| // 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" |
| "testing" |
| |
| "github.com/stretchr/testify/assert" |
| "github.com/stretchr/testify/require" |
| ) |
| |
| func TestBool(t *testing.T) { |
| atom := NewBool(false) |
| require.False(t, atom.Toggle(), "Expected Toggle to return previous value.") |
| require.True(t, atom.Toggle(), "Expected Toggle to return previous value.") |
| require.False(t, atom.Toggle(), "Expected Toggle to return previous value.") |
| require.True(t, atom.Load(), "Unexpected state after swap.") |
| |
| require.True(t, atom.CAS(true, true), "CAS should swap when old matches") |
| require.True(t, atom.Load(), "CAS should have no effect") |
| require.True(t, atom.CAS(true, false), "CAS should swap when old matches") |
| require.False(t, atom.Load(), "CAS should have modified the value") |
| require.False(t, atom.CAS(true, false), "CAS should fail on old mismatch") |
| require.False(t, atom.Load(), "CAS should not have modified the value") |
| |
| atom.Store(false) |
| require.False(t, atom.Load(), "Unexpected state after store.") |
| |
| prev := atom.Swap(false) |
| require.False(t, prev, "Expected Swap to return previous value.") |
| |
| prev = atom.Swap(true) |
| require.False(t, prev, "Expected Swap to return previous value.") |
| |
| t.Run("JSON/Marshal", func(t *testing.T) { |
| atom.Store(true) |
| bytes, err := json.Marshal(atom) |
| require.NoError(t, err, "json.Marshal errored unexpectedly.") |
| require.Equal(t, []byte("true"), bytes, "json.Marshal encoded the wrong bytes.") |
| }) |
| |
| t.Run("JSON/Unmarshal", func(t *testing.T) { |
| err := json.Unmarshal([]byte("false"), &atom) |
| require.NoError(t, err, "json.Unmarshal errored unexpectedly.") |
| require.False(t, atom.Load(), "json.Unmarshal didn't set the correct value.") |
| }) |
| |
| t.Run("JSON/Unmarshal/Error", func(t *testing.T) { |
| err := json.Unmarshal([]byte("42"), &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) { |
| t.Run("true", func(t *testing.T) { |
| assert.Equal(t, "true", NewBool(true).String(), |
| "String() returned an unexpected value.") |
| }) |
| |
| t.Run("false", func(t *testing.T) { |
| var b Bool |
| assert.Equal(t, "false", b.String(), |
| "String() returned an unexpected value.") |
| }) |
| }) |
| } |
| |
| func TestBool_InitializeDefaults(t *testing.T) { |
| tests := []struct { |
| msg string |
| newBool func() *Bool |
| }{ |
| { |
| msg: "Uninitialized", |
| newBool: func() *Bool { |
| var b Bool |
| return &b |
| }, |
| }, |
| { |
| msg: "NewBool with default", |
| newBool: func() *Bool { |
| return NewBool(false) |
| }, |
| }, |
| { |
| msg: "Bool swapped with default", |
| newBool: func() *Bool { |
| b := NewBool(true) |
| b.Swap(false) |
| return b |
| }, |
| }, |
| { |
| msg: "Bool CAS'd with default", |
| newBool: func() *Bool { |
| b := NewBool(true) |
| b.CompareAndSwap(true, false) |
| return b |
| }, |
| }, |
| } |
| |
| for _, tt := range tests { |
| t.Run(tt.msg, func(t *testing.T) { |
| t.Run("MarshalJSON", func(t *testing.T) { |
| b := tt.newBool() |
| marshalled, err := b.MarshalJSON() |
| require.NoError(t, err) |
| assert.Equal(t, "false", string(marshalled)) |
| }) |
| |
| t.Run("String", func(t *testing.T) { |
| b := tt.newBool() |
| assert.Equal(t, "false", b.String()) |
| }) |
| |
| t.Run("CompareAndSwap", func(t *testing.T) { |
| b := tt.newBool() |
| require.True(t, b.CompareAndSwap(false, true)) |
| assert.Equal(t, true, b.Load()) |
| }) |
| |
| t.Run("Swap", func(t *testing.T) { |
| b := tt.newBool() |
| assert.Equal(t, false, b.Swap(true)) |
| }) |
| }) |
| } |
| } |