refactor: move accesslog to logging/accesslog

internal/logging/accesslog/mock_file.go

@@ -0,0 +1,49 @@
+package accesslog
+
+import (
+	"bytes"
+	"io"
+
+	"github.com/spf13/afero"
+)
+
+type noLock struct{}
+
+func (noLock) Lock()   {}
+func (noLock) Unlock() {}
+
+type MockFile struct {
+	afero.File
+	noLock
+}
+
+func NewMockFile() *MockFile {
+	f, _ := afero.TempFile(afero.NewMemMapFs(), "", "")
+	return &MockFile{
+		File: f,
+	}
+}
+
+func (m *MockFile) Len() int64 {
+	filesize, _ := m.Seek(0, io.SeekEnd)
+	_, _ = m.Seek(0, io.SeekStart)
+	return filesize
+}
+
+func (m *MockFile) Content() []byte {
+	buf := bytes.NewBuffer(nil)
+	m.Seek(0, io.SeekStart)
+	_, _ = buf.ReadFrom(m.File)
+	m.Seek(0, io.SeekStart)
+	return buf.Bytes()
+}
+
+func (m *MockFile) NumLines() int {
+	content := m.Content()
+	count := bytes.Count(content, []byte("\n"))
+	// account for last line if it does not end with a newline
+	if len(content) > 0 && content[len(content)-1] != '\n' {
+		count++
+	}
+	return count
+}