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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 sandbox
import (
"bytes"
"fmt"
"math"
"strings"
"testing"
)
func TestTotalSystemMemory(t *testing.T) {
for _, tc := range []struct {
name string
content string
want uint64
err string
}{
{
name: "simple",
content: "MemTotal: 123\n",
want: 123,
},
{
name: "kb",
content: "MemTotal: 123 kB\n",
want: 123 * 1024,
},
{
name: "multi-line",
content: "Something: 123\nMemTotal: 456\nAnotherThing: 789\n",
want: 456,
},
{
name: "not-found",
content: "Something: 123 kB\nAnotherThing: 789 kB\n",
err: "not found",
},
{
name: "no-number",
content: "MemTotal: \n",
err: "malformed",
},
{
name: "only-unit",
content: "MemTotal: kB\n",
err: "invalid syntax",
},
{
name: "negative",
content: "MemTotal: -1\n",
err: "invalid syntax",
},
{
name: "overflow",
content: fmt.Sprintf("MemTotal: %d kB\n", uint64(math.MaxUint64)),
err: "too large",
},
{
name: "unkown-unit",
content: "MemTotal: 123 mB\n",
err: "unknown unit",
},
} {
t.Run(tc.name, func(t *testing.T) {
mem, err := parseTotalSystemMemory(bytes.NewReader([]byte(tc.content)))
if len(tc.err) > 0 {
if err == nil || !strings.Contains(err.Error(), tc.err) {
t.Errorf("parseTotalSystemMemory(%q) invalid error: %v, want: %v", tc.content, err, tc.err)
}
} else {
if tc.want != mem {
t.Errorf("parseTotalSystemMemory(%q) got: %v, want: %v", tc.content, mem, tc.want)
}
}
})
}
}
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