155 lines
5.9 KiB
Go
155 lines
5.9 KiB
Go
// Copyright (c) 2016 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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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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func TestInt32(t *testing.T) {
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atom := NewInt32(42)
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require.Equal(t, int32(42), atom.Load(), "Load didn't work.")
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require.Equal(t, int32(46), atom.Add(4), "Add didn't work.")
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require.Equal(t, int32(44), atom.Sub(2), "Sub didn't work.")
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require.Equal(t, int32(45), atom.Inc(), "Inc didn't work.")
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require.Equal(t, int32(44), atom.Dec(), "Dec didn't work.")
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require.True(t, atom.CAS(44, 0), "CAS didn't report a swap.")
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require.Equal(t, int32(0), atom.Load(), "CAS didn't set the correct value.")
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require.Equal(t, int32(0), atom.Swap(1), "Swap didn't return the old value.")
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require.Equal(t, int32(1), atom.Load(), "Swap didn't set the correct value.")
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atom.Store(42)
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require.Equal(t, int32(42), atom.Load(), "Store didn't set the correct value.")
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}
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func TestInt64(t *testing.T) {
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atom := NewInt64(42)
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require.Equal(t, int64(42), atom.Load(), "Load didn't work.")
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require.Equal(t, int64(46), atom.Add(4), "Add didn't work.")
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require.Equal(t, int64(44), atom.Sub(2), "Sub didn't work.")
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require.Equal(t, int64(45), atom.Inc(), "Inc didn't work.")
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require.Equal(t, int64(44), atom.Dec(), "Dec didn't work.")
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require.True(t, atom.CAS(44, 0), "CAS didn't report a swap.")
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require.Equal(t, int64(0), atom.Load(), "CAS didn't set the correct value.")
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require.Equal(t, int64(0), atom.Swap(1), "Swap didn't return the old value.")
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require.Equal(t, int64(1), atom.Load(), "Swap didn't set the correct value.")
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atom.Store(42)
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require.Equal(t, int64(42), atom.Load(), "Store didn't set the correct value.")
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}
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func TestUint32(t *testing.T) {
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atom := NewUint32(42)
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require.Equal(t, uint32(42), atom.Load(), "Load didn't work.")
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require.Equal(t, uint32(46), atom.Add(4), "Add didn't work.")
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require.Equal(t, uint32(44), atom.Sub(2), "Sub didn't work.")
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require.Equal(t, uint32(45), atom.Inc(), "Inc didn't work.")
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require.Equal(t, uint32(44), atom.Dec(), "Dec didn't work.")
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require.True(t, atom.CAS(44, 0), "CAS didn't report a swap.")
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require.Equal(t, uint32(0), atom.Load(), "CAS didn't set the correct value.")
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require.Equal(t, uint32(0), atom.Swap(1), "Swap didn't return the old value.")
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require.Equal(t, uint32(1), atom.Load(), "Swap didn't set the correct value.")
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atom.Store(42)
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require.Equal(t, uint32(42), atom.Load(), "Store didn't set the correct value.")
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}
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func TestUint64(t *testing.T) {
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atom := NewUint64(42)
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require.Equal(t, uint64(42), atom.Load(), "Load didn't work.")
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require.Equal(t, uint64(46), atom.Add(4), "Add didn't work.")
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require.Equal(t, uint64(44), atom.Sub(2), "Sub didn't work.")
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require.Equal(t, uint64(45), atom.Inc(), "Inc didn't work.")
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require.Equal(t, uint64(44), atom.Dec(), "Dec didn't work.")
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require.True(t, atom.CAS(44, 0), "CAS didn't report a swap.")
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require.Equal(t, uint64(0), atom.Load(), "CAS didn't set the correct value.")
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require.Equal(t, uint64(0), atom.Swap(1), "Swap didn't return the old value.")
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require.Equal(t, uint64(1), atom.Load(), "Swap didn't set the correct value.")
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atom.Store(42)
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require.Equal(t, uint64(42), atom.Load(), "Store didn't set the correct value.")
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}
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func TestBool(t *testing.T) {
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atom := NewBool(false)
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require.False(t, atom.Toggle(), "Expected swap to return previous value.")
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require.True(t, atom.Load(), "Unexpected state after swap.")
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require.True(t, atom.CAS(true, true), "CAS should swap when old matches")
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require.True(t, atom.Load(), "CAS should have no effect")
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require.True(t, atom.CAS(true, false), "CAS should swap when old matches")
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require.False(t, atom.Load(), "CAS should have modified the value")
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require.False(t, atom.CAS(true, false), "CAS should fail on old mismatch")
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require.False(t, atom.Load(), "CAS should not have modified the value")
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atom.Store(false)
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require.False(t, atom.Load(), "Unexpected state after store.")
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prev := atom.Swap(false)
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require.False(t, prev, "Expected Swap to return previous value.")
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prev = atom.Swap(true)
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require.False(t, prev, "Expected Swap to return previous value.")
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}
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func TestFloat64(t *testing.T) {
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atom := NewFloat64(4.2)
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require.Equal(t, float64(4.2), atom.Load(), "Load didn't work.")
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require.True(t, atom.CAS(4.2, 0.5), "CAS didn't report a swap.")
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require.Equal(t, float64(0.5), atom.Load(), "CAS didn't set the correct value.")
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require.False(t, atom.CAS(0.0, 1.5), "CAS reported a swap.")
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atom.Store(42.0)
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require.Equal(t, float64(42.0), atom.Load(), "Store didn't set the correct value.")
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require.Equal(t, float64(42.5), atom.Add(0.5), "Add didn't work.")
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require.Equal(t, float64(42.0), atom.Sub(0.5), "Sub didn't work.")
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}
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func TestValue(t *testing.T) {
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var v Value
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assert.Nil(t, v.Load(), "initial Value is not nil")
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v.Store(42)
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assert.Equal(t, 42, v.Load())
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v.Store(84)
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assert.Equal(t, 84, v.Load())
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assert.Panics(t, func() { v.Store("foo") })
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}
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