));
 
     // filament pushed - performing cut
     REQUIRE(cf.TopLevelState() == ProgressCode::PerformingCut);
-    REQUIRE(WhileCondition([&]() { return cf.TopLevelState() == ProgressCode::PerformingCut; }, 5000));
+    REQUIRE(WhileTopState(cf, ProgressCode::PerformingCut, 5000));
 
     // returning selector
     REQUIRE(cf.TopLevelState() == ProgressCode::ReturningSelector);
-    REQUIRE(WhileCondition([&]() { return cf.TopLevelState() == ProgressCode::ReturningSelector; }, 5000));
+    REQUIRE(WhileTopState(cf, ProgressCode::ReturningSelector, 5000));
 
     // the next states are still @@TODO
 }
diff --git a/tests/unit/logic/eject_filament/test_eject_filament.cpp b/tests/unit/logic/eject_filament/test_eject_filament.cpp
index e1d9f1d..8810923 100644
--- a/tests/unit/logic/eject_filament/test_eject_filament.cpp
+++ b/tests/unit/logic/eject_filament/test_eject_filament.cpp
@@ -34,7 +34,6 @@ TEST_CASE("eject_filament::eject0", "[eject_filament]") {
 
     EjectFilament ef;
     // restart the automaton
-    currentCommand = &ef;
     ef.Reset(0);
 
     main_loop();
@@ -45,32 +44,32 @@ TEST_CASE("eject_filament::eject0", "[eject_filament]") {
     CHECK(modules::motion::axes[modules::motion::Selector].targetPos == ms::Selector::SlotPosition(4));
 
     // now cycle at most some number of cycles (to be determined yet) and then verify, that the idler and selector reached their target positions
-    REQUIRE(WhileCondition([&]() { return ef.TopLevelState() == ProgressCode::SelectingFilamentSlot; }, 5000));
+    REQUIRE(WhileTopState(ef, ProgressCode::SelectingFilamentSlot, 5000));
 
     // idler and selector reached their target positions and the CF automaton will start feeding to FINDA as the next step
     REQUIRE(ef.TopLevelState() == ProgressCode::FeedingToFinda);
     // prepare for simulated finda trigger
     hal::adc::ReinitADC(1, hal::adc::TADCData({ 0, 0, 0, 0, 600, 700, 800, 900 }), 10);
-    REQUIRE(WhileCondition([&]() { return ef.TopLevelState() == ProgressCode::FeedingToFinda; }, 50000));
+    REQUIRE(WhileTopState(ef, ProgressCode::FeedingToFinda, 50000));
 
     // filament fed into FINDA, cutting...
     REQUIRE(ef.TopLevelState() == ProgressCode::PreparingBlade);
-    REQUIRE(WhileCondition([&]() { return ef.TopLevelState() == ProgressCode::PreparingBlade; }, 5000));
+    REQUIRE(WhileTopState(ef, ProgressCode::PreparingBlade, 5000));
 
     REQUIRE(ef.TopLevelState() == ProgressCode::EngagingIdler);
-    REQUIRE(WhileCondition([&]() { return ef.TopLevelState() == ProgressCode::EngagingIdler; }, 5000));
+    REQUIRE(WhileTopState(ef, ProgressCode::EngagingIdler, 5000));
 
     // the idler should be at the active slot @@TODO
     REQUIRE(ef.TopLevelState() == ProgressCode::PushingFilament);
-    REQUIRE(WhileCondition([&]() { return ef.TopLevelState() == ProgressCode::PushingFilament; }, 5000));
+    REQUIRE(WhileTopState(ef, ProgressCode::PushingFilament, 5000));
 
     // filament pushed - performing cut
     REQUIRE(ef.TopLevelState() == ProgressCode::PerformingCut);
-    REQUIRE(WhileCondition([&]() { return ef.TopLevelState() == ProgressCode::PerformingCut; }, 5000));
+    REQUIRE(WhileTopState(ef, ProgressCode::PerformingCut, 5000));
 
     // returning selector
     REQUIRE(ef.TopLevelState() == ProgressCode::ReturningSelector);
-    REQUIRE(WhileCondition([&]() { return ef.TopLevelState() == ProgressCode::ReturningSelector; }, 5000));
+    REQUIRE(WhileTopState(ef, ProgressCode::ReturningSelector, 5000));
 
     // the next states are still @@TODO
 }
diff --git a/tests/unit/logic/feed_to_bondtech/test_feed_to_bondtech.cpp b/tests/unit/logic/feed_to_bondtech/test_feed_to_bondtech.cpp
index edd02eb..0f77ff0 100644
--- a/tests/unit/logic/feed_to_bondtech/test_feed_to_bondtech.cpp
+++ b/tests/unit/logic/feed_to_bondtech/test_feed_to_bondtech.cpp
@@ -29,15 +29,6 @@ namespace ms = modules::selector;
 
 namespace ha = hal::adc;
 
-template <typename COND>
-bool WhileCondition(logic::FeedToBondtech &ff, COND cond, uint32_t maxLoops = 5000) {
-    while (cond() && --maxLoops) {
-        main_loop();
-        ff.Step();
-    }
-    return maxLoops > 0;
-}
-
 TEST_CASE("feed_to_finda::feed_phase_unlimited", "[feed_to_finda]") {
     using namespace logic;
 
@@ -47,108 +38,50 @@ TEST_CASE("feed_to_finda::feed_phase_unlimited", "[feed_to_finda]") {
     main_loop();
 
