Remove cudf::test::print calls from libcudf gtests (#12604)

Removes unneeded calls to `cudf::test::print` and `std::printf` in libcudf gtests source code.
Some of these were found in the build log while diagnosing a CI build failure.

Authors:
  - David Wendt (https://github.com/davidwendt)

Approvers:
  - Yunsong Wang (https://github.com/PointKernel)
  - Vyas Ramasubramani (https://github.com/vyasr)

URL: #12604

cpp/tests/copying/split_tests.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019-2022, NVIDIA CORPORATION.
+ * Copyright (c) 2019-2023, NVIDIA CORPORATION.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -1268,9 +1268,6 @@ thrust::make_counting_iterator(10000));
                     thrust::make_counting_iterator(expected.num_columns()),
                     [&expected, &result](cudf::size_type i){
 
-        // printf("col: ");
-        // cudf::test::print(result.table.column(i));
-        // printf("\n");
         CUDF_TEST_EXPECT_COLUMNS_EQUIVALENT(expected.column(i), result.table.column(i));
       });
     },

cpp/tests/join/join_tests.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019-2022, NVIDIA CORPORATION.
+ * Copyright (c) 2019-2023, NVIDIA CORPORATION.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -341,14 +341,6 @@ TEST_F(JoinTest, FullJoinOnNulls)
   auto result_sort_order = cudf::sorted_order(result->view());
   auto sorted_result     = cudf::gather(result->view(), *result_sort_order);
 
-#if 0
-  std::cout << "Actual Results:\n";
-  cudf::test::print(sorted_result->get_column(0).view(), std::cout, ",\t\t");
-  cudf::test::print(sorted_result->get_column(1).view(), std::cout, ",\t\t");
-  cudf::test::print(sorted_result->get_column(2).view(), std::cout, ",\t\t");
-  cudf::test::print(sorted_result->get_column(3).view(), std::cout, ",\t\t");
-#endif
-
   column_wrapper<int32_t> col_gold_0{{   3,   -1,   -1,    -1},
                                      {   1,    0,    0,     0}};
   strcol_wrapper          col_gold_1{{ "s0", "s1",  "",    ""},
@@ -373,14 +365,6 @@ TEST_F(JoinTest, FullJoinOnNulls)
   auto gold_sort_order = cudf::sorted_order(gold.view());
   auto sorted_gold     = cudf::gather(gold.view(), *gold_sort_order);
 
-#if 0
-  std::cout << "Expected Results:\n";
-  cudf::test::print(sorted_gold->get_column(0).view(), std::cout, ",\t\t");
-  cudf::test::print(sorted_gold->get_column(1).view(), std::cout, ",\t\t");
-  cudf::test::print(sorted_gold->get_column(2).view(), std::cout, ",\t\t");
-  cudf::test::print(sorted_gold->get_column(3).view(), std::cout, ",\t\t");
-#endif
-
   CUDF_TEST_EXPECT_TABLES_EQUIVALENT(*sorted_gold, *sorted_result);
 
   // Repeat test with compare_nulls_equal=false,
@@ -631,14 +615,6 @@ TEST_F(JoinTest, LeftJoinOnNulls)
   auto result_sort_order = cudf::sorted_order(result->view());
   auto sorted_result     = cudf::gather(result->view(), *result_sort_order);
 
-#if 0
-  std::cout << "Actual Results:\n";
-  cudf::test::print(sorted_result->get_column(0).view(), std::cout, ",\t\t");
-  cudf::test::print(sorted_result->get_column(1).view(), std::cout, ",\t\t");
-  cudf::test::print(sorted_result->get_column(2).view(), std::cout, ",\t\t");
-  cudf::test::print(sorted_result->get_column(3).view(), std::cout, ",\t\t");
-#endif
-
   column_wrapper<int32_t> col_gold_0{{   3,    -1,    2},
                                      {   1,     0,    1}};
   strcol_wrapper          col_gold_1({ "s0",  "s1", "s2"},
@@ -664,14 +640,6 @@ TEST_F(JoinTest, LeftJoinOnNulls)
   auto gold_sort_order = cudf::sorted_order(gold.view());
   auto sorted_gold     = cudf::gather(gold.view(), *gold_sort_order);
 
-#if 0
-  std::cout << "Expected Results:\n";
-  cudf::test::print(sorted_gold->get_column(0).view(), std::cout, ",\t\t");
-  cudf::test::print(sorted_gold->get_column(1).view(), std::cout, ",\t\t");
-  cudf::test::print(sorted_gold->get_column(2).view(), std::cout, ",\t\t");
-  cudf::test::print(sorted_gold->get_column(3).view(), std::cout, ",\t\t");
-#endif
-
   CUDF_TEST_EXPECT_TABLES_EQUIVALENT(*sorted_gold, *sorted_result);
 
   // Repeat test with compare_nulls_equal=false,

cpp/tests/sort/rank_test.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020-2022, NVIDIA CORPORATION.
+ * Copyright (c) 2020-2023, NVIDIA CORPORATION.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -37,18 +37,13 @@ void run_rank_test(cudf::table_view input,
                    cudf::order column_order,
                    cudf::null_policy null_handling,
                    cudf::null_order null_precedence,
-                   bool percentage,
-                   bool debug = false)
+                   bool percentage)
 {
   int i = 0;
   for (auto&& input_column : input) {
     // Rank
     auto got_rank_column =
       cudf::rank(input_column, method, column_order, null_handling, null_precedence, percentage);
-    if (debug) {
-      cudf::test::print(got_rank_column->view());
-      std::cout << "\n";
-    }
     CUDF_TEST_EXPECT_COLUMNS_EQUAL(expected.column(i), got_rank_column->view());
     i++;
   }
@@ -101,8 +96,7 @@ struct Rank : public cudf::test::BaseFixture {
                     std::get<0>(input_arg),
                     std::get<1>(input_arg),
                     std::get<2>(input_arg),
-                    percentage,
-                    false);
+                    percentage);
     }
   }
 };

cpp/tests/sort/sort_test.cpp

@@ -932,12 +932,10 @@ TYPED_TEST(Sort, MoreLists)
   {
     lcw col{lcw{lcw{}, lcw{-729297378, -627961465}},
             lcw{lcw{{0}, null_at(0)}, lcw{881899016, -1415270016}}};
-    cudf::test::print(col);
 
     {
       cudf::test::fixed_width_column_wrapper<int32_t> expected{{0, 1}};
       auto result = cudf::sorted_order(cudf::table_view({col}));
-      cudf::test::print(cudf::table_view({col}).column(0));
       CUDF_TEST_EXPECT_COLUMNS_EQUAL(expected, *result);
     }
   }