message: Test also nullable columns while we are at it.
diff: @@ -1852,14 +1852,16 @@ std::string create_random_a_string(size_t max_len) {
  }
  -TEST(StringIndex_Insensitive_Fuzz)
  +TEST_TYPES(StringIndex_Insensitive_Fuzz, non_nullable, nullable)
  {
  + constexpr bool nullable = TEST_TYPE::value;
  +
  const size_t max_str_len = 9;
  const size_t iters = 100;
  for (size_t iter = 0; iter < iters; iter++) {
  ref_type ref = StringColumn::create(Allocator::get_default());
  - StringColumn col(Allocator::get_default(), ref);
  + StringColumn col(Allocator::get_default(), ref, nullable);
  size_t rows = fastrand(2 * REALM_MAX_BPNODE_SIZE - 1);
  