custom alerting

Signed-off-by: junotx <junotx@126.com>

vendor/github.com/prometheus/prometheus/util/testutil/context.go

@@ -0,0 +1,42 @@
+// Copyright 2016 The Prometheus Authors
+// 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 testutil
+
+import "time"
+
+// A MockContext provides a simple stub implementation of a Context
+type MockContext struct {
+	Error  error
+	DoneCh chan struct{}
+}
+
+// Deadline always will return not set
+func (c *MockContext) Deadline() (deadline time.Time, ok bool) {
+	return time.Time{}, false
+}
+
+// Done returns a read channel for listening to the Done event
+func (c *MockContext) Done() <-chan struct{} {
+	return c.DoneCh
+}
+
+// Err returns the error, is nil if not set.
+func (c *MockContext) Err() error {
+	return c.Error
+}
+
+// Value ignores the Value and always returns nil
+func (c *MockContext) Value(key interface{}) interface{} {
+	return nil
+}