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// Copyright ©2017 The bíogo Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package itf8
import "testing"
func TestRoundTrip(t *testing.T) {
b := make([]byte, 6)
for i := uint(0); i < 32; i++ {
for off := -1; off <= 1; off++ {
in := int32(1<<i + off)
inn := Encode(b, in)
wantn := Len(in)
if wantn != inn {
t.Errorf("disagreement in number of encoded bytes required: want=%d need=%d", wantn, inn)
}
out, outn, ok := Decode(b)
if !ok {
t.Errorf("failed to decode ITF-8 bytes: %08b", b[:inn])
}
if inn != outn {
t.Errorf("disagreement in number of encoded bytes: in=%d out=%d", inn, outn)
}
if in != out {
t.Errorf("disagreement in encoded value: in=%d (0x%[1]x) out=%d (0x%[2]x)\nencoding=%08b", in, out, b[:inn])
}
}
}
}
func TestKnownValues(t *testing.T) {
tests := []struct {
bytes []byte
want int32
}{
{bytes: []byte{0xff, 0xff, 0xff, 0xff, 0x0f}, want: -1},
{bytes: []byte{0xe0, 0x45, 0x4f, 0x46}, want: 4542278},
}
for _, test := range tests {
got, n, ok := Decode(test.bytes)
if !ok {
t.Errorf("failed to decode ITF-8 bytes: %08b", test.bytes)
}
if n != len(test.bytes) {
t.Errorf("disagreement in expected number of encoded bytes: n=%d len(b)=%d", n, len(test.bytes))
}
if got != test.want {
t.Errorf("disagreement in encoded value: got=%d want=%d (0x%[2]x)", got, test.want)
}
}
}
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