ContainerImage.Pinniped/test/library/iotest.go

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// Copyright 2020 the Pinniped contributors. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
package library
import (
"fmt"
"io"
"regexp"
"testing"
)
// NewLoggerReader wraps an io.Reader to log its input and output. It also performs some heuristic token masking.
func NewLoggerReader(t *testing.T, name string, reader io.Reader) io.Reader {
t.Helper()
return &testlogReader{t: t, name: name, r: reader}
}
type testlogReader struct {
t *testing.T
name string
r io.Reader
}
func (l *testlogReader) Read(p []byte) (n int, err error) {
l.t.Helper()
n, err = l.r.Read(p)
if err != nil {
l.t.Logf("%s > %q: %v", l.name, maskTokens(p[0:n]), err)
} else {
l.t.Logf("%s > %q", l.name, maskTokens(p[0:n]))
}
return
}
//nolint: gochecknoglobals
var tokenLike = regexp.MustCompile(`(?mi)[a-zA-Z0-9._-]{30,}|[a-zA-Z0-9]{20,}`)
func maskTokens(in []byte) string {
return tokenLike.ReplaceAllStringFunc(string(in), func(t string) string {
return fmt.Sprintf("[...%d bytes...]", len(t))
})
}