1// Copyright (c) 2020 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 "encoding/json" 25 "testing" 26 27 "github.com/stretchr/testify/assert" 28 "github.com/stretchr/testify/require" 29) 30 31func TestFloat64(t *testing.T) { 32 atom := NewFloat64(4.2) 33 34 require.Equal(t, float64(4.2), atom.Load(), "Load didn't work.") 35 36 require.True(t, atom.CAS(4.2, 0.5), "CAS didn't report a swap.") 37 require.Equal(t, float64(0.5), atom.Load(), "CAS didn't set the correct value.") 38 require.False(t, atom.CAS(0.0, 1.5), "CAS reported a swap.") 39 40 atom.Store(42.0) 41 require.Equal(t, float64(42.0), atom.Load(), "Store didn't set the correct value.") 42 require.Equal(t, float64(42.5), atom.Add(0.5), "Add didn't work.") 43 require.Equal(t, float64(42.0), atom.Sub(0.5), "Sub didn't work.") 44 45 t.Run("JSON/Marshal", func(t *testing.T) { 46 atom.Store(42.5) 47 bytes, err := json.Marshal(atom) 48 require.NoError(t, err, "json.Marshal errored unexpectedly.") 49 require.Equal(t, []byte("42.5"), bytes, "json.Marshal encoded the wrong bytes.") 50 }) 51 52 t.Run("JSON/Unmarshal", func(t *testing.T) { 53 err := json.Unmarshal([]byte("40.5"), &atom) 54 require.NoError(t, err, "json.Unmarshal errored unexpectedly.") 55 require.Equal(t, float64(40.5), atom.Load(), "json.Unmarshal didn't set the correct value.") 56 }) 57 58 t.Run("JSON/Unmarshal/Error", func(t *testing.T) { 59 err := json.Unmarshal([]byte("\"40.5\""), &atom) 60 require.Error(t, err, "json.Unmarshal didn't error as expected.") 61 assertErrorJSONUnmarshalType(t, err, 62 "json.Unmarshal failed with unexpected error %v, want UnmarshalTypeError.", err) 63 }) 64 65 t.Run("String", func(t *testing.T) { 66 assert.Equal(t, "42.5", NewFloat64(42.5).String(), 67 "String() returned an unexpected value.") 68 }) 69} 70