go example_test 源码
golang example_test 代码
文件路径：/src/crypto/sha256/example_test.go
// 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 sha256_test
import (
"crypto/sha256"
"fmt"
"io"
"log"
"os"
)
func ExampleSum256() {
sum := sha256.Sum256([]byte("hello world\n"))
fmt.Printf("%x", sum)
// Output: a948904f2f0f479b8f8197694b30184b0d2ed1c1cd2a1ec0fb85d299a192a447
}
func ExampleNew() {
h := sha256.New()
h.Write([]byte("hello world\n"))
fmt.Printf("%x", h.Sum(nil))
// Output: a948904f2f0f479b8f8197694b30184b0d2ed1c1cd2a1ec0fb85d299a192a447
}
func ExampleNew_file() {
f, err := os.Open("file.txt")
if err != nil {
log.Fatal(err)
}
defer f.Close()
h := sha256.New()
if _, err := io.Copy(h, f); err != nil {
log.Fatal(err)
}
fmt.Printf("%x", h.Sum(nil))
}
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