997edd622f
Fixes #99 The current uintptr test assumes that pointers are 64-bit, so the test fails to compile on architectures with 32-bit pointers. Instead, cast -1 to uintptr, which matches math.MaxUint64 on 64-bit architectures, and math.MaxUint32 on 32-bit architectures. Verified by using GOARCH=386
80 lines
3.2 KiB
Go
80 lines
3.2 KiB
Go
// 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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"encoding/json"
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"fmt"
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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 TestUintptr(t *testing.T) {
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atom := NewUintptr(42)
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require.Equal(t, uintptr(42), atom.Load(), "Load didn't work.")
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require.Equal(t, uintptr(46), atom.Add(4), "Add didn't work.")
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require.Equal(t, uintptr(44), atom.Sub(2), "Sub didn't work.")
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require.Equal(t, uintptr(45), atom.Inc(), "Inc didn't work.")
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require.Equal(t, uintptr(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, uintptr(0), atom.Load(), "CAS didn't set the correct value.")
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require.Equal(t, uintptr(0), atom.Swap(1), "Swap didn't return the old value.")
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require.Equal(t, uintptr(1), atom.Load(), "Swap didn't set the correct value.")
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atom.Store(42)
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require.Equal(t, uintptr(42), atom.Load(), "Store didn't set the correct value.")
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t.Run("JSON/Marshal", func(t *testing.T) {
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bytes, err := json.Marshal(atom)
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require.NoError(t, err, "json.Marshal errored unexpectedly.")
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require.Equal(t, []byte("42"), bytes, "json.Marshal encoded the wrong bytes.")
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})
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t.Run("JSON/Unmarshal", func(t *testing.T) {
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err := json.Unmarshal([]byte("40"), &atom)
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require.NoError(t, err, "json.Unmarshal errored unexpectedly.")
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require.Equal(t, uintptr(40), atom.Load(), "json.Unmarshal didn't set the correct value.")
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})
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t.Run("JSON/Unmarshal/Error", func(t *testing.T) {
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err := json.Unmarshal([]byte(`"40"`), &atom)
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require.Error(t, err, "json.Unmarshal didn't error as expected.")
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assertErrorJSONUnmarshalType(t, err,
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"json.Unmarshal failed with unexpected error %v, want UnmarshalTypeError.", err)
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})
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t.Run("String", func(t *testing.T) {
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// Use an integer with the signed bit set. If we're converting
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// incorrectly, we'll get a negative value here.
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// Use an int variable, as constants cause compile-time overflows.
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negative := -1
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atom := NewUintptr(uintptr(negative))
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want := fmt.Sprint(uintptr(negative))
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assert.Equal(t, want, atom.String(),
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"String() returned an unexpected value.")
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})
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}
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