1 /*
2  * Copyright (C) 2016 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package com.android.tradefed.testtype;
17 
18 /**
19  * A {@link IRemoteTest} that can be sharded into separately executable sub-tests. The splitting
20  * into sub-tests is expected to be deterministic and each sub-test should be independent in order
21  * to allow for execution of different shards on different hosts.
22  */
23 public interface IStrictShardableTest extends IRemoteTest {
24 
25     /**
26      * Returns a {@link IRemoteTest} for a single shard. This must be deterministic and always
27      * return the same {@link IRemoteTest} for the same input.
28      *
29      * @param shardCount the number of total shards
30      * @param shardIndex the index of a test shard to return. The value is in range [0, shardCount).
31      * @return a {@link IRemoteTest}
32      */
getTestShard(int shardCount, int shardIndex)33     IRemoteTest getTestShard(int shardCount, int shardIndex);
34 
35 }
36