package readers import (	"io"	"io/ioutil"	"testing" 	"github.com/stretchr/testify/assert"	"github.com/stretchr/testify/require") func TestPatternReader(t *testing.T) {	b2 := make([]byte, 1) 	r := NewPatternReader(0)	b, err := ioutil.ReadAll(r)	require.NoError(t, err)	assert.Equal(t, []byte{}, b)	n, err := r.Read(b2)	require.Equal(t, io.EOF, err)	require.Equal(t, 0, n) 	r = NewPatternReader(10)	b, err = ioutil.ReadAll(r)	require.NoError(t, err)	assert.Equal(t, []byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}, b)	n, err = r.Read(b2)	require.Equal(t, io.EOF, err)	require.Equal(t, 0, n)}