package afero

import (
	"io"
	"testing"
)

func TestMemFileRead(t *testing.T) {
	f := MemFileCreate("testfile")
	f.WriteString("abcd")
	f.Seek(0, 0)
	b := make([]byte, 8)
	n, err := f.Read(b)
	if n != 4 {
		t.Errorf("didn't read all bytes: %v %v %v", n, err, b)
	}
	if err != nil {
		t.Errorf("err is not nil: %v %v %v", n, err, b)
	}
	n, err = f.Read(b)
	if n != 0 {
		t.Errorf("read more bytes: %v %v %v", n, err, b)
	}
	if err != io.EOF {
		t.Errorf("error is not EOF: %v %v %v", n, err, b)
	}
}