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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 array_test
import (
"testing"
"github.com/apache/arrow-go/v18/arrow"
"github.com/apache/arrow-go/v18/arrow/array"
"github.com/apache/arrow-go/v18/arrow/memory"
"github.com/stretchr/testify/assert"
)
func TestNullArray(t *testing.T) {
pool := memory.NewCheckedAllocator(memory.NewGoAllocator())
defer pool.AssertSize(t, 0)
b := array.NewNullBuilder(pool)
defer b.Release()
b.AppendNull()
b.AppendNulls(2)
b.AppendEmptyValue()
b.AppendEmptyValues(2)
arr1 := b.NewArray().(*array.Null)
defer arr1.Release()
if got, want := arr1.Len(), 6; got != want {
t.Fatalf("invalid null array length: got=%d, want=%d", got, want)
}
if got, want := arr1.NullN(), 6; got != want {
t.Fatalf("invalid number of nulls: got=%d, want=%d", got, want)
}
if got, want := arr1.DataType(), arrow.Null; got != want {
t.Fatalf("invalid null data type: got=%v, want=%v", got, want)
}
arr1.Retain()
arr1.Release()
if arr1.Data() == nil {
t.Fatalf("invalid null data")
}
arr2 := b.NewNullArray()
defer arr2.Release()
if got, want := arr2.Len(), 0; got != want {
t.Fatalf("invalid null array length: got=%d, want=%d", got, want)
}
arr3 := array.NewNull(10)
defer arr3.Release()
if got, want := arr3.Len(), 10; got != want {
t.Fatalf("invalid null array length: got=%d, want=%d", got, want)
}
if got, want := arr3.NullN(), 10; got != want {
t.Fatalf("invalid number of nulls: got=%d, want=%d", got, want)
}
}
func TestNullStringRoundTrip(t *testing.T) {
// 1. create array
mem := memory.NewCheckedAllocator(memory.NewGoAllocator())
defer mem.AssertSize(t, 0)
b := array.NewNullBuilder(mem)
defer b.Release()
b.AppendNull()
b.AppendNulls(2)
b.AppendEmptyValue()
b.AppendEmptyValues(2)
arr := b.NewArray().(*array.Null)
defer arr.Release()
// 2. create array via AppendValueFromString
b1 := array.NewNullBuilder(mem)
defer b1.Release()
for i := 0; i < arr.Len(); i++ {
assert.NoError(t, b1.AppendValueFromString(arr.ValueStr(i)))
}
arr1 := b1.NewArray().(*array.Null)
defer arr1.Release()
assert.True(t, array.Equal(arr, arr1))
}
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