48 lines
1.3 KiB
Go
48 lines
1.3 KiB
Go
// Copyright 2024 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package join
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import (
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"sync/atomic"
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"testing"
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"unsafe"
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"github.com/stretchr/testify/require"
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)
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func TestHeapObjectCanMove(t *testing.T) {
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require.Equal(t, false, heapObjectsCanMove())
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}
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func TestFixedOffsetInRowLayout(t *testing.T) {
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require.Equal(t, 8, sizeOfNextPtr)
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require.Equal(t, 8, sizeOfLengthField)
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}
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func TestBitMaskInUint32(t *testing.T) {
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testData := make([]byte, 4)
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for i := 0; i < 32; i++ {
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testData[i/8] = 1 << (7 - i%8)
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testUint32 := atomic.LoadUint32((*uint32)(unsafe.Pointer(&testData[0])))
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ref := testUint32 & bitMaskInUint32[i]
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require.Equal(t, true, ref != 0)
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testData[i/8] = 0
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}
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}
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func TestUintptrCanHoldPointer(t *testing.T) {
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require.Equal(t, true, sizeOfUintptr >= sizeOfUnsafePointer)
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}
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