     // restart the automaton
-    fb.Reset(false);
+    fb.Reset(1);
 
-    //    REQUIRE(ff.State() == FeedToBondtech::EngagingIdler);
+    REQUIRE(fb.State() == FeedToBondtech::EngagingIdler);
 
-    //    // it should have instructed the selector and idler to move to slot 1
-    //    // check if the idler and selector have the right command
-    //    CHECK(mm::axes[mm::Idler].targetPos == mi::Idler::SlotPosition(0));
-    //    CHECK(mm::axes[mm::Selector].targetPos == ms::Selector::SlotPosition(0));
-    //    CHECK(mm::axes[mm::Idler].enabled == true);
+    // it should have instructed the selector and idler to move to slot 0
+    // check if the idler and selector have the right command
+    CHECK(mm::axes[mm::Idler].targetPos == mi::Idler::SlotPosition(0));
+    CHECK(mm::axes[mm::Selector].targetPos == ms::Selector::SlotPosition(0));
+    CHECK(mm::axes[mm::Idler].enabled == true);
 
-    //    // engaging idler
-    //    REQUIRE(WhileCondition(
-    //        ff,
-    //        [&]() { return !mi::idler.Engaged(); },
-    //        5000));
+    // engaging idler
+    REQUIRE(WhileCondition(
+        fb,
+        [&](int) { return !mi::idler.Engaged(); },
+        5000));
 
-    //    CHECK(mm::axes[mm::Idler].pos == mi::Idler::SlotPosition(0));
-    //    CHECK(mm::axes[mm::Selector].pos == ms::Selector::SlotPosition(0));
+    CHECK(mm::axes[mm::Idler].pos == mi::Idler::SlotPosition(0));
+    CHECK(mm::axes[mm::Selector].pos == ms::Selector::SlotPosition(0));
 
-    //    // idler engaged, selector in position, we'll start pushing filament
-    //    REQUIRE(ff.State() == FeedToBondtech::PushingFilament);
-    //    // at least at the beginning the LED should shine green (it should be blinking, but this mode has been already verified in the LED's unit test)
-    //    REQUIRE(ml::leds.LedOn(mg::globals.ActiveSlot(), ml::Color::green));
+    // idler engaged, selector in position, we'll start pushing filament
+    REQUIRE(fb.State() == FeedToBondtech::PushingFilament);
+    // at least at the beginning the LED should shine green (it should be blinking, but this mode has been already verified in the LED's unit test)
+    REQUIRE(ml::leds.LedOn(mg::globals.ActiveSlot(), ml::Color::green));
 
-    //    // now let the filament be pushed into the FINDA - do 500 steps without triggering the condition
-    //    // and then let the simulated ADC channel 1 create a FINDA switch
-    //    ha::ReinitADC(1, ha::TADCData({ 600, 700, 800, 900 }), 1);
+    // @@TODO simulate incoming message from the printer - fsensor triggered
 
-    //    REQUIRE(WhileCondition(
-    //        ff,
-    //        [&]() { return ff.State() == FeedToBondtech::PushingFilament; },
-    //        1500));
-    //    // From now on the FINDA is reported as ON
+    REQUIRE(WhileCondition(
+        fb,
+        [&](int) { return fb.State() == FeedToBondtech::PushingFilament; },
+        1500));
 
-    //    // unloading back to PTFE
-    //    REQUIRE(ff.State() == FeedToBondtech::UnloadBackToPTFE);
-    //    REQUIRE(WhileCondition(
-    //        ff,
-    //        [&]() { return ff.State() == FeedToBondtech::UnloadBackToPTFE; },
-    //        5000));
+    // disengaging idler
+    REQUIRE(fb.State() == FeedToBondtech::DisengagingIdler);
+    REQUIRE(WhileCondition(
+        fb,
+        [&](int) { return fb.State() == FeedToBondtech::DisengagingIdler; },
+        5000));
 
-    //    // disengaging idler
-    //    REQUIRE(ff.State() == FeedToBondtech::DisengagingIdler);
-    //    REQUIRE(WhileCondition(
-    //        ff,
-    //        [&]() { return mi::idler.Engaged(); },
-    //        5000));
+    CHECK(mm::axes[mm::Idler].pos == mi::Idler::SlotPosition(5)); // @@TODO constants
+    CHECK(mm::axes[mm::Selector].pos == ms::Selector::SlotPosition(0));
 
-    //    CHECK(mm::axes[mm::Idler].pos == mi::Idler::SlotPosition(5)); // @@TODO constants
-    //    CHECK(mm::axes[mm::Selector].pos == ms::Selector::SlotPosition(0));
+    // state machine finished ok, the green LED should be on
+    REQUIRE(fb.State() == FeedToBondtech::OK);
+    REQUIRE(ml::leds.LedOn(mg::globals.ActiveSlot(), ml::Color::green));
 
