SERVER-24374 Make Decimal128 integer ctors constexpr

1 files changed, 12 insertions, 2 deletions

diff --git a/src/mongo/util/represent_as_test.cpp b/src/mongo/util/represent_as_test.cpp
index bab9ba3ca53..08532599694 100644
--- a/src/mongo/util/represent_as_test.cpp
+++ b/src/mongo/util/represent_as_test.cpp
@@ -30,6 +30,7 @@
 #include "mongo/platform/basic.h"
 
 #include <cmath>
+#include <fmt/format.h>
 #include <limits>
 #include <type_traits>
 
@@ -43,6 +44,8 @@ namespace mongo {
 
 namespace {
 
+using namespace fmt::literals;
+
 // Char values
 const signed char kCharMax = std::numeric_limits<signed char>::max();
 const int kCharMaxAsInt = kCharMax;
@@ -354,8 +357,15 @@ void integerToDecimal128() {
         v.emplace_back(-5);
     }
 
-    for (const auto& n : v) {
-        ASSERT(representAs<Decimal128>(n)->isEqual(Decimal128(std::to_string(n))));
+    for (const Integer n : v) {
+        auto d = representAs<Decimal128>(n);
+        ASSERT(d);
+        if (!d->isEqual(Decimal128(std::to_string(n)))) {
+            FAIL(
+                "Failed expectation, representAs<Decimal128>({}) == Decimal128({}),"
+                " but !Decimal128({}).isEqual(Decimal128(std::to_string({}))"_format(
+                    n, d->toString(), d->toString(), n));
+        }
     }
 }