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node_exporter/collector/textfile_test.go

81 lines
2.1 KiB

// Copyright 2015 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 collector
import (
"io/ioutil"
"sort"
"strings"
"testing"
"github.com/golang/protobuf/proto"
"github.com/prometheus/common/log"
"gopkg.in/alecthomas/kingpin.v2"
)
func TestParseTextFiles(t *testing.T) {
tests := []struct {
path string
out string
}{
{
path: "fixtures/textfile/no_metric_files",
out: "fixtures/textfile/no_metric_files.out",
},
{
path: "fixtures/textfile/two_metric_files",
out: "fixtures/textfile/two_metric_files.out",
},
{
path: "fixtures/textfile/nonexistent_path",
out: "fixtures/textfile/nonexistent_path.out",
},
}
for i, test := range tests {
c := textFileCollector{
path: test.path,
}
// Suppress a log message about `nonexistent_path` not existing, this is
// expected and clutters the test output.
log.AddFlags(kingpin.CommandLine)
_, err := kingpin.CommandLine.Parse([]string{"--log.level", "fatal"})
if err != nil {
t.Fatal(err)
}
mfs := c.parseTextFiles()
textMFs := make([]string, 0, len(mfs))
for _, mf := range mfs {
if mf.GetName() == "node_textfile_mtime" {
mf.GetMetric()[0].GetGauge().Value = proto.Float64(1)
mf.GetMetric()[1].GetGauge().Value = proto.Float64(2)
}
textMFs = append(textMFs, proto.MarshalTextString(mf))
}
sort.Strings(textMFs)
got := strings.Join(textMFs, "")
want, err := ioutil.ReadFile(test.out)
if err != nil {
t.Fatalf("%d. error reading fixture file %s: %s", i, test.out, err)
}
if string(want) != got {
t.Fatalf("%d. want:\n\n%s\n\ngot:\n\n%s", i, string(want), got)
}
}
}