-    //    // state machine finished ok, the green LED should be on
-    //    REQUIRE(ff.State() == FeedToBondtech::OK);
-    //    REQUIRE(ml::leds.LedOn(mg::globals.ActiveSlot(), ml::Color::green));
-
-    //    REQUIRE(ff.Step() == true); // the automaton finished its work, any consecutive calls to Step must return true
-    //}
-
-    //TEST_CASE("feed_to_finda::FINDA_failed", "[feed_to_finda]") {
-    //    using namespace logic;
-
-    //    ForceReinitAllAutomata();
-
-    //    FeedToBondtech ff;
-    //    main_loop();
-
-    //    // restart the automaton - we want the limited version of the feed
-    //    ff.Reset(true);
-
-    //    REQUIRE(ff.State() == FeedToBondtech::EngagingIdler);
-
-    //    // it should have instructed the selector and idler to move to slot 1
-    //    // check if the idler and selector have the right command
-    //    CHECK(mm::axes[mm::Idler].targetPos == mi::Idler::SlotPosition(0));
-    //    CHECK(mm::axes[mm::Selector].targetPos == ms::Selector::SlotPosition(0));
-
-    //    // engaging idler
-    //    REQUIRE(WhileCondition(
-    //        ff,
-    //        [&]() { return !mi::idler.Engaged(); },
-    //        5000));
-
-    //    CHECK(mm::axes[mm::Idler].pos == mi::Idler::SlotPosition(0));
-    //    CHECK(mm::axes[mm::Selector].pos == ms::Selector::SlotPosition(0));
-
-    //    // idler engaged, we'll start pushing filament
-    //    REQUIRE(ff.State() == FeedToBondtech::PushingFilament);
-    //    // at least at the beginning the LED should shine green (it should be blinking, but this mode has been already verified in the LED's unit test)
-    //    REQUIRE(ml::leds.Mode(mg::globals.ActiveSlot(), ml::Color::green) == ml::blink0);
-
-    //    // now let the filament be pushed into the FINDA - but we make sure the FINDA doesn't trigger at all
-    //    ha::ReinitADC(1, ha::TADCData({ 0 }), 100);
-
-    //    REQUIRE(WhileCondition(
-    //        ff, // boo, this formatting is UGLY!
-    //        [&]() { return ff.State() == FeedToBondtech::PushingFilament; },
-    //        5000));
-
-    //    // the FINDA didn't trigger, we should be in the Failed state
-    //    REQUIRE(ff.State() == FeedToBondtech::Failed);
-    //    REQUIRE(ml::leds.Mode(mg::globals.ActiveSlot(), ml::Color::green) == ml::off);
-    //    REQUIRE(ml::leds.Mode(mg::globals.ActiveSlot(), ml::Color::red) == ml::blink0);
-
-    //    REQUIRE(ff.Step() == true); // the automaton finished its work, any consecutive calls to Step must return true
+    REQUIRE(fb.Step() == true); // the automaton finished its work, any consecutive calls to Step must return true
 }
diff --git a/tests/unit/logic/feed_to_finda/test_feed_to_finda.cpp b/tests/unit/logic/feed_to_finda/test_feed_to_finda.cpp
index 7bbeacf..5e14c7d 100644
--- a/tests/unit/logic/feed_to_finda/test_feed_to_finda.cpp
+++ b/tests/unit/logic/feed_to_finda/test_feed_to_finda.cpp
@@ -29,15 +29,6 @@ namespace ms = modules::selector;
 
 namespace ha = hal::adc;
 
-template <typename COND>
-bool WhileCondition(logic::FeedToFinda &ff, COND cond, uint32_t maxLoops = 5000) {
-    while (cond() && --maxLoops) {
-        main_loop();
-        ff.Step();
-    }
-    return maxLoops > 0;
-}
-
 TEST_CASE("feed_to_finda::feed_phase_unlimited", "[feed_to_finda]") {
     using namespace logic;
 
@@ -60,7 +51,7 @@ TEST_CASE("feed_to_finda::feed_phase_unlimited", "[feed_to_finda]") {
     // engaging idler
     REQUIRE(WhileCondition(
         ff,
-        [&]() { return !mi::idler.Engaged(); },
+        [&](int) { return !mi::idler.Engaged(); },
         5000));
 
     CHECK(mm::axes[mm::Idler].pos == mi::Idler::SlotPosition(0));
@@ -77,7 +68,7 @@ TEST_CASE("feed_to_finda::feed_phase_unlimited", "[feed_to_finda]") {
 
     REQUIRE(WhileCondition(
         ff,
-        [&]() { return ff.State() == FeedToFinda::PushingFilament; },
+        [&](int) { return ff.State() == FeedToFinda::PushingFilament; },
         1500));
     // From now on the FINDA is reported as ON
 
@@ -85,14 +76,14 @@ TEST_CASE("feed_to_finda::feed_phase_unlimited", "[feed_to_finda]") {
     REQUIRE(ff.State() == FeedToFinda::UnloadBackToPTFE);
     REQUIRE(WhileCondition(
         ff,
-        [&]() { return ff.State() == FeedToFinda::UnloadBackToPTFE; },
+        [&](int) { return ff.State() == FeedToFinda::UnloadBackToPTFE; },
         5000));
 
     // disengaging idler
     REQUIRE(ff.State() == FeedToFinda::DisengagingIdler);
     REQUIRE(WhileCondition(
         ff,
-        [&]() { return mi::idler.Engaged(); },
+        [&](int) { return mi::idler.Engaged(); },
         5000));
 
     CHECK(mm::axes[mm::Idler].pos == mi::Idler::SlotPosition(5)); // @@TODO constants
@@ -126,7 +117,7 @@ TEST_CASE("feed_to_finda::FINDA_failed", "[feed_to_finda]") {
     // engaging idler
     REQUIRE(WhileCondition(
         ff,
-        [&]() { return !mi::idler.Engaged(); },
+        [&](int) { return !mi::idler.Engaged(); },
         5000));
 
     CHECK(mm::axes[mm::Idler].pos == mi::Idler::SlotPosition(0));
@@ -141,8 +132,8 @@ TEST_CASE("feed_to_finda::FINDA_failed", "[feed_to_finda]") {
     ha::ReinitADC(1, ha::TADCData({ 0 }), 100);
 
     REQUIRE(WhileCondition(
-        ff, // boo, this formatting is UGLY!
-        [&]() { return ff.State() == FeedToFinda::PushingFilament; },
+        ff,
+        [&](int) { return ff.State() == FeedToFinda::PushingFilament; },
         5000));
 
     // the FINDA didn't trigger, we should be in the Failed state
diff --git a/tests/unit/logic/load_filament/test_load_filament.cpp b/tests/unit/logic/load_filament/test_load_filament.cpp
index 4e65f52..304c127 100644
--- a/tests/unit/logic/load_filament/test_load_filament.cpp
+++ b/tests/unit/logic/load_filament/test_load_filament.cpp
@@ -34,7 +34,6 @@ TEST_CASE("unload_filament::unload0", "[unload_filament]") {
 
     LoadFilament lf;
     // restart the automaton
-    currentCommand = &lf;
     lf.Reset(0);
 
     main_loop();
@@ -53,4 +52,5 @@ TEST_CASE("unload_filament::unload0", "[unload_filament]") {
     //    REQUIRE(WhileCondition([&]() { return uf.TopLevelState() == ProgressCode::FinishingMoves; }, 5000));
 
     //    REQUIRE(uf.TopLevelState() == ProgressCode::OK);
+    REQUIRE(modules::globals::globals.FilamentLoaded() == true);
 }
diff --git a/tests/unit/logic/stubs/main_loop_stub.cpp b/tests/unit/logic/stubs/main_loop_stub.cpp
index e3eaed2..d115b47 100644
--- a/tests/unit/logic/stubs/main_loop_stub.cpp
+++ b/tests/unit/logic/stubs/main_loop_stub.cpp
@@ -13,9 +13,9 @@
 #include "../../../../src/modules/permanent_storage.h"
 #include "../../../../src/modules/selector.h"
 
-#include <new> // bring in placement new
+#include "../stubs/stub_motion.h"
 
-logic::CommandBase *currentCommand = nullptr;
+#include <new> // bring in placement new
 
 void main_loop() {
     modules::buttons::buttons.Step();
@@ -25,8 +25,6 @@ void main_loop() {
     modules::idler::idler.Step();
     modules::selector::selector.Step();
     modules::motion::motion.Step();
-    if (currentCommand)
-        currentCommand->Step();
 
     modules::time::IncMillis();
 }
@@ -57,8 +55,12 @@ void ForceReinitAllAutomata() {
     // finda OFF
     hal::adc::ReinitADC(1, hal::adc::TADCData({ 0 }), 1);
 
+    // reinit timing
     modules::time::ReinitTimebase();
 
+    // reinit axes positions
+    modules::motion::ReinitMotion();
+
     // let's assume we have the filament NOT loaded and active slot 0
     modules::globals::globals.SetFilamentLoaded(false);
     modules::globals::globals.SetActiveSlot(0);
diff --git a/tests/unit/logic/stubs/main_loop_stub.h b/tests/unit/logic/stubs/main_loop_stub.h
index 7078078..a22d664 100644
--- a/tests/unit/logic/stubs/main_loop_stub.h
+++ b/tests/unit/logic/stubs/main_loop_stub.h
@@ -4,12 +4,17 @@
 extern void main_loop();
 extern void ForceReinitAllAutomata();
 
-extern logic::CommandBase *currentCommand;
-
-template <typename COND>
-bool WhileCondition(COND cond, uint32_t maxLoops = 5000) {
-    while (cond() && --maxLoops) {
+template <typename SM, typename COND>
+bool WhileCondition(SM &sm, COND cond, uint32_t maxLoops = 5000) {
+    while (cond(maxLoops) && --maxLoops) {
         main_loop();
+        sm.Step();
     }
     return maxLoops > 0;
 }
+
+template <typename SM>
+bool WhileTopState(SM &sm, ProgressCode state, uint32_t maxLoops = 5000) {
+    return WhileCondition(
+        sm, [&](int) { return sm.TopLevelState() == state; }, maxLoops);
+}
diff --git a/tests/unit/logic/stubs/stub_motion.cpp b/tests/unit/logic/stubs/stub_motion.cpp
index 8df9a38..07e5d50 100644
--- a/tests/unit/logic/stubs/stub_motion.cpp
+++ b/tests/unit/logic/stubs/stub_motion.cpp
@@ -5,10 +5,13 @@ namespace modules {
 namespace motion {
 
 Motion motion;
+
+// Intentionally inited with strange values
+// Need to call ReinitMotion() each time we start some unit test
 AxisSim axes[3] = {
-    { 0, 0, false, false, false }, // pulley
-    { 1, 1, false, false, false }, // selector //@@TODO proper selector positions once defined
-    { 0, 0, false, false, false }, // idler
+    { -32767, -32767, false, false, false }, // pulley
+    { -32767, -32767, false, false, false }, // selector //@@TODO proper selector positions once defined
+    { -32767, -32767, false, false, false }, // idler
 };
 
 void Motion::InitAxis(Axis axis) {
@@ -72,6 +75,13 @@ void Motion::AbortPlannedMoves() {
     }
 }
 
