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// Copyright 2019 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 procfs
import (
"testing"
"github.com/google/go-cmp/cmp"
)
func TestLoadAvg(t *testing.T) {
fs, err := NewFS(procTestFixtures)
if err != nil {
t.Fatalf("failed to open procfs: %v", err)
}
loadavg, err := fs.LoadAvg()
if err != nil {
t.Fatalf("failed to get loadavg: %v", err)
}
if diff := cmp.Diff(0.02, loadavg.Load1); diff != "" {
t.Fatalf("unexpected LoadAvg Per a minute:\n%s", diff)
}
if diff := cmp.Diff(0.04, loadavg.Load5); diff != "" {
t.Fatalf("unexpected LoadAvg Per five minutes:\n%s", diff)
}
if diff := cmp.Diff(0.05, loadavg.Load15); diff != "" {
t.Fatalf("unexpected LoadAvg Per fifteen minutes:\n%s", diff)
}
}
func Test_parseLoad(t *testing.T) {
tests := []struct {
name string
s string
ok bool
loadavg *LoadAvg
}{
{
name: "empty",
ok: false,
},
{
name: "not enough fields",
s: `0.00 0.03`,
ok: false,
},
{
name: "invalid line",
s: `malformed line`,
ok: false,
},
{
name: "valid line",
s: `0.00 0.03 0.05 1/502 33634`,
ok: true,
loadavg: &LoadAvg{Load1: 0, Load5: 0.03, Load15: 0.05},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
loadavg, err := parseLoad([]byte(tt.s))
if err != nil {
if tt.ok {
t.Fatalf("failed to parse loadavg: %v", err)
}
t.Logf("OK error: %v", err)
return
}
if !tt.ok {
t.Fatal("expected an error, but none occurred")
}
if diff := cmp.Diff(tt.loadavg, loadavg); diff != "" {
t.Errorf("unexpected loadavg(-want +got):\n%s", diff)
}
})
}
}
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