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// Copyright 2018 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 prometheus
import "testing"
type collectorDescribedByCollect struct {
cnt Counter
gge Gauge
}
func (c collectorDescribedByCollect) Collect(ch chan<- Metric) {
ch <- c.cnt
ch <- c.gge
}
func (c collectorDescribedByCollect) Describe(ch chan<- *Desc) {
DescribeByCollect(c, ch)
}
func TestDescribeByCollect(t *testing.T) {
goodCollector := collectorDescribedByCollect{
cnt: NewCounter(CounterOpts{Name: "c1", Help: "help c1"}),
gge: NewGauge(GaugeOpts{Name: "g1", Help: "help g1"}),
}
collidingCollector := collectorDescribedByCollect{
cnt: NewCounter(CounterOpts{Name: "c2", Help: "help c2"}),
gge: NewGauge(GaugeOpts{Name: "g1", Help: "help g1"}),
}
inconsistentCollector := collectorDescribedByCollect{
cnt: NewCounter(CounterOpts{Name: "c3", Help: "help c3"}),
gge: NewGauge(GaugeOpts{Name: "c3", Help: "help inconsistent"}),
}
reg := NewPedanticRegistry()
if err := reg.Register(goodCollector); err != nil {
t.Error("registration failed:", err)
}
if err := reg.Register(collidingCollector); err == nil {
t.Error("registration unexpectedly succeeded")
}
if err := reg.Register(inconsistentCollector); err == nil {
t.Error("registration unexpectedly succeeded")
}
if _, err := reg.Gather(); err != nil {
t.Error("gathering failed:", err)
}
}
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