+void ReinitMotion() {
+    // reset the simulation data to defaults
+    axes[0] = AxisSim({ 0, 0, false, false, false }); // pulley
+    axes[1] = AxisSim({ 1, 1, false, false, false }); // selector //@@TODO proper selector positions once defined
+    axes[2] = AxisSim({ 0, 0, false, false, false }); // idler
+}
+
 /// probably higher-level operations knowing the semantic meaning of axes
 
 } // namespace motion
diff --git a/tests/unit/logic/stubs/stub_motion.h b/tests/unit/logic/stubs/stub_motion.h
index 528b69c..bc1a814 100644
--- a/tests/unit/logic/stubs/stub_motion.h
+++ b/tests/unit/logic/stubs/stub_motion.h
@@ -14,5 +14,7 @@ struct AxisSim {
 
 extern AxisSim axes[3];
 
+extern void ReinitMotion();
+
 } // namespace motion
 } // namespace modules
diff --git a/tests/unit/logic/tool_change/test_tool_change.cpp b/tests/unit/logic/tool_change/test_tool_change.cpp
index cdc8e8d..e7c585a 100644
--- a/tests/unit/logic/tool_change/test_tool_change.cpp
+++ b/tests/unit/logic/tool_change/test_tool_change.cpp
@@ -34,23 +34,16 @@ TEST_CASE("tool_change::test0", "[tool_change]") {
 
     ToolChange tc;
     // restart the automaton
-    currentCommand = &tc;
     tc.Reset(0);
 
     main_loop();
 
-    //    REQUIRE(WhileCondition([&]() { return uf.TopLevelState() == ProgressCode::UnloadingToFinda; }, 5000));
+    REQUIRE(WhileTopState(tc, ProgressCode::UnloadingFilament, 5000));
+    REQUIRE(modules::globals::globals.FilamentLoaded() == false);
 
-    //    REQUIRE(uf.TopLevelState() == ProgressCode::DisengagingIdler);
-    //    REQUIRE(WhileCondition([&]() { return uf.TopLevelState() == ProgressCode::DisengagingIdler; }, 5000));
+    REQUIRE(tc.TopLevelState() == ProgressCode::LoadingFilament);
+    REQUIRE(WhileTopState(tc, ProgressCode::LoadingFilament, 5000));
 
-    //    CHECK(mm::axes[mm::Idler].pos == mi::Idler::SlotPosition(5));
-
-    //    REQUIRE(uf.TopLevelState() == ProgressCode::AvoidingGrind);
-    //    REQUIRE(WhileCondition([&]() { return uf.TopLevelState() == ProgressCode::AvoidingGrind; }, 5000));
-
-    //    REQUIRE(uf.TopLevelState() == ProgressCode::FinishingMoves);
-    //    REQUIRE(WhileCondition([&]() { return uf.TopLevelState() == ProgressCode::FinishingMoves; }, 5000));
-
-    //    REQUIRE(uf.TopLevelState() == ProgressCode::OK);
+    REQUIRE(tc.TopLevelState() == ProgressCode::OK);
+    REQUIRE(modules::globals::globals.FilamentLoaded() == true);
 }
diff --git a/tests/unit/logic/unload_filament/test_unload_filament.cpp b/tests/unit/logic/unload_filament/test_unload_filament.cpp
index b581b8c..ecd7a78 100644
--- a/tests/unit/logic/unload_filament/test_unload_filament.cpp
+++ b/tests/unit/logic/unload_filament/test_unload_filament.cpp
@@ -27,30 +27,198 @@ namespace mb = modules::buttons;
 namespace mg = modules::globals;
 namespace ms = modules::selector;
 
-TEST_CASE("unload_filament::unload0", "[unload_filament]") {
-    using namespace logic;
-
+void RegularUnloadFromSlot04(uint8_t slot) {
+    // prepare startup conditions
     ForceReinitAllAutomata();
 
-    UnloadFilament uf;
+    // change the startup to what we need here
+    // move selector to the right spot
+    ms::selector.MoveToSlot(slot);
+    while (ms::selector.Slot() != slot)
+        main_loop();
+
+    mg::globals.SetActiveSlot(slot);
+    mg::globals.SetFilamentLoaded(true);
+
+    // set FINDA ON + debounce
+    hal::adc::SetADC(1, mf::FINDA::adcDecisionLevel + 1);
+    for (size_t i = 0; i < mf::FINDA::debounce + 1; ++i)
+        main_loop();
+
+    // verify startup conditions
+    REQUIRE(mg::globals.FilamentLoaded() == true);
+    REQUIRE(mm::axes[mm::Idler].pos == mi::Idler::SlotPosition(5));
+    REQUIRE(!mi::idler.Engaged());
+    REQUIRE(mm::axes[mm::Selector].pos == ms::Selector::SlotPosition(slot));
+    REQUIRE(ms::selector.Slot() == slot);
+    REQUIRE(mf::finda.Pressed() == true);
+
     // restart the automaton
-    currentCommand = &uf;
-    uf.Reset(0);
+    logic::UnloadFilament uf;
+    uf.Reset(slot);
 
