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| // Copyright 2015 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 exec
|
| import (
| "io"
| "testing"
| )
|
| func TestPrefixSuffixSaver(t *testing.T) {
| tests := []struct {
| N int
| writes []string
| want string
| }{
| {
| N: 2,
| writes: nil,
| want: "",
| },
| {
| N: 2,
| writes: []string{"a"},
| want: "a",
| },
| {
| N: 2,
| writes: []string{"abc", "d"},
| want: "abcd",
| },
| {
| N: 2,
| writes: []string{"abc", "d", "e"},
| want: "ab\n... omitting 1 bytes ...\nde",
| },
| {
| N: 2,
| writes: []string{"ab______________________yz"},
| want: "ab\n... omitting 22 bytes ...\nyz",
| },
| {
| N: 2,
| writes: []string{"ab_______________________y", "z"},
| want: "ab\n... omitting 23 bytes ...\nyz",
| },
| }
| for i, tt := range tests {
| w := &prefixSuffixSaver{N: tt.N}
| for _, s := range tt.writes {
| n, err := io.WriteString(w, s)
| if err != nil || n != len(s) {
| t.Errorf("%d. WriteString(%q) = %v, %v; want %v, %v", i, s, n, err, len(s), nil)
| }
| }
| if got := string(w.Bytes()); got != tt.want {
| t.Errorf("%d. Bytes = %q; want %q", i, got, tt.want)
| }
| }
| }
|
|
