Add command line unittest-fee

- Remove the cmake UNIT_TEST_REFERENCE_FEE setting
  - Replaced by --unittest-fee runtime param

include/xrpl/beast/unit_test/runner.h

@@ -9,6 +9,7 @@
 #include <boost/assert.hpp>
 
 #include <mutex>
+#include <optional>
 #include <string>
 
 namespace beast {
@@ -22,6 +23,7 @@ namespace unit_test {
 class runner
 {
     std::string arg_;
+    std::optional<std::int64_t> referenceFee_;
     bool default_ = false;
     bool failed_ = false;
     bool cond_ = false;
@@ -54,6 +56,24 @@ public:
         return arg_;
     }
 
+    /** Set the reference fee (in drops) for tests.
+
+        If provided, this value is used in every suite that
+        does not override it.
+    */
+    void
+    referenceFee(std::int64_t fee)
+    {
+        referenceFee_ = fee;
+    }
+
+    /** Returns the reference fee, if any. */
+    std::optional<std::int64_t> const&
+    referenceFee() const
+    {
+        return referenceFee_;
+    }
+
     /** Run the specified suite.
         @return `true` if any conditions failed.
     */

include/xrpl/beast/unit_test/suite.h

@@ -281,6 +281,16 @@ public:
         return runner_->arg();
     }
 
+    /** Return the reference fee associated with the runner. */
+    std::optional<std::int64_t>
+    referenceFee() const
+    {
+        assert(runner_);
+        if (!runner_)
+            return {};
+        return runner_->referenceFee();
+    }
+
     // DEPRECATED
     // @return `true` if the test condition indicates success(a false value)
     template <class Condition, class String>

include/xrpl/ledger/helpers/NFTokenHelpers.h

@@ -20,6 +20,10 @@ removeTokenOffersWithLimit(
     Keylet const& directory,
     std::size_t maxDeletableOffers);
 
+/** Returns tesSUCCESS if NFToken has few enough offers that it can be burned */
+TER
+notTooManyOffers(ReadView const& view, uint256 const& nftokenID);
+
 /** Finds the specified token in the owner's token directory. */
 std::optional<STObject>
 findToken(ReadView const& view, AccountID const& owner, uint256 const& nftokenID);