-    main_loop();
+    // Stage 0 - verify state just after Reset()
+    REQUIRE(mg::globals.FilamentLoaded() == true); // we still think we have filament loaded at this stage
+    REQUIRE(mm::axes[mm::Idler].pos == mi::Idler::SlotPosition(5)); // idler should have been activated by the underlying automaton
+    REQUIRE(!mi::idler.Engaged());
+    REQUIRE(mm::axes[mm::Selector].pos == ms::Selector::SlotPosition(slot)); // no change in selector's position
+    REQUIRE(ms::selector.Slot() == slot);
+    REQUIRE(mf::finda.Pressed() == true); // FINDA triggered off
+    REQUIRE(ml::leds.Mode(slot, ml::green) == ml::blink0); // green LED should blink
+    REQUIRE(uf.Error() == ErrorCode::OK); // no error so far
 
-    REQUIRE(WhileCondition([&]() { return uf.TopLevelState() == ProgressCode::UnloadingToFinda; }, 5000));
+    // run the automaton
+    // Stage 1 - unloading to FINDA
+    REQUIRE(WhileCondition(
+        uf,
+        [&](int step) -> bool {
+        if(step == 100){ // on 100th step make FINDA trigger
+            hal::adc::SetADC(1, 0);
+        }
+        return uf.TopLevelState() == ProgressCode::UnloadingToFinda; },
+        5000));
 
+    REQUIRE(mg::globals.FilamentLoaded() == true); // we still think we have filament loaded at this stage
+    REQUIRE(mm::axes[mm::Idler].pos == mi::Idler::SlotPosition(slot)); // idler should have been activated by the underlying automaton
+    REQUIRE(mi::idler.Engaged());
+    REQUIRE(mm::axes[mm::Selector].pos == ms::Selector::SlotPosition(slot)); // no change in selector's position
+    REQUIRE(ms::selector.Slot() == slot);
+    REQUIRE(mf::finda.Pressed() == false); // FINDA triggered off
+    REQUIRE(ml::leds.Mode(slot, ml::green) == ml::blink0); // green LED should blink
+    REQUIRE(uf.Error() == ErrorCode::OK); // no error so far
+
+    // Stage 2 - idler was engaged, disengage it
     REQUIRE(uf.TopLevelState() == ProgressCode::DisengagingIdler);
-    REQUIRE(WhileCondition([&]() { return uf.TopLevelState() == ProgressCode::DisengagingIdler; }, 5000));
+    REQUIRE(WhileTopState(uf, ProgressCode::DisengagingIdler, 5000));
 
-    CHECK(mm::axes[mm::Idler].pos == mi::Idler::SlotPosition(5));
+    REQUIRE(mg::globals.FilamentLoaded() == true); // we still think we have filament loaded at this stage
+    REQUIRE(mm::axes[mm::Idler].pos == mi::Idler::SlotPosition(5)); // idler should have been disengaged
+    REQUIRE(!mi::idler.Engaged());
+    REQUIRE(mm::axes[mm::Selector].pos == ms::Selector::SlotPosition(slot)); // no change in selector's position
+    REQUIRE(ms::selector.Slot() == slot);
+    REQUIRE(mf::finda.Pressed() == false); // FINDA still triggered off
+    REQUIRE(ml::leds.Mode(slot, ml::green) == ml::blink0); // green LED should blink
+    REQUIRE(uf.Error() == ErrorCode::OK); // no error so far
 
+    // Stage 3 - avoiding grind (whatever is that @@TODO)
     REQUIRE(uf.TopLevelState() == ProgressCode::AvoidingGrind);
-    REQUIRE(WhileCondition([&]() { return uf.TopLevelState() == ProgressCode::AvoidingGrind; }, 5000));
+    REQUIRE(WhileTopState(uf, ProgressCode::AvoidingGrind, 5000));
 
+    REQUIRE(mg::globals.FilamentLoaded() == true); // we still think we have filament loaded at this stage
+    REQUIRE(mm::axes[mm::Idler].pos == mi::Idler::SlotPosition(5)); // idler should have been disengaged
+    REQUIRE(!mi::idler.Engaged());
+    REQUIRE(mm::axes[mm::Selector].pos == ms::Selector::SlotPosition(slot)); // no change in selector's position
+    REQUIRE(ms::selector.Slot() == slot);
+    REQUIRE(mf::finda.Pressed() == false); // FINDA still triggered off
+    REQUIRE(ml::leds.Mode(slot, ml::green) == ml::blink0); // green LED should blink
+    REQUIRE(uf.Error() == ErrorCode::OK); // no error so far
+
+    // Stage 4 - finishing moves and setting global state correctly
     REQUIRE(uf.TopLevelState() == ProgressCode::FinishingMoves);
-    REQUIRE(WhileCondition([&]() { return uf.TopLevelState() == ProgressCode::FinishingMoves; }, 5000));
+    REQUIRE(WhileTopState(uf, ProgressCode::FinishingMoves, 5000));
 
