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83 lines
2.6 KiB
83 lines
2.6 KiB
// Copyright (c) 2021 Uber Technologies, Inc. |
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// |
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// Permission is hereby granted, free of charge, to any person obtaining a copy |
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// of this software and associated documentation files (the "Software"), to deal |
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// in the Software without restriction, including without limitation the rights |
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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// copies of the Software, and to permit persons to whom the Software is |
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// furnished to do so, subject to the following conditions: |
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// |
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// The above copyright notice and this permission notice shall be included in |
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// all copies or substantial portions of the Software. |
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// |
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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// THE SOFTWARE. |
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package atomic |
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import ( |
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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 TestUnsafePointer(t *testing.T) { |
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i := int64(42) |
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j := int64(0) |
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k := int64(1) |
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tests := []struct { |
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desc string |
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newAtomic func() *UnsafePointer |
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initial unsafe.Pointer |
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}{ |
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{ |
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desc: "non-empty", |
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newAtomic: func() *UnsafePointer { |
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return NewUnsafePointer(unsafe.Pointer(&i)) |
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}, |
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initial: unsafe.Pointer(&i), |
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}, |
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{ |
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desc: "nil", |
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newAtomic: func() *UnsafePointer { |
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var p UnsafePointer |
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return &p |
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}, |
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initial: unsafe.Pointer(nil), |
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}, |
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} |
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for _, tt := range tests { |
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t.Run(tt.desc, func(t *testing.T) { |
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t.Run("Load", func(t *testing.T) { |
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atom := tt.newAtomic() |
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require.Equal(t, tt.initial, atom.Load(), "Load should report nil.") |
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}) |
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t.Run("Swap", func(t *testing.T) { |
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atom := tt.newAtomic() |
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require.Equal(t, tt.initial, atom.Swap(unsafe.Pointer(&k)), "Swap didn't return the old value.") |
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require.Equal(t, unsafe.Pointer(&k), atom.Load(), "Swap didn't set the correct value.") |
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}) |
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t.Run("CAS", func(t *testing.T) { |
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atom := tt.newAtomic() |
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require.True(t, atom.CAS(tt.initial, unsafe.Pointer(&j)), "CAS didn't report a swap.") |
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require.Equal(t, unsafe.Pointer(&j), atom.Load(), "CAS didn't set the correct value.") |
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}) |
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t.Run("Store", func(t *testing.T) { |
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atom := tt.newAtomic() |
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atom.Store(unsafe.Pointer(&i)) |
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require.Equal(t, unsafe.Pointer(&i), atom.Load(), "Store didn't set the correct value.") |
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}) |
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}) |
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} |
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}
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