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// Copyright 2021 The gVisor 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 cgroupfs
import (
"fmt"
"reflect"
"testing"
"gvisor.dev/gvisor/pkg/bitmap"
)
func TestFormat(t *testing.T) {
tests := []struct {
input []uint32
output string
}{
{[]uint32{1, 2, 3, 4, 7}, "1-4,7"},
{[]uint32{2}, "2"},
{[]uint32{0, 1, 2}, "0-2"},
{[]uint32{}, ""},
{[]uint32{1, 3, 4, 5, 6, 9, 11, 13, 14, 15, 16, 17}, "1,3-6,9,11,13-17"},
{[]uint32{2, 3, 10, 12, 13, 14, 15, 16, 20, 21, 33, 34, 47}, "2-3,10,12-16,20-21,33-34,47"},
}
for i, tt := range tests {
t.Run(fmt.Sprintf("case-%d", i), func(t *testing.T) {
b := bitmap.New(64)
for _, v := range tt.input {
b.Add(v)
}
s := formatBitmap(&b)
if s != tt.output {
t.Errorf("Expected %q, got %q", tt.output, s)
}
b1, err := parseBitmap(s, 64)
if err != nil {
t.Fatalf("Failed to parse formatted bitmap: %v", err)
}
if got, want := b1.ToSlice(), b.ToSlice(); !reflect.DeepEqual(got, want) {
t.Errorf("Parsing formatted output doesn't result in the original bitmap. Got %v, want %v", got, want)
}
})
}
}
func TestParse(t *testing.T) {
tests := []struct {
input string
output []uint32
shouldFail bool
}{
{"1", []uint32{1}, false},
{"", []uint32{}, false},
{"1,2,3,4", []uint32{1, 2, 3, 4}, false},
{"1-4", []uint32{1, 2, 3, 4}, false},
{"1,2-4", []uint32{1, 2, 3, 4}, false},
{"1,2-3,4", []uint32{1, 2, 3, 4}, false},
{"1-2,3,4,10,11", []uint32{1, 2, 3, 4, 10, 11}, false},
{"1,2-4,5,16", []uint32{1, 2, 3, 4, 5, 16}, false},
{"abc", []uint32{}, true},
{"1,3-2,4", []uint32{}, true},
{"1,3-3,4", []uint32{}, true},
{"1,2,3\000,4", []uint32{1, 2, 3}, false},
{"1,2,3\n,4", []uint32{1, 2, 3}, false},
}
for i, tt := range tests {
t.Run(fmt.Sprintf("case-%d", i), func(t *testing.T) {
b, err := parseBitmap(tt.input, 64)
if tt.shouldFail {
if err == nil {
t.Fatalf("Expected parsing of %q to fail, but it didn't", tt.input)
}
return
}
if err != nil {
t.Fatalf("Failed to parse bitmap: %v", err)
return
}
got := b.ToSlice()
if !reflect.DeepEqual(got, tt.output) {
t.Errorf("Parsed bitmap doesn't match what we expected. Got %v, want %v", got, tt.output)
}
})
}
}
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