1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
// SPDX-License-Identifier: GPL-3.0-or-later
package logs
import (
"os"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestReadLastLine(t *testing.T) {
tests := []struct {
name string
content string
expected string
err error
}{
{"empty", "", "", nil},
{"empty-ln", "\n", "\n", nil},
{"one-line", "hello", "hello", nil},
{"one-line-ln", "hello\n", "hello\n", nil},
{"multi-line", "hello\nworld", "world", nil},
{"multi-line-ln", "hello\nworld\n", "world\n", nil},
{"long-line", "hello hello hello", "", ErrTooLongLine},
{"long-line-ln", "hello hello hello\n", "", ErrTooLongLine},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
filename := prepareFile(t, test.content)
defer func() { _ = os.Remove(filename) }()
line, err := ReadLastLine(filename, 10)
if test.err != nil {
require.NotNil(t, err)
assert.Contains(t, err.Error(), test.err.Error())
} else {
assert.Equal(t, test.expected, string(line))
}
})
}
}
func prepareFile(t *testing.T, content string) string {
t.Helper()
file, err := os.CreateTemp("", "go-test")
require.NoError(t, err)
defer func() { _ = file.Close() }()
_, _ = file.WriteString(content)
return file.Name()
}
|
