felipecrv commented on code in PR #41297: URL: https://github.com/apache/arrow/pull/41297#discussion_r1588096437
########## cpp/src/arrow/util/fixed_width_test.cc: ########## @@ -0,0 +1,181 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +// #include <cmath> +// #include <string> + +#include <gtest/gtest.h> + +#include "arrow/array/array_base.h" +#include "arrow/array/data.h" +#include "arrow/testing/gtest_util.h" +#include "arrow/type.h" +#include "arrow/util/fixed_width_internal.h" + +namespace arrow::util { + +namespace { +bool NotBool(const DataType& type) { return type.id() != Type::BOOL; } +bool NotInt32(const DataType& type) { return type.id() != Type::INT32; } +} // namespace + +class TestFixedWidth : public ::testing::Test { + protected: + std::shared_ptr<Array> bool_array_array_; + std::shared_ptr<Array> int_array_array_; + std::shared_ptr<Array> fsl_bool_array_; + std::shared_ptr<Array> fsl_int_array_; + std::shared_ptr<Array> fsl_int_nulls_array_; + std::shared_ptr<Array> fsl_int_inner_nulls_array_; + + std::shared_ptr<DataType> fsl(int32_t list_size, + const std::shared_ptr<DataType>& value_type) { + return fixed_size_list(value_type, list_size); + } + + public: + void SetUp() override { + bool_array_array_ = ArrayFromJSON(boolean(), "[true, false, null]"); + int_array_array_ = ArrayFromJSON(int32(), "[1, 0, null]"); + fsl_bool_array_ = ArrayFromJSON(fsl(2, boolean()), "[[true, false]]"); + fsl_int_array_ = ArrayFromJSON(fsl(2, int32()), "[[1, 0], [2, 3]]"); + fsl_int_nulls_array_ = ArrayFromJSON(fsl(2, int32()), "[[1, 0], null, [1, 2]]"); + fsl_int_inner_nulls_array_ = + ArrayFromJSON(fsl(2, int32()), "[[1, 0], [2, 3], [null, 2]]"); + } +}; + +TEST_F(TestFixedWidth, IsFixedWidth) { + auto arr = ArraySpan{*bool_array_array_->data()}; + // force_null_count doesn't matter because nulls at the top-level + // of the array are allowed by IsFixedWidthLike. + ASSERT_TRUE(IsFixedWidthLike(arr, /*force_null_count=*/false)); + ASSERT_TRUE(IsFixedWidthLike(arr, /*force_null_count=*/true)); + + ASSERT_TRUE(IsFixedWidthLike(arr, /*force_null_count=*/false, NotInt32)); + ASSERT_FALSE(IsFixedWidthLike(arr, /*force_null_count=*/false, NotBool)); + + arr = ArraySpan{*int_array_array_->data()}; + ASSERT_TRUE(IsFixedWidthLike(arr, /*force_null_count=*/false)); + ASSERT_TRUE(IsFixedWidthLike(arr, /*force_null_count=*/true)); + ASSERT_TRUE(IsFixedWidthLike(arr, /*force_null_count=*/false, NotBool)); +} + +TEST_F(TestFixedWidth, IsFixedWidthLike) { + auto arr = ArraySpan{*fsl_bool_array_->data()}; + // bools wrapped by fixed-size-list are not fixed-width because the + // innermost data buffer is a bitmap and won't byte-align. + ASSERT_FALSE(IsFixedWidthLike(arr, /*force_null_count=*/false)); + ASSERT_FALSE(IsFixedWidthLike(arr, /*force_null_count=*/true)); + + arr = ArraySpan{*fsl_int_array_->data()}; + ASSERT_TRUE(IsFixedWidthLike(arr, /*force_null_count=*/false)); + arr.null_count = kUnknownNullCount; + // force_null_count=true isn't necessary because nulls at the top-level + // of the array are allowed by IsFixedWidthLike. + ASSERT_TRUE(IsFixedWidthLike(arr, /*force_null_count=*/false)); + + arr.child_data[0].null_count = kUnknownNullCount; + // inner nulls are not allowed by IsFixedWidthLike... + ASSERT_FALSE(IsFixedWidthLike(arr, /*force_null_count=*/false)); + // ...but forcing null counting at on every internal array increases + // the chances of IsFixedWidthLike returning true. + ASSERT_TRUE(IsFixedWidthLike(arr, /*force_null_count=*/true)); + // Excluding INT32 from the internal array checks. + ASSERT_FALSE(IsFixedWidthLike(arr, /*force_null_count=*/true, NotInt32)); + + arr = ArraySpan{*fsl_int_nulls_array_->data()}; + // Nulls at the top-level of the array are allowed by IsFixedWidthLike. + // + // TODO(GH-10157): ArrayFromJSON uses FixedSizeListBuilder which currently + // produces nulls on the child data if one of the list-typed elements is null. + // ASSERT_TRUE(IsFixedWidthLike(arr, /*force_null_count=*/false)); + + arr = ArraySpan{*fsl_int_inner_nulls_array_->data()}; + // Inner nulls are not allowed by IsFixedWidthLike. + ASSERT_FALSE(IsFixedWidthLike(arr, /*force_null_count=*/true)); +} + +TEST_F(TestFixedWidth, MeasureWidthInBytes) { + auto b = boolean(); + auto i8 = int8(); + auto i32 = int32(); + auto varlen = utf8(); Review Comment: I will add. But note that the algorithm only branches on `BOOL`, `is_fixed_width(t)`, and `FIXED_SIZE_LIST`. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
