| // Copyright (c) 2016-2020 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" |
| "encoding/xml" |
| "testing" |
| |
| "github.com/stretchr/testify/assert" |
| "github.com/stretchr/testify/require" |
| ) |
| |
| func TestStringNoInitialValue(t *testing.T) { |
| atom := &String{} |
| require.Equal(t, "", atom.Load(), "Initial value should be blank string") |
| } |
| |
| func TestString(t *testing.T) { |
| atom := NewString("") |
| require.Equal(t, "", atom.Load(), "Expected Load to return initialized value") |
| |
| atom.Store("abc") |
| require.Equal(t, "abc", atom.Load(), "Unexpected value after Store") |
| |
| atom = NewString("bcd") |
| require.Equal(t, "bcd", atom.Load(), "Expected Load to return initialized 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(`"bcd"`), bytes, "json.Marshal encoded the wrong bytes.") |
| }) |
| |
| t.Run("JSON/Unmarshal", func(t *testing.T) { |
| err := json.Unmarshal([]byte(`"abc"`), &atom) |
| require.NoError(t, err, "json.Unmarshal errored unexpectedly.") |
| require.Equal(t, "abc", 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) |
| }) |
| |
| atom = NewString("foo") |
| |
| t.Run("XML/Marshal", func(t *testing.T) { |
| bytes, err := xml.Marshal(atom) |
| require.NoError(t, err, "xml.Marshal errored unexpectedly.") |
| require.Equal(t, []byte("<String>foo</String>"), bytes, "xml.Marshal encoded the wrong bytes.") |
| }) |
| |
| t.Run("XML/Unmarshal", func(t *testing.T) { |
| err := xml.Unmarshal([]byte("<String>bar</String>"), &atom) |
| require.NoError(t, err, "xml.Unmarshal errored unexpectedly.") |
| require.Equal(t, "bar", atom.Load(), "xml.Unmarshal didn't set the correct value.") |
| }) |
| |
| t.Run("String", func(t *testing.T) { |
| atom := NewString("foo") |
| assert.Equal(t, "foo", atom.String(), |
| "String() returned an unexpected value.") |
| }) |
| |
| t.Run("CompareAndSwap", func(t *testing.T) { |
| atom := NewString("foo") |
| |
| swapped := atom.CompareAndSwap("bar", "bar") |
| require.False(t, swapped, "swapped isn't false") |
| require.Equal(t, atom.Load(), "foo", "Load returned wrong value") |
| |
| swapped = atom.CompareAndSwap("foo", "bar") |
| require.True(t, swapped, "swapped isn't true") |
| require.Equal(t, atom.Load(), "bar", "Load returned wrong value") |
| }) |
| |
| t.Run("Swap", func(t *testing.T) { |
| atom := NewString("foo") |
| |
| old := atom.Swap("bar") |
| require.Equal(t, old, "foo", "Swap returned wrong value") |
| require.Equal(t, atom.Load(), "bar", "Load returned wrong value") |
| }) |
| } |
| |
| func TestString_InitializeDefault(t *testing.T) { |
| tests := []struct { |
| msg string |
| newStr func() *String |
| }{ |
| { |
| msg: "Uninitialized", |
| newStr: func() *String { |
| var s String |
| return &s |
| }, |
| }, |
| { |
| msg: "NewString with default", |
| newStr: func() *String { |
| return NewString("") |
| }, |
| }, |
| { |
| msg: "String swapped with default", |
| newStr: func() *String { |
| s := NewString("initial") |
| s.Swap("") |
| return s |
| }, |
| }, |
| { |
| msg: "String CAS'd with default", |
| newStr: func() *String { |
| s := NewString("initial") |
| s.CompareAndSwap("initial", "") |
| return s |
| }, |
| }, |
| } |
| |
| for _, tt := range tests { |
| t.Run(tt.msg, func(t *testing.T) { |
| t.Run("MarshalText", func(t *testing.T) { |
| str := tt.newStr() |
| text, err := str.MarshalText() |
| require.NoError(t, err) |
| assert.Equal(t, "", string(text), "") |
| }) |
| |
| t.Run("String", func(t *testing.T) { |
| str := tt.newStr() |
| assert.Equal(t, "", str.String()) |
| }) |
| |
| t.Run("CompareAndSwap", func(t *testing.T) { |
| str := tt.newStr() |
| require.True(t, str.CompareAndSwap("", "new")) |
| assert.Equal(t, "new", str.Load()) |
| }) |
| |
| t.Run("Swap", func(t *testing.T) { |
| str := tt.newStr() |
| assert.Equal(t, "", str.Swap("new")) |
| }) |
| }) |
| } |
| } |