Delete bad test

cpp/tests/join/join_tests.cpp

@@ -1941,62 +1941,6 @@ TEST_F(JoinTest, FullJoinWithStructsAndNulls)
   CUDF_TEST_EXPECT_TABLES_EQUIVALENT(*sorted_gold, *sorted_result);
 }
 
-TEST_F(JoinTest, Repro_StructsWithoutNullsPushedDown)
-{
-  // When joining on a STRUCT column, if the parent nulls are not reflected in
-  // the children, the join might produce incorrect results.
-  //
-  // In this test, a fact table of structs is joined against a dimension table.
-  // Both tables must match (only) on the NULL row. This will fail if the fact table's
-  // nulls are not pushed down into its children.
-  using ints    = column_wrapper<int32_t>;
-  using structs = cudf::test::structs_column_wrapper;
-  using namespace cudf::test::iterators;
-
-  auto make_table = [](auto&& col) {
-    auto columns = CVector{};
-    columns.push_back(std::move(col));
-    return cudf::table{std::move(columns)};
-  };
-
-  auto const fact_table = [make_table] {
-    auto fact_ints    = ints{0, 1, 2, 3, 4};
-    auto fact_structs = structs{{fact_ints}, no_nulls()}.release();
-    // Now set struct validity to invalidate index#3.
-    cudf::detail::set_null_mask(
-      fact_structs->mutable_view().null_mask(), 3, 4, false, cudf::get_default_stream());
-    // Struct row#3 is null, but Struct.child has a non-null value.
-    return make_table(std::move(fact_structs));
-  }();
-
-  auto const dimension_table = [make_table] {
-    auto dim_ints    = ints{999};
-    auto dim_structs = structs{{dim_ints}, null_at(0)};
-    return make_table(dim_structs.release());
-  }();
-
-  auto const result = inner_join(fact_table.view(), dimension_table.view(), {0}, {0});
-  EXPECT_EQ(result->num_rows(), 1);  // The null STRUCT rows should match.
-
-  // Note: Join result might not have nulls pushed down, since it's an output of gather().
-  // Must superimpose parent nulls before comparisons.
-  auto [superimposed_results, _] = cudf::structs::detail::push_down_nulls(
-    *result, cudf::get_default_stream(), rmm::mr::get_current_device_resource());
-
-  auto const expected = [] {
-    auto fact_ints    = ints{0};
-    auto fact_structs = structs{{fact_ints}, null_at(0)};
-    auto dim_ints     = ints{0};
-    auto dim_structs  = structs{{dim_ints}, null_at(0)};
-    auto columns      = CVector{};
-    columns.push_back(fact_structs.release());
-    columns.push_back(dim_structs.release());
-    return cudf::table{std::move(columns)};
-  }();
-
-  CUDF_TEST_EXPECT_TABLES_EQUIVALENT(superimposed_results, expected);
-}
-
 using lcw = cudf::test::lists_column_wrapper<int32_t>;
 using cudf::test::iterators::null_at;