github.com/apache/arrow/go/v14@v14.0.1/parquet/internal/bmi/bmi_test.go (about)

     1  // Licensed to the Apache Software Foundation (ASF) under one
     2  // or more contributor license agreements.  See the NOTICE file
     3  // distributed with this work for additional information
     4  // regarding copyright ownership.  The ASF licenses this file
     5  // to you under the Apache License, Version 2.0 (the
     6  // "License"); you may not use this file except in compliance
     7  // with the License.  You may obtain a copy of the License at
     8  //
     9  // http://www.apache.org/licenses/LICENSE-2.0
    10  //
    11  // Unless required by applicable law or agreed to in writing, software
    12  // distributed under the License is distributed on an "AS IS" BASIS,
    13  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14  // See the License for the specific language governing permissions and
    15  // limitations under the License.
    16  
    17  package bmi_test
    18  
    19  import (
    20  	"fmt"
    21  	"testing"
    22  
    23  	"github.com/apache/arrow/go/v14/parquet/internal/bmi"
    24  	"github.com/stretchr/testify/assert"
    25  )
    26  
    27  // Testing the issue in GH-37712
    28  func TestBasicExtractBits(t *testing.T) {
    29  	tests := []struct {
    30  		bitmap, selection uint64
    31  		expected          uint64
    32  	}{
    33  		{0, 0, 0},
    34  		{0xFF, 0, 0},
    35  		{0xFF, ^uint64(0), 0xFF},
    36  		{0xFF00FF, 0xAAAA, 0x000F},
    37  		{0xFF0AFF, 0xAFAA, 0x00AF},
    38  		{0xFFAAFF, 0xAFAA, 0x03AF},
    39  		{0xFECBDA9876543210, 0xF00FF00FF00FF00F, 0xFBD87430},
    40  	}
    41  
    42  	for _, tt := range tests {
    43  		t.Run(fmt.Sprintf("%d-%d=>%d", tt.bitmap, tt.selection, tt.expected), func(t *testing.T) {
    44  			assert.Equal(t, tt.expected, bmi.ExtractBits(tt.bitmap, tt.selection))
    45  		})
    46  	}
    47  }