123456789101112131415161718192021222324252627282930313233343536373839 |
- // Copyright 2019 The Go Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style
- // license that can be found in the LICENSE file.
- package iotest
- import (
- "bytes"
- "testing"
- )
- var truncateWriterTests = []struct {
- in string
- want string
- trunc int64
- n int
- }{
- {"hello", "", -1, 5},
- {"world", "", 0, 5},
- {"abcde", "abc", 3, 5},
- {"edcba", "edcba", 7, 5},
- }
- func TestTruncateWriter(t *testing.T) {
- for _, tt := range truncateWriterTests {
- buf := new(bytes.Buffer)
- tw := TruncateWriter(buf, tt.trunc)
- n, err := tw.Write([]byte(tt.in))
- if err != nil {
- t.Errorf("Unexpected error %v for\n\t%+v", err, tt)
- }
- if g, w := buf.String(), tt.want; g != w {
- t.Errorf("got %q, expected %q", g, w)
- }
- if g, w := n, tt.n; g != w {
- t.Errorf("read %d bytes, but expected to have read %d bytes for\n\t%+v", g, w, tt)
- }
- }
- }
|