implemented event and req

pkg/utils/atomic/bool_test.go

@@ -0,0 +1,150 @@
+// 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("Marshal", 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))
+			})
+		})
+	}
+}