| // Copyright (c) 2020 Uber Technologies, Inc. |
| // |
| // Permission is hereby granted, free of charge, to any person obtaining a copy |
| // of this software and associated documentation files (the "Software"), to deal |
| // in the Software without restriction, including without limitation the rights |
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| // copies of the Software, and to permit persons to whom the Software is |
| // furnished to do so, subject to the following conditions: |
| // |
| // The above copyright notice and this permission notice shall be included in |
| // all copies or substantial portions of the Software. |
| // |
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| // THE SOFTWARE. |
| |
| package atomic |
| |
| import ( |
| "encoding/json" |
| "math" |
| "testing" |
| |
| "github.com/stretchr/testify/assert" |
| "github.com/stretchr/testify/require" |
| ) |
| |
| func TestUint32(t *testing.T) { |
| atom := NewUint32(42) |
| |
| require.Equal(t, uint32(42), atom.Load(), "Load didn't work.") |
| require.Equal(t, uint32(46), atom.Add(4), "Add didn't work.") |
| require.Equal(t, uint32(44), atom.Sub(2), "Sub didn't work.") |
| require.Equal(t, uint32(45), atom.Inc(), "Inc didn't work.") |
| require.Equal(t, uint32(44), atom.Dec(), "Dec didn't work.") |
| |
| require.True(t, atom.CAS(44, 0), "CAS didn't report a swap.") |
| require.Equal(t, uint32(0), atom.Load(), "CAS didn't set the correct value.") |
| |
| require.Equal(t, uint32(0), atom.Swap(1), "Swap didn't return the old value.") |
| require.Equal(t, uint32(1), atom.Load(), "Swap didn't set the correct value.") |
| |
| atom.Store(42) |
| require.Equal(t, uint32(42), atom.Load(), "Store didn't set the correct value.") |
| |
| t.Run("JSON/Marshal", func(t *testing.T) { |
| bytes, err := json.Marshal(atom) |
| require.NoError(t, err, "json.Marshal errored unexpectedly.") |
| require.Equal(t, []byte("42"), bytes, "json.Marshal encoded the wrong bytes.") |
| }) |
| |
| t.Run("JSON/Unmarshal", func(t *testing.T) { |
| err := json.Unmarshal([]byte("40"), &atom) |
| require.NoError(t, err, "json.Unmarshal errored unexpectedly.") |
| require.Equal(t, uint32(40), atom.Load(), "json.Unmarshal didn't set the correct value.") |
| }) |
| |
| t.Run("JSON/Unmarshal/Error", func(t *testing.T) { |
| err := json.Unmarshal([]byte(`"40"`), &atom) |
| require.Error(t, err, "json.Unmarshal didn't error as expected.") |
| assertErrorJSONUnmarshalType(t, err, |
| "json.Unmarshal failed with unexpected error %v, want UnmarshalTypeError.", err) |
| }) |
| |
| t.Run("String", func(t *testing.T) { |
| // Use an integer with the signed bit set. If we're converting |
| // incorrectly, we'll get a negative value here. |
| atom := NewUint32(math.MaxUint32) |
| assert.Equal(t, "4294967295", atom.String(), |
| "String() returned an unexpected value.") |
| }) |
| } |