mirror of
https://github.com/prometheus-community/windows_exporter.git
synced 2026-10-17 10:09:05 +02:00
76 lines
1.8 KiB
Go
76 lines
1.8 KiB
Go
// SPDX-License-Identifier: Apache-2.0
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//
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// Copyright The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package scrapecache_test
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import (
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"errors"
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"fmt"
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"testing"
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"github.com/prometheus-community/windows_exporter/internal/scrapecache"
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"github.com/stretchr/testify/require"
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)
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type cache struct {
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name string
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events *[]string
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}
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func (c cache) BeginScrape() {
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*c.events = append(*c.events, c.name+" begin")
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}
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func (c cache) EndScrape(err error) {
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*c.events = append(*c.events, fmt.Sprintf("%s end %v", c.name, err))
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}
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func (c cache) Reset() {
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*c.events = append(*c.events, c.name+" reset")
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}
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type owner struct {
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events []string
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calls int
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}
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func (o *owner) ScrapeCaches() []scrapecache.Cache {
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o.calls++
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return []scrapecache.Cache{cache{name: "a", events: &o.events}, cache{name: "b", events: &o.events}}
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}
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func TestOwner(t *testing.T) {
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t.Parallel()
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o := &owner{}
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scrapecache.Reset(o)
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cacheScrape := scrapecache.Begin(o)
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require.Equal(t, []string{"a reset", "b reset", "a begin", "b begin"}, o.events)
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cacheScrape.End(errors.New("failed"))
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require.Equal(t, []string{"a end failed", "b end failed"}, o.events[4:])
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require.Equal(t, 2, o.calls, "Begin asks for the caches once per scrape")
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}
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func TestNotAnOwner(t *testing.T) {
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t.Parallel()
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scrapecache.Reset(struct{}{})
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scrapecache.Begin(struct{}{}).End(errors.New("ignored"))
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}
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