+    REQUIRE(mg::globals.FilamentLoaded() == false); // filament unloaded
+    REQUIRE(mm::axes[mm::Idler].pos == mi::Idler::SlotPosition(5)); // idler should have been disengaged
+    REQUIRE(!mi::idler.Engaged());
+    REQUIRE(mm::axes[mm::Selector].pos == ms::Selector::SlotPosition(slot)); // no change in selector's position
+    REQUIRE(ms::selector.Slot() == slot);
+    REQUIRE(mf::finda.Pressed() == false); // FINDA still triggered off
+    REQUIRE(ml::leds.Mode(slot, ml::green) == ml::on); // green LED should be ON
+    REQUIRE(uf.Error() == ErrorCode::OK); // no error so far
+
+    // Stage 5 - repeated calls to TopLevelState should return "OK"
     REQUIRE(uf.TopLevelState() == ProgressCode::OK);
+    REQUIRE(mg::globals.FilamentLoaded() == false);
+    REQUIRE(mf::finda.Pressed() == false);
+    REQUIRE(uf.Error() == ErrorCode::OK); // no error
+}
+
+TEST_CASE("unload_filament::regular_unload_from_slot_0-4", "[unload_filament]") {
+    for (uint8_t slot = 0; slot < 5; ++slot) {
+        RegularUnloadFromSlot04(slot);
+    }
+}
+
+void FindaDidntTrigger(uint8_t slot) {
+    // prepare startup conditions
+    ForceReinitAllAutomata();
+
+    // change the startup to what we need here
+
+    // move selector to the right spot
+    ms::selector.MoveToSlot(slot);
+    while (ms::selector.Slot() != slot)
+        main_loop();
+
+    // set FINDA ON + debounce
+    hal::adc::SetADC(1, mf::FINDA::adcDecisionLevel + 1);
+    for (size_t i = 0; i < mf::FINDA::debounce + 1; ++i)
+        main_loop();
+
+    mg::globals.SetActiveSlot(slot);
+    mg::globals.SetFilamentLoaded(true);
+
+    // verify startup conditions
+    REQUIRE(mg::globals.FilamentLoaded() == true);
+    REQUIRE(mm::axes[mm::Idler].pos == mi::Idler::SlotPosition(5));
+    REQUIRE(!mi::idler.Engaged());
+    REQUIRE(mm::axes[mm::Selector].pos == ms::Selector::SlotPosition(slot));
+    REQUIRE(ms::selector.Slot() == slot);
+    REQUIRE(mf::finda.Pressed() == true);
+
+    // restart the automaton
+    logic::UnloadFilament uf;
+    uf.Reset(slot);
+
+    // Stage 0 - verify state just after Reset()
+    REQUIRE(mg::globals.FilamentLoaded() == true); // we still think we have filament loaded at this stage
+    REQUIRE(mm::axes[mm::Idler].pos == mi::Idler::SlotPosition(5)); // idler should have been activated by the underlying automaton
+    REQUIRE(!mi::idler.Engaged());
+    REQUIRE(mm::axes[mm::Selector].pos == ms::Selector::SlotPosition(slot)); // no change in selector's position
+    REQUIRE(ms::selector.Slot() == slot);
+    REQUIRE(mf::finda.Pressed() == true); // FINDA triggered off
+    REQUIRE(ml::leds.Mode(slot, ml::green) == ml::blink0); // green LED should blink
+    REQUIRE(uf.Error() == ErrorCode::OK); // no error so far
+
+    // run the automaton
+    // Stage 1 - unloading to FINDA - do NOT let it trigger - keep it pressed, the automaton should finish all moves with the pulley
+    // without reaching the FINDA and report an error
+    REQUIRE(WhileTopState(uf, ProgressCode::UnloadingToFinda, 50000));
+
+    REQUIRE(mg::globals.FilamentLoaded() == true); // we still think we have filament loaded at this stage
+    REQUIRE(mm::axes[mm::Idler].pos == mi::Idler::SlotPosition(slot)); // idler should have been activated by the underlying automaton
+    REQUIRE(mi::idler.Engaged());
+    REQUIRE(mm::axes[mm::Selector].pos == ms::Selector::SlotPosition(slot)); // no change in selector's position
+    REQUIRE(ms::selector.Slot() == slot);
+    REQUIRE(mf::finda.Pressed() == true); // FINDA still on
+    REQUIRE(ml::leds.Mode(slot, ml::red) == ml::blink0); // red LED should blink
+    REQUIRE(ml::leds.Mode(slot, ml::green) == ml::off); // green LED should be off
+    REQUIRE(uf.Error() == ErrorCode::FINDA_DIDNT_TRIGGER); // didn't get any response from FINDA
+    REQUIRE(uf.TopLevelState() == ProgressCode::ERR1DisengagingIdler);
+
+    // Stage 2 - idler should get disengaged
+    REQUIRE(WhileTopState(uf, ProgressCode::ERR1DisengagingIdler, 5000));
+
+    REQUIRE(mg::globals.FilamentLoaded() == true); // we still think we have filament loaded at this stage
+    REQUIRE(mm::axes[mm::Idler].pos == mi::Idler::SlotPosition(5)); // idler should have been disengaged
+    REQUIRE(!mi::idler.Engaged());
+    REQUIRE(mm::axes[mm::Selector].pos == ms::Selector::SlotPosition(slot)); // no change in selector's position
+    REQUIRE(ms::selector.Slot() == slot);
+    REQUIRE(mf::finda.Pressed() == true); // FINDA still on
+    REQUIRE(ml::leds.Mode(slot, ml::red) == ml::blink0); // red LED should blink
+    REQUIRE(ml::leds.Mode(slot, ml::green) == ml::off); // green LED should be off
+    REQUIRE(uf.Error() == ErrorCode::FINDA_DIDNT_TRIGGER);
+    REQUIRE(uf.TopLevelState() == ProgressCode::ERR1WaitingForUser);
+
+    // Stage 3 - the user has to do something
+    // there are 3 options:
+    // - help the filament a bit
+    // - try again the whole sequence
+    // - resolve the problem by hand - after pressing the button we shall check, that FINDA is off and we should do what?
+}
+
+TEST_CASE("unload_filament::finda_didnt_trigger", "[unload_filament]") {
+    for (uint8_t slot = 0; slot < 5; ++slot) {
+        FindaDidntTrigger(slot);
+    }
 }
diff --git a/tests/unit/logic/unload_to_finda/test_unload_to_finda.cpp b/tests/unit/logic/unload_to_finda/test_unload_to_finda.cpp
index 24f50ca..b5d8c9f 100644
--- a/tests/unit/logic/unload_to_finda/test_unload_to_finda.cpp
+++ b/tests/unit/logic/unload_to_finda/test_unload_to_finda.cpp
@@ -29,15 +29,6 @@ namespace ms = modules::selector;
 
 namespace ha = hal::adc;
 
