fcee603081
Previously if the only names defined by _test packages were examples,
the gotest script would emit an incorrect _testmain.go file.
I worked around that by marking the example_test.go files +build ignored.
This CL changes the gotest script to handle this case correctly,
and removes the now-unnecessary build tags.
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/214039
From-SVN: r280085
52 lines
1.2 KiB
Go
52 lines
1.2 KiB
Go
// Copyright 2017 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 hash_test
|
|
|
|
import (
|
|
"bytes"
|
|
"crypto/sha256"
|
|
"encoding"
|
|
"fmt"
|
|
"log"
|
|
)
|
|
|
|
func Example_binaryMarshaler() {
|
|
const (
|
|
input1 = "The tunneling gopher digs downwards, "
|
|
input2 = "unaware of what he will find."
|
|
)
|
|
|
|
first := sha256.New()
|
|
first.Write([]byte(input1))
|
|
|
|
marshaler, ok := first.(encoding.BinaryMarshaler)
|
|
if !ok {
|
|
log.Fatal("first does not implement encoding.BinaryMarshaler")
|
|
}
|
|
state, err := marshaler.MarshalBinary()
|
|
if err != nil {
|
|
log.Fatal("unable to marshal hash:", err)
|
|
}
|
|
|
|
second := sha256.New()
|
|
|
|
unmarshaler, ok := second.(encoding.BinaryUnmarshaler)
|
|
if !ok {
|
|
log.Fatal("second does not implement encoding.BinaryUnmarshaler")
|
|
}
|
|
if err := unmarshaler.UnmarshalBinary(state); err != nil {
|
|
log.Fatal("unable to unmarshal hash:", err)
|
|
}
|
|
|
|
first.Write([]byte(input2))
|
|
second.Write([]byte(input2))
|
|
|
|
fmt.Printf("%x\n", first.Sum(nil))
|
|
fmt.Println(bytes.Equal(first.Sum(nil), second.Sum(nil)))
|
|
// Output:
|
|
// 57d51a066f3a39942649cd9a76c77e97ceab246756ff3888659e6aa5a07f4a52
|
|
// true
|
|
}
|