| // Copyright 2015 The Bazel Authors. All Rights Reserved. |
| // |
| // 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.testing.junit.runner.testbed; |
| |
| import com.google.common.io.ByteStreams; |
| import com.google.common.io.Files; |
| |
| import java.io.File; |
| import java.io.IOException; |
| |
| /** |
| * Utility class to synchronize test bed tests and shell tests using a FIFO file. |
| */ |
| public final class Fifo { |
| private static final String FIFO = System.getProperty("test.fifo"); |
| |
| private Fifo(){} |
| |
| /** |
| * Helper method to help with the synchronization between testbed java test and shell tests. It |
| * will block until data is available on the FIFO |
| */ |
| static void waitUntilDataAvailable() throws IOException { |
| if (FIFO == null) { |
| throw new IllegalStateException("No fifo specified"); |
| } |
| Files.asByteSource(new File(FIFO)).copyTo(ByteStreams.nullOutputStream()); |
| } |
| } |