-template <typename COND>
-bool WhileConditionFF(logic::UnloadToFinda &ff, COND cond, uint32_t maxLoops = 5000) {
-    while (cond() && --maxLoops) {
-        main_loop();
-        ff.Step();
-    }
-    return maxLoops > 0;
-}
-
 TEST_CASE("unload_to_finda::regular_unload", "[unload_to_finda]") {
     using namespace logic;
 
@@ -50,7 +41,8 @@ TEST_CASE("unload_to_finda::regular_unload", "[unload_to_finda]") {
 
     // wait for FINDA to debounce
     REQUIRE(WhileCondition(
-        [&]() { return !mf::finda.Pressed(); },
+        ff,
+        [&](int) { return !mf::finda.Pressed(); },
         5000));
 
     // restart the automaton - just 1 attempt
@@ -65,17 +57,17 @@ TEST_CASE("unload_to_finda::regular_unload", "[unload_to_finda]") {
     CHECK(mm::axes[mm::Idler].enabled == true);
 
     // engaging idler
-    REQUIRE(WhileConditionFF(
+    REQUIRE(WhileCondition(
         ff,
-        [&]() { return !mi::idler.Engaged(); },
+        [&](int) { return !mi::idler.Engaged(); },
         5000));
 
     // now pulling the filament until finda triggers
     REQUIRE(ff.State() == UnloadToFinda::WaitingForFINDA);
     hal::adc::ReinitADC(1, hal::adc::TADCData({ 1023, 900, 800, 500, 0 }), 10);
-    REQUIRE(WhileConditionFF(
+    REQUIRE(WhileCondition(
         ff,
-        [&]() { return mf::finda.Pressed(); },
+        [&](int) { return mf::finda.Pressed(); },
         50000));
 
     REQUIRE(ff.State() == UnloadToFinda::OK);
@@ -108,7 +100,8 @@ TEST_CASE("unload_to_finda::unload_without_FINDA_trigger", "[unload_to_finda]")
 
     // wait for FINDA to debounce
     REQUIRE(WhileCondition(
-        [&]() { return !mf::finda.Pressed(); },
+        ff,
+        [&](int) { return !mf::finda.Pressed(); },
         5000));
 
     // restart the automaton - just 1 attempt
@@ -123,18 +116,18 @@ TEST_CASE("unload_to_finda::unload_without_FINDA_trigger", "[unload_to_finda]")
     CHECK(mm::axes[mm::Idler].enabled == true);
 
     // engaging idler
-    REQUIRE(WhileConditionFF(
+    REQUIRE(WhileCondition(
         ff,
-        [&]() { return !mi::idler.Engaged(); },
+        [&](int) { return !mi::idler.Engaged(); },
         5000));
 
     // now pulling the filament until finda triggers
     REQUIRE(ff.State() == UnloadToFinda::WaitingForFINDA);
 
     // no changes to FINDA during unload - we'll pretend it never triggers
-    REQUIRE(!WhileConditionFF(
+    REQUIRE(!WhileCondition(
         ff,
-        [&]() { return mf::finda.Pressed(); },
+        [&](int) { return mf::finda.Pressed(); },
         50000));
 
     REQUIRE(ff.State() == UnloadToFinda::Failed);
diff --git a/tests/unit/modules/stubs/stub_adc.cpp b/tests/unit/modules/stubs/stub_adc.cpp
index 36921b4..e50aa7a 100644
--- a/tests/unit/modules/stubs/stub_adc.cpp
+++ b/tests/unit/modules/stubs/stub_adc.cpp
@@ -29,5 +29,9 @@ uint16_t ReadADC(uint8_t adc) {
     return rdptr[adc] != values2Return[adc].end() ? *rdptr[adc] : values2Return[adc].back();
 }
 
+void SetADC(uint8_t channel, uint16_t value) {
+    ReinitADC(channel, TADCData({ value }), 1);
+}
+
 } // namespace adc
 } // namespace hal
diff --git a/tests/unit/modules/stubs/stub_adc.h b/tests/unit/modules/stubs/stub_adc.h
index 2e2f360..16f6ee0 100644
--- a/tests/unit/modules/stubs/stub_adc.h
+++ b/tests/unit/modules/stubs/stub_adc.h
@@ -8,7 +8,11 @@ namespace adc {
 
 using TADCData = std::vector<uint16_t>;
 
+/// plan a vector of ADC values for the next steps
 void ReinitADC(uint8_t channel, TADCData &&d, uint8_t ovsmpl);
 
+/// set ADC value on a channel to some fixed value from now on
+void SetADC(uint8_t channel, uint16_t value);
+
 } // namespace adc
 } // namespace hal