mime/quotedprintable: add examples

Partially addresses #16360

Change-Id: Ic098d2c465742fb50aee325a3fd0e1d50b7b3c99
Reviewed-on: https://go-review.googlesource.com/25575
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

diff --git a/src/mime/quotedprintable/example_test.go b/src/mime/quotedprintable/example_test.go
new file mode 100644 (file)
index 0000000..1ef841e
--- /dev/null
+++ b/src/mime/quotedprintable/example_test.go
@@ -0,0 +1,37 @@
+// Copyright 2016 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 quotedprintable_test
+
+import (
+       "fmt"
+       "io/ioutil"
+       "mime/quotedprintable"
+       "os"
+       "strings"
+)
+
+func ExampleNewReader() {
+       for _, s := range []string{
+               `=48=65=6C=6C=6F=2C=20=47=6F=70=68=65=72=73=21`,
+               `invalid escape: =B`,
+               "Hello, Gophers! This symbol will be unescaped: =3D and this will be written in =\r\none line.",
+       } {
+               b, err := ioutil.ReadAll(quotedprintable.NewReader(strings.NewReader(s)))
+               fmt.Printf("%s %v\n", b, err)
+       }
+       // Output:
+       // Hello, Gophers! <nil>
+       // invalid escape:  unexpected EOF
+       // Hello, Gophers! This symbol will be unescaped: = and this will be written in one line. <nil>
+}
+
+func ExampleNewWriter() {
+       w := quotedprintable.NewWriter(os.Stdout)
+       w.Write([]byte("These symbols will be escaped: = \t"))
+       w.Close()
+
+       // Output:
+       // These symbols will be escaped: =3D =09
+}