1// Copyright (c) 2016 Uber Technologies, Inc. 2// 3// Permission is hereby granted, free of charge, to any person obtaining a copy 4// of this software and associated documentation files (the "Software"), to deal 5// in the Software without restriction, including without limitation the rights 6// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 7// copies of the Software, and to permit persons to whom the Software is 8// furnished to do so, subject to the following conditions: 9// 10// The above copyright notice and this permission notice shall be included in 11// all copies or substantial portions of the Software. 12// 13// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 14// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 15// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 16// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 17// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 18// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 19// THE SOFTWARE. 20 21package atomic 22 23import ( 24 "testing" 25 "time" 26 27 "github.com/stretchr/testify/assert" 28 "github.com/stretchr/testify/require" 29) 30 31func TestInt32(t *testing.T) { 32 atom := NewInt32(42) 33 34 require.Equal(t, int32(42), atom.Load(), "Load didn't work.") 35 require.Equal(t, int32(46), atom.Add(4), "Add didn't work.") 36 require.Equal(t, int32(44), atom.Sub(2), "Sub didn't work.") 37 require.Equal(t, int32(45), atom.Inc(), "Inc didn't work.") 38 require.Equal(t, int32(44), atom.Dec(), "Dec didn't work.") 39 40 require.True(t, atom.CAS(44, 0), "CAS didn't report a swap.") 41 require.Equal(t, int32(0), atom.Load(), "CAS didn't set the correct value.") 42 43 require.Equal(t, int32(0), atom.Swap(1), "Swap didn't return the old value.") 44 require.Equal(t, int32(1), atom.Load(), "Swap didn't set the correct value.") 45 46 atom.Store(42) 47 require.Equal(t, int32(42), atom.Load(), "Store didn't set the correct value.") 48} 49 50func TestInt64(t *testing.T) { 51 atom := NewInt64(42) 52 53 require.Equal(t, int64(42), atom.Load(), "Load didn't work.") 54 require.Equal(t, int64(46), atom.Add(4), "Add didn't work.") 55 require.Equal(t, int64(44), atom.Sub(2), "Sub didn't work.") 56 require.Equal(t, int64(45), atom.Inc(), "Inc didn't work.") 57 require.Equal(t, int64(44), atom.Dec(), "Dec didn't work.") 58 59 require.True(t, atom.CAS(44, 0), "CAS didn't report a swap.") 60 require.Equal(t, int64(0), atom.Load(), "CAS didn't set the correct value.") 61 62 require.Equal(t, int64(0), atom.Swap(1), "Swap didn't return the old value.") 63 require.Equal(t, int64(1), atom.Load(), "Swap didn't set the correct value.") 64 65 atom.Store(42) 66 require.Equal(t, int64(42), atom.Load(), "Store didn't set the correct value.") 67} 68 69func TestUint32(t *testing.T) { 70 atom := NewUint32(42) 71 72 require.Equal(t, uint32(42), atom.Load(), "Load didn't work.") 73 require.Equal(t, uint32(46), atom.Add(4), "Add didn't work.") 74 require.Equal(t, uint32(44), atom.Sub(2), "Sub didn't work.") 75 require.Equal(t, uint32(45), atom.Inc(), "Inc didn't work.") 76 require.Equal(t, uint32(44), atom.Dec(), "Dec didn't work.") 77 78 require.True(t, atom.CAS(44, 0), "CAS didn't report a swap.") 79 require.Equal(t, uint32(0), atom.Load(), "CAS didn't set the correct value.") 80 81 require.Equal(t, uint32(0), atom.Swap(1), "Swap didn't return the old value.") 82 require.Equal(t, uint32(1), atom.Load(), "Swap didn't set the correct value.") 83 84 atom.Store(42) 85 require.Equal(t, uint32(42), atom.Load(), "Store didn't set the correct value.") 