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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 (
"reflect"
"testing"
)
func TestSwaps(t *testing.T) {
fs, err := NewFS(procTestFixtures)
if err != nil {
t.Fatalf("failed to open procfs: %v", err)
}
swaps, err := fs.Swaps()
if err != nil {
t.Fatalf("failed to get swaps: %v", err)
}
if len(swaps) != 1 {
t.Fatalf("expected 1 swap entry, got %d", len(swaps))
}
swap := swaps[0]
if swap.Filename != "/dev/dm-2" {
t.Errorf("expected swap.Filename /dev/dm-2, got %s", swap.Filename)
}
if swap.Type != "partition" {
t.Errorf("expected swap.Type partition, got %s", swap.Type)
}
if swap.Size != 131068 {
t.Errorf("expected swap.Size 131068, got %d", swap.Size)
}
if swap.Used != 176 {
t.Errorf("expected swap.Used 176, got %d", swap.Used)
}
if swap.Priority != -2 {
t.Errorf("expected swap.Priority -2, got %d", swap.Priority)
}
}
func TestParseSwapString(t *testing.T) {
tests := []struct {
name string
s string
swap *Swap
invalid bool
}{
{
name: "device-mapper volume",
s: "/dev/dm-2 partition 131068 1024 -2",
invalid: false,
swap: &Swap{
Filename: "/dev/dm-2",
Type: "partition",
Size: 131068,
Used: 1024,
Priority: -2,
},
},
{
name: "Swap file",
s: "/foo file 1048572 0 -3",
invalid: false,
swap: &Swap{
Filename: "/foo",
Type: "file",
Size: 1048572,
Used: 0,
Priority: -3,
},
},
{
name: "Invalid number",
s: "/dev/sda2 partition hello world -2",
invalid: true,
},
{
name: "Not enough fields",
s: "/dev/dm-2 partition 131068 1024",
invalid: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
swap, err := parseSwapString(tt.s)
if tt.invalid && err == nil {
t.Error("unexpected success")
}
if !tt.invalid && err != nil {
t.Errorf("unexpected error: %v", err)
}
if !reflect.DeepEqual(tt.swap, swap) {
t.Errorf("swap:\nwant:\n%+v\nhave:\n%+v", tt.swap, swap)
}
})
}
}