AdGuardHome/internal/aghos/os_test.go

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package aghos
import (
"bytes"
"testing"
"github.com/AdguardTeam/AdGuardHome/internal/aghio"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestLargestLabeled(t *testing.T) {
const (
comm = `command-name`
nl = "\n"
)
testCases := []struct {
name string
data []byte
wantPID int
wantInstNum int
}{{
name: "success",
data: []byte(nl +
` 123 not-a-` + comm + nl +
` 321 ` + comm + nl,
),
wantPID: 321,
wantInstNum: 1,
}, {
name: "several",
data: []byte(nl +
`1 ` + comm + nl +
`5 /` + comm + nl +
`2 /some/path/` + comm + nl +
`4 ./` + comm + nl +
`3 ` + comm + nl +
`10 .` + comm + nl,
),
wantPID: 5,
wantInstNum: 5,
}, {
name: "no_any",
data: []byte(nl +
`1 ` + `not-a-` + comm + nl +
`2 ` + `not-a-` + comm + nl +
`3 ` + `not-a-` + comm + nl,
),
wantPID: 0,
wantInstNum: 0,
}, {
name: "weird_input",
data: []byte(nl +
`abc ` + comm + nl +
`-1 ` + comm + nl,
),
wantPID: 0,
wantInstNum: 0,
}}
for _, tc := range testCases {
r := bytes.NewReader(tc.data)
t.Run(tc.name, func(t *testing.T) {
pid, instNum, err := parsePSOutput(r, comm)
require.NoError(t, err)
assert.Equal(t, tc.wantPID, pid)
assert.Equal(t, tc.wantInstNum, instNum)
})
}
t.Run("scanner_fail", func(t *testing.T) {
lr, err := aghio.LimitReader(bytes.NewReader([]byte{1, 2, 3}), 0)
require.NoError(t, err)
target := &aghio.LimitReachedError{}
_, _, err = parsePSOutput(lr, "")
require.ErrorAs(t, err, &target)
assert.EqualValues(t, 0, target.Limit)
})
t.Run("ignore", func(t *testing.T) {
r := bytes.NewReader([]byte(nl +
`1 ` + comm + nl +
`2 ` + comm + nl +
`3` + comm + nl,
))
pid, instances, err := parsePSOutput(r, comm, 1, 3)
require.NoError(t, err)
assert.Equal(t, 2, pid)
assert.Equal(t, 1, instances)
})
}