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Source file src/crypto/rand/rand_test.go

Documentation: crypto/rand

  // Copyright 2010 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 rand
  
  import (
  	"bytes"
  	"compress/flate"
  	"io"
  	"testing"
  )
  
  func TestRead(t *testing.T) {
  	var n int = 4e6
  	if testing.Short() {
  		n = 1e5
  	}
  	b := make([]byte, n)
  	n, err := io.ReadFull(Reader, b)
  	if n != len(b) || err != nil {
  		t.Fatalf("ReadFull(buf) = %d, %s", n, err)
  	}
  
  	var z bytes.Buffer
  	f, _ := flate.NewWriter(&z, 5)
  	f.Write(b)
  	f.Close()
  	if z.Len() < len(b)*99/100 {
  		t.Fatalf("Compressed %d -> %d", len(b), z.Len())
  	}
  }
  
  func TestReadEmpty(t *testing.T) {
  	n, err := Reader.Read(make([]byte, 0))
  	if n != 0 || err != nil {
  		t.Fatalf("Read(make([]byte, 0)) = %d, %v", n, err)
  	}
  	n, err = Reader.Read(nil)
  	if n != 0 || err != nil {
  		t.Fatalf("Read(nil) = %d, %v", n, err)
  	}
  }
  

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