adds missing incldues

src/test/app/Invariants_test.cpp

@@ -20,6 +20,11 @@
 
 #include <boost/algorithm/string/predicate.hpp>
 
+#include "xrpld/app/tx/detail/InvariantCheck.h"
+
+#include <initializer_list>
+#include <string>
+
 namespace xrpl {
 namespace test {
 
@@ -3888,6 +3893,53 @@ class Invariants_test : public beast::unit_test::suite
             precloseMpt);
     }
 
+    void
+    testVaultComputeMinScale()
+    {
+        using namespace jtx;
+
+        Account const issuer{"issuer"};
+        PrettyAsset const vaultAsset = issuer["IOU"];
+
+        struct TestCase
+        {
+            std::string name;
+            std::int32_t expectedMinScale;
+            std::initializer_list<Number const> values;
+        };
+
+        auto const testCases = std::vector<TestCase>{
+            {
+                .name = "No values",
+                .expectedMinScale = 0,
+                .values = {},
+            },
+            {
+                .name = "Mixed integer and Number values",
+                .expectedMinScale = 0,
+                .values = {1, -1, Number{10, -1}},
+            },
+            {
+                .name = "Mixed scales",
+                .expectedMinScale = -2,
+                .values = {Number{1, -2}, Number{5, -3}, Number{3, -2}},
+            },
+        };
+
+        for (auto const& tc : testCases)
+        {
+            testcase("vault computeMinScale: " + tc.name);
+
+            auto const actualScale =
+                ValidVault::computeMinScale(vaultAsset, tc.values);
+
+            BEAST_EXPECTS(
+                actualScale == tc.expectedMinScale,
+                "expected: " + std::to_string(tc.expectedMinScale) +
+                    ", actual: " + std::to_string(actualScale));
+        }
+    }
+
 public:
     void
     run() override
@@ -3911,6 +3963,7 @@ public:
         testValidPseudoAccounts();
         testValidLoanBroker();
         testVault();
+        testVaultComputeMinScale();
     }
 };