diff --git a/testutils/src/main/java/com/google/android/exoplayer2/testutil/FakeShuffleOrder.java b/testutils/src/main/java/com/google/android/exoplayer2/testutil/FakeShuffleOrder.java new file mode 100644 index 0000000000..0664f47023 --- /dev/null +++ b/testutils/src/main/java/com/google/android/exoplayer2/testutil/FakeShuffleOrder.java @@ -0,0 +1,68 @@ +/* + * Copyright (C) 2017 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package com.google.android.exoplayer2.testutil; + +import com.google.android.exoplayer2.C; +import com.google.android.exoplayer2.source.ShuffleOrder; + +/** + * Fake {@link ShuffleOrder} which returns a reverse order. This order is thus deterministic but + * different from the original order. + */ +public final class FakeShuffleOrder implements ShuffleOrder { + + private final int length; + + public FakeShuffleOrder(int length) { + this.length = length; + } + + @Override + public int getLength() { + return length; + } + + @Override + public int getNextIndex(int index) { + return index > 0 ? index - 1 : C.INDEX_UNSET; + } + + @Override + public int getPreviousIndex(int index) { + return index < length - 1 ? index + 1 : C.INDEX_UNSET; + } + + @Override + public int getLastIndex() { + return length > 0 ? 0 : C.INDEX_UNSET; + } + + @Override + public int getFirstIndex() { + return length > 0 ? length - 1 : C.INDEX_UNSET; + } + + @Override + public ShuffleOrder cloneAndInsert(int insertionIndex, int insertionCount) { + return new FakeShuffleOrder(length + insertionCount); + } + + @Override + public ShuffleOrder cloneAndRemove(int removalIndex) { + return new FakeShuffleOrder(length - 1); + } + +}