Ξ-W2-T1: the resample bake chain — instrument renders, extension banks, one click re-points and resets

tests/test_tracking_authority.cpp

@@ -449,7 +449,44 @@ static void testTiedUniverseIsStrictSubsetOfProtectedUniverse() {
     CHECK(tiedUsageExists(state, "bank/self.wav", "rsusage_ME") == Answer::No);
 }
 
+// The resample's own branch off the three answers. Indeterminate must land where Yes does:
+// AddDistinct disturbs no existing holder, so it is the non-destructive side.
+static void testResampleLandingTakesReplaceOnlyOnADefiniteNo() {
+    CHECK(resampleLanding(Answer::No) == Landing::Replace);
+    CHECK(resampleLanding(Answer::Yes) == Landing::AddDistinct);
+    CHECK(resampleLanding(Answer::Indeterminate) == Landing::AddDistinct);
+
+    // Composed with the query itself, over the three states a real bake meets.
+    OriginLedger ledger;
+    ledger.record(originOf("bank/src.wav", OriginKind::Capture, "S-src"));
+
+    // Sole holder, excluding itself -> nothing is tied -> replace.
+    const UsageFoldResult sole = foldLive(
+        {usage("rsusage_ME", "{T1}", {UsageHold{"S-src", "bank/src.wav"}})}, {"{T1}"});
+    const TrackingState soleState{LedgerStatus::Loaded, ledger, sole};
+    CHECK(resampleLanding(tiedUsageExists(soleState, "bank/src.wav", "rsusage_ME")) ==
+          Landing::Replace);
+
+    // A second live instance holds it -> add distinct, so that holder is undisturbed.
+    const UsageFoldResult shared = foldLive(
+        {usage("rsusage_ME", "{T1}", {UsageHold{"S-src", "bank/src.wav"}}),
+         usage("rsusage_OTHER", "{T2}", {UsageHold{"S-src", "bank/src.wav"}})},
+        {"{T1}", "{T2}"});
+    const TrackingState sharedState{LedgerStatus::Loaded, ledger, shared};
+    CHECK(resampleLanding(tiedUsageExists(sharedState, "bank/src.wav", "rsusage_ME")) ==
+          Landing::AddDistinct);
+
+    // A degraded ledger cannot answer -> add distinct rather than take over an entry
+    // whose holders are unknown.
+    const TrackingState degradedState{LedgerStatus::Unreadable, ledger, sole};
+    CHECK(tiedUsageExists(degradedState, "bank/src.wav", "rsusage_ME") ==
+          Answer::Indeterminate);
+    CHECK(resampleLanding(tiedUsageExists(degradedState, "bank/src.wav", "rsusage_ME")) ==
+          Landing::AddDistinct);
+}
+
 int main() {
+    testResampleLandingTakesReplaceOnlyOnADefiniteNo();
     testPruneProtectedSet();
     testLiveHoldProtectsDeReferencedCapture();
     testUnreadableUsageBlocksPruneAndNamesIt();