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// Copyright 2016 Google LLC. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package util provides general utility functions for the CT personality.
package util
import "time"
// TimeSource can provide the current time, or be replaced by a mock in tests to return
// specific values.
type TimeSource interface {
// Now returns the current time in real implementations or a suitable value in others
Now() time.Time
}
// SystemTimeSource provides the current system local time
type SystemTimeSource struct{}
// Now returns the true current local time.
func (s SystemTimeSource) Now() time.Time {
return time.Now()
}
// FixedTimeSource provides a fixed time for use in tests.
// It should not be used in production code.
type FixedTimeSource struct {
fakeTime time.Time
}
// NewFixedTimeSource creates a FixedTimeSource instance
func NewFixedTimeSource(t time.Time) *FixedTimeSource {
return &FixedTimeSource{fakeTime: t}
}
// Now returns the time value this instance contains
func (f *FixedTimeSource) Now() time.Time {
return f.fakeTime
}
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