rand_test.go

Documentation: crypto/rand

		 1  // Copyright 2010 The Go Authors. All rights reserved.
		 2  // Use of this source code is governed by a BSD-style
		 3  // license that can be found in the LICENSE file.
		 4  
		 5  package rand
		 6  
		 7  import (
		 8  	"bytes"
		 9  	"compress/flate"
		10  	"io"
		11  	"testing"
		12  )
		13  
		14  func TestRead(t *testing.T) {
		15  	var n int = 4e6
		16  	if testing.Short() {
		17  		n = 1e5
		18  	}
		19  	b := make([]byte, n)
		20  	n, err := io.ReadFull(Reader, b)
		21  	if n != len(b) || err != nil {
		22  		t.Fatalf("ReadFull(buf) = %d, %s", n, err)
		23  	}
		24  
		25  	var z bytes.Buffer
		26  	f, _ := flate.NewWriter(&z, 5)
		27  	f.Write(b)
		28  	f.Close()
		29  	if z.Len() < len(b)*99/100 {
		30  		t.Fatalf("Compressed %d -> %d", len(b), z.Len())
		31  	}
		32  }
		33  
		34  func TestReadEmpty(t *testing.T) {
		35  	n, err := Reader.Read(make([]byte, 0))
		36  	if n != 0 || err != nil {
		37  		t.Fatalf("Read(make([]byte, 0)) = %d, %v", n, err)
		38  	}
		39  	n, err = Reader.Read(nil)
		40  	if n != 0 || err != nil {
		41  		t.Fatalf("Read(nil) = %d, %v", n, err)
		42  	}
		43  }
		44
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