Shadow atomic.Value from sync/atomic (#19)

atomic.go

@@ -298,3 +298,7 @@ func (f *Float64) Sub(s float64) float64 {
 func (f *Float64) CAS(old, new float64) bool {
 	return atomic.CompareAndSwapUint64(&f.v, math.Float64bits(old), math.Float64bits(new))
 }
+
+// Value shadows the type of the same name from sync/atomic
+// https://godoc.org/sync/atomic#Value
+type Value struct{ atomic.Value }

atomic_test.go

@@ -23,6 +23,7 @@ package atomic
 import (
 	"testing"
 
+	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
 
@@ -131,3 +132,16 @@ func TestFloat64(t *testing.T) {
 	require.Equal(t, float64(42.5), atom.Add(0.5), "Add didn't work.")
 	require.Equal(t, float64(42.0), atom.Sub(0.5), "Sub didn't work.")
 }
+
+func TestValue(t *testing.T) {
+	var v Value
+	assert.Nil(t, v.Load(), "initial Value is not nil")
+
+	v.Store(42)
+	assert.Equal(t, 42, v.Load())
+
+	v.Store(84)
+	assert.Equal(t, 84, v.Load())
+
+	assert.Panics(t, func() { v.Store("foo") })
+}