1 /*
2  * Copyright 2022 Google LLC
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.google.android.libraries.mobiledatadownload.file.openers;
17 
18 import static org.junit.Assert.assertThrows;
19 
20 import android.os.Build;
21 import com.google.android.libraries.mobiledatadownload.file.common.UnsupportedFileStorageOperation;
22 import com.google.thirdparty.robolectric.GoogleRobolectricTestRunner;
23 import java.io.File;
24 import java.util.concurrent.atomic.AtomicInteger;
25 import org.junit.Rule;
26 import org.junit.Test;
27 import org.junit.rules.TemporaryFolder;
28 import org.junit.runner.RunWith;
29 import org.robolectric.annotation.Config;
30 
31 /** Basic test to ensure that named pipes are only attempted at compatible sdk levels. */
32 @RunWith(GoogleRobolectricTestRunner.class)
33 public final class PipesTest {
34 
35   @Rule public TemporaryFolder tmpFolder = new TemporaryFolder();
36 
37   private static final String TAG = "PipesTest";
38   private static final AtomicInteger FIFO_COUNTER = new AtomicInteger();
39 
40   @Test
41   @Config(sdk = {Build.VERSION_CODES.KITKAT})
makeFifo_belowLollipop_throwsUnsupportedFileStorageOperation()42   public void makeFifo_belowLollipop_throwsUnsupportedFileStorageOperation() throws Exception {
43     assertThrows(
44         UnsupportedFileStorageOperation.class,
45         () -> Pipes.makeFifo(tmpFolder.newFolder(), TAG, FIFO_COUNTER));
46   }
47 
48   @Test
49   @Config(sdk = {Build.VERSION_CODES.LOLLIPOP})
makeFifo_onLollipop_doesNotThrow()50   public void makeFifo_onLollipop_doesNotThrow() throws Exception {
51     // NOTE: the resultant pipe is invalid because Robolectric doesn't fully support
52     // Os.mkFifo, but we're happy as long as the call succeeds
53     File unusedFifo = Pipes.makeFifo(tmpFolder.newFolder(), TAG, FIFO_COUNTER);
54   }
55 }
56