Support int128/uint128 in validated MockingBitGen

`absl::int128` and `absl::uint128` are not `std::is_integral`. There is an internal `IsIntegral` type trait we could use, but it actually makes more sense to remove the `static_assert` altogether. Any compile-time validation should be done in `absl::Uniform` itself, and duplicating that logic here just increases the chance of divergence.

PiperOrigin-RevId: 635971431
Change-Id: I9177ae64c86ee1abe6571e0b29aba1844553c972

1 files changed, 9 insertions, 0 deletions

diff --git a/absl/random/mock_distributions_test.cc b/absl/random/mock_distributions_test.cc
index 917799f0..80df8714 100644
--- a/absl/random/mock_distributions_test.cc
+++ b/absl/random/mock_distributions_test.cc
@@ -19,6 +19,7 @@
 
 #include "gmock/gmock.h"
 #include "gtest/gtest.h"
+#include "absl/numeric/int128.h"
 #include "absl/random/distributions.h"
 #include "absl/random/mocking_bit_gen.h"
 #include "absl/random/random.h"
@@ -81,6 +82,14 @@ TEST(MockUniform, OutOfBoundsIsAllowed) {
   EXPECT_EQ(absl::Uniform<int>(gen, 1, 100), 0);
 }
 
+TEST(ValidatedMockDistributions, UniformUInt128Works) {
+  absl::random_internal::MockingBitGenImpl<true> gen;
+
+  EXPECT_CALL(absl::MockUniform<absl::uint128>(), Call(gen))
+      .WillOnce(Return(absl::Uint128Max()));
+  EXPECT_EQ(absl::Uniform<absl::uint128>(gen), absl::Uint128Max());
+}
+
 TEST(ValidatedMockDistributions, UniformDoubleBoundaryCases) {
   absl::random_internal::MockingBitGenImpl<true> gen;