mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-09-20 13:22:19 +02:00
81 lines
1.9 KiB
Go
81 lines
1.9 KiB
Go
// Copyright 2018 The Ebiten Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package audio_test
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import (
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"io"
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"math"
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"testing"
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. "github.com/hajimehoshi/ebiten/audio"
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)
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func TestInfiniteLoop(t *testing.T) {
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indexToByte := func(index int) byte {
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return byte(math.Sin(float64(index)) * 256)
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}
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src := make([]byte, 256)
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for i := range src {
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src[i] = indexToByte(i)
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}
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l := NewInfiniteLoop(BytesReadSeekCloser(src), int64(len(src)))
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buf := make([]byte, len(src)*4)
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if _, err := io.ReadFull(l, buf); err != nil {
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t.Error(err)
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}
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for i, b := range buf {
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got := b
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want := indexToByte(i % len(src))
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if got != want {
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t.Errorf("index: %d, got: %v, want: %v", i, got, want)
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}
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}
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n, err := l.Seek(int64(len(src))*5+128, io.SeekStart)
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if err != nil {
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t.Error(err)
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}
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if want := int64(128); n != want {
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t.Errorf("got: %v, want: %v", n, want)
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}
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n2, err := l.Seek(int64(len(src))*6+64, io.SeekCurrent)
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if err != nil {
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t.Error(err)
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}
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if want := int64(192); n2 != want {
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t.Errorf("got: %v, want: %v", n, want)
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}
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buf2 := make([]byte, len(src)*7)
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if _, err := io.ReadFull(l, buf2); err != nil {
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t.Error(err)
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}
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for i, b := range buf2 {
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got := b
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want := indexToByte((i + 192) % len(src))
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if got != want {
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t.Errorf("index: %d, got: %v, want: %v", i, got, want)
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}
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}
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// Seek to negative position is an error.
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if _, err := l.Seek(-1, io.SeekStart); err == nil {
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t.Errorf("got: %v, want: %v", err, nil)
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}
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}
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