86} 87 88func TestUint64(t *testing.T) { 89 atom := NewUint64(42) 90 91 require.Equal(t, uint64(42), atom.Load(), "Load didn't work.") 92 require.Equal(t, uint64(46), atom.Add(4), "Add didn't work.") 93 require.Equal(t, uint64(44), atom.Sub(2), "Sub didn't work.") 94 require.Equal(t, uint64(45), atom.Inc(), "Inc didn't work.") 95 require.Equal(t, uint64(44), atom.Dec(), "Dec didn't work.") 96 97 require.True(t, atom.CAS(44, 0), "CAS didn't report a swap.") 98 require.Equal(t, uint64(0), atom.Load(), "CAS didn't set the correct value.") 99 100 require.Equal(t, uint64(0), atom.Swap(1), "Swap didn't return the old value.") 101 require.Equal(t, uint64(1), atom.Load(), "Swap didn't set the correct value.") 102 103 atom.Store(42) 104 require.Equal(t, uint64(42), atom.Load(), "Store didn't set the correct value.") 105} 106 107func TestBool(t *testing.T) { 108 atom := NewBool(false) 109 require.False(t, atom.Toggle(), "Expected swap to return previous value.") 110 require.True(t, atom.Load(), "Unexpected state after swap.") 111 112 require.True(t, atom.CAS(true, true), "CAS should swap when old matches") 113 require.True(t, atom.Load(), "CAS should have no effect") 114 require.True(t, atom.CAS(true, false), "CAS should swap when old matches") 115 require.False(t, atom.Load(), "CAS should have modified the value") 116 require.False(t, atom.CAS(true, false), "CAS should fail on old mismatch") 117 require.False(t, atom.Load(), "CAS should not have modified the value") 118 119 atom.Store(false) 120 require.False(t, atom.Load(), "Unexpected state after store.") 121 122 prev := atom.Swap(false) 123 require.False(t, prev, "Expected Swap to return previous value.") 124 125 prev = atom.Swap(true) 126 require.False(t, prev, "Expected Swap to return previous value.") 127} 128 129func TestFloat64(t *testing.T) { 130 atom := NewFloat64(4.2) 131 132 require.Equal(t, float64(4.2), atom.Load(), "Load didn't work.") 133 134 require.True(t, atom.CAS(4.2, 0.5), "CAS didn't report a swap.") 135 require.Equal(t, float64(0.5), atom.Load(), "CAS didn't set the correct value.") 136 require.False(t, atom.CAS(0.0, 1.5), "CAS reported a swap.") 137 138 atom.Store(42.0) 139 require.Equal(t, float64(42.0), atom.Load(), "Store didn't set the correct value.") 140 require.Equal(t, float64(42.5), atom.Add(0.5), "Add didn't work.") 141 require.Equal(t, float64(42.0), atom.Sub(0.5), "Sub didn't work.") 142} 143 144func TestDuration(t *testing.T) { 145 atom := NewDuration(5 * time.Minute) 146 147 require.Equal(t, 5*time.Minute, atom.Load(), "Load didn't work.") 148 require.Equal(t, 6*time.Minute, atom.Add(time.Minute), "Add didn't work.") 149 require.Equal(t, 4*time.Minute, atom.Sub(2*time.Minute), "Sub didn't work.") 150 151 require.True(t, atom.CAS(4*time.Minute, time.Minute), "CAS didn't report a swap.") 152 require.Equal(t, time.Minute, atom.Load(), "CAS didn't set the correct value.") 153 154 require.Equal(t, time.Minute, atom.Swap(2*time.Minute), "Swap didn't return the old value.") 155 require.Equal(t, 2*time.Minute, atom.Load(), "Swap didn't set the correct value.") 156 157 atom.Store(10 * time.Minute) 158 require.Equal(t, 10*time.Minute, atom.Load(), "Store didn't set the correct value.") 159} 160 161func TestValue(t *testing.T) { 162 var v Value 163 assert.Nil(t, v.Load(), "initial Value is not nil") 164 165 v.Store(42) 166 assert.Equal(t, 42, v.Load()) 167 168 v.Store(84) 169 assert.Equal(t, 84, v.Load()) 170 171 assert.Panics(t, func() { v.Store("foo") }) 172} 173