Add NewTicker to the Clock Interface

clock.go

@@ -20,13 +20,14 @@
 
 package zap
 
-import "time"
+import (
+	"time"
+
+	"go.uber.org/zap/zapcore"
+)
 
 // Clock is a source of time for logged entries.
-type Clock interface {
-	// Now returns the current local time.
-	Now() time.Time
-}
+type Clock zapcore.Clock
 
 // systemClock implements default Clock that uses system time.
 type systemClock struct{}
@@ -36,3 +37,7 @@ var _systemClock Clock = systemClock{}
 func (systemClock) Now() time.Time {
 	return time.Now()
 }
+
+func (systemClock) NewTicker(duration time.Duration) *time.Ticker {
+	return time.NewTicker(duration)
+}

clock_test.go

@@ -32,6 +32,9 @@ import (
 type constantClock time.Time
 
 func (c constantClock) Now() time.Time { return time.Time(c) }
+func (c constantClock) NewTicker(d time.Duration) *time.Ticker {
+	return time.NewTicker(d)
+}
 
 func TestWithClock(t *testing.T) {
 	date := time.Date(2077, 1, 23, 10, 15, 13, 441, time.UTC)

go.sum

@@ -5,6 +5,7 @@ github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0 h1:4G4v2dO3VZwixGIRoQ5Lfboy6nUhCyYzaqnIAPPhYs4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=

zapcore/clock.go

@@ -0,0 +1,34 @@
+// Copyright (c) 2021 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 zapcore
+
+import (
+	"time"
+)
+
+// Clock is a source of time for logged entries.
+type Clock interface {
+	// Now returns the current local time.
+	Now() time.Time
+	// NewTicker returns *time.Ticker that holds a channel
+	// that delivers ``ticks'' of a clock.
+	NewTicker(time.Duration) *time.Ticker
+}