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package s3crypto_test
import (
"bytes"
"fmt"
"testing"
"github.com/aws/aws-sdk-go/service/s3/s3crypto"
)
func padTest(size int, t *testing.T) {
padder := s3crypto.NewPKCS7Padder(size)
for i := 0; i < size; i++ {
input := make([]byte, i)
expected := append(input, bytes.Repeat([]byte{byte(size - i)}, size-i)...)
b, err := padder.Pad(input, len(input))
if err != nil {
t.Fatal("Expected error to be nil but received " + err.Error())
}
if len(b) != len(expected) {
t.Fatal(fmt.Sprintf("Case %d: data is not of the same length", i))
}
if bytes.Compare(b, expected) != 0 {
t.Fatal(fmt.Sprintf("Expected %v but got %v", expected, b))
}
}
}
func unpadTest(size int, t *testing.T) {
padder := s3crypto.NewPKCS7Padder(size)
for i := 0; i < size; i++ {
expected := make([]byte, i)
input := append(expected, bytes.Repeat([]byte{byte(size - i)}, size-i)...)
b, err := padder.Unpad(input)
if err != nil {
t.Fatal("Error received, was expecting nil: " + err.Error())
}
if len(b) != len(expected) {
t.Fatal(fmt.Sprintf("Case %d: data is not of the same length", i))
}
if bytes.Compare(b, expected) != 0 {
t.Fatal(fmt.Sprintf("Expected %v but got %v", expected, b))
}
}
}
func TestPKCS7Padding(t *testing.T) {
padTest(10, t)
padTest(16, t)
padTest(255, t)
}
func TestPKCS7Unpadding(t *testing.T) {
unpadTest(10, t)
unpadTest(16, t)
unpadTest(255, t)
}
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