Add basic bootstrapping test, make BridgeTest optional.

.run/BridgeTest.run.xml

+<component name="ProjectRunConfigurationManager">
+	<configuration default="false" name="BridgeTest" type="GradleRunConfiguration"
+		factoryName="Gradle">
+		<ExternalSystemSettings>
+			<option name="env">
+				<map>
+					<entry key="OPTIONAL_TESTS" value="org.briarproject.onionwrapper.BridgeTest" />
+				</map>
+			</option>
+			<option name="executionName" />
+			<option name="externalProjectPath" value="$PROJECT_DIR$" />
+			<option name="externalSystemIdString" value="GRADLE" />
+			<option name="scriptParameters" value="" />
+			<option name="taskDescriptions">
+				<list />
+			</option>
+			<option name="taskNames">
+				<list>
+					<option value=":onionwrapper-java:test" />
+					<option value="--tests" />
+					<option value="&quot;org.briarproject.onionwrapper.BridgeTest&quot;" />
+				</list>
+			</option>
+			<option name="vmOptions" />
+		</ExternalSystemSettings>
+		<ExternalSystemDebugServerProcess>false</ExternalSystemDebugServerProcess>
+		<ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
+		<DebugAllEnabled>false</DebugAllEnabled>
+		<method v="2" />
+	</configuration>
+</component>
\ No newline at end of file

onionwrapper-core/src/test/java/org/briarproject/onionwrapper/TestUtils.java

@@ -9,6 +9,7 @@ import java.util.logging.Logger;
 import javax.annotation.Nullable;
 import javax.annotation.concurrent.ThreadSafe;
 
+import static java.util.Arrays.asList;
 import static java.util.logging.Level.WARNING;
 import static java.util.logging.Logger.getLogger;
 
@@ -67,4 +68,10 @@ public class TestUtils {
 		else if (arch.equals("arm")) return "armhf";
 		return null;
 	}
+
+	public static boolean isOptionalTestEnabled(Class<?> testClass) {
+		String optionalTests = System.getenv("OPTIONAL_TESTS");
+		return optionalTests != null &&
+				asList(optionalTests.split(",")).contains(testClass.getName());
+	}
 }

onionwrapper-java/src/test/java/org/briarproject/onionwrapper/BootstrapTest.java

+package org.briarproject.onionwrapper;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.io.File;
+import java.util.concurrent.ExecutorService;
+import java.util.logging.Logger;
+
+import static java.util.concurrent.Executors.newCachedThreadPool;
+import static java.util.concurrent.TimeUnit.MINUTES;
+import static java.util.logging.Logger.getLogger;
+import static org.briarproject.nullsafety.NullSafety.requireNonNull;
+import static org.briarproject.onionwrapper.TestUtils.deleteTestDirectory;
+import static org.briarproject.onionwrapper.TestUtils.getArchitectureForTorBinary;
+import static org.briarproject.onionwrapper.TestUtils.getTestDirectory;
+import static org.briarproject.onionwrapper.TestUtils.isLinux;
+import static org.briarproject.onionwrapper.TorWrapper.TorState.CONNECTED;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assume.assumeNotNull;
+import static org.junit.Assume.assumeTrue;
+
+public class BootstrapTest extends BaseTest {
+
+	private final static Logger LOG = getLogger(BootstrapTest.class.getName());
+
+	private static final int SOCKS_PORT = 59060;
+	private static final int CONTROL_PORT = 59061;
+	private final static long TIMEOUT = MINUTES.toMillis(2);
+
+	private final ExecutorService executor = newCachedThreadPool();
+	private final File torDir = getTestDirectory();
+
+	@Before
+	public void setUp() {
+		assumeTrue(isLinux());
+		assumeNotNull(getