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amfora/rr/rr_test.go
2020-12-17 11:37:48 -05:00

46 lines
1013 B
Go

package rr
import (
"io/ioutil"
"strings"
"testing"
"github.com/stretchr/testify/assert"
)
var r1 *RestartReader
func reset() {
r1 = NewRestartReader(ioutil.NopCloser(strings.NewReader("1234567890")))
}
func TestRead(t *testing.T) {
reset()
p := make([]byte, 1)
n, err := r1.Read(p)
assert.Equal(t, 1, n, "should read one byte")
assert.Equal(t, nil, err, "should be no error")
assert.Equal(t, []byte{'1'}, p, "should have read one byte, '1'")
}
//nolint
func TestRestart(t *testing.T) {
reset()
p := make([]byte, 4)
r1.Read(p)
r1.Restart()
p = make([]byte, 5)
n, err := r1.Read(p)
assert.Equal(t, []byte("12345"), p, "should read the first 5 bytes again")
assert.Equal(t, 5, n, "should have read 4 bytes")
assert.Equal(t, nil, err, "err should be nil")
r1.Restart()
p = make([]byte, 4)
n, err = r1.Read(p)
assert.Equal(t, []byte("1234"), p, "should read the first 4 bytes again")
assert.Equal(t, 4, n, "should have read 4 bytes")
assert.Equal(t, nil, err, "err should be nil")
}