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// 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.
package bmi_test
import (
"fmt"
"testing"
"github.com/apache/arrow-go/v18/parquet/internal/bmi"
"github.com/stretchr/testify/assert"
)
// Testing the issue in GH-37712
func TestBasicExtractBits(t *testing.T) {
tests := []struct {
bitmap, selection uint64
expected uint64
}{
{0, 0, 0},
{0xFF, 0, 0},
{0xFF, ^uint64(0), 0xFF},
{0xFF00FF, 0xAAAA, 0x000F},
{0xFF0AFF, 0xAFAA, 0x00AF},
{0xFFAAFF, 0xAFAA, 0x03AF},
{0xFECBDA9876543210, 0xF00FF00FF00FF00F, 0xFBD87430},
}
for _, tt := range tests {
t.Run(fmt.Sprintf("%d-%d=>%d", tt.bitmap, tt.selection, tt.expected), func(t *testing.T) {
assert.Equal(t, tt.expected, bmi.ExtractBits(tt.bitmap, tt.selection))
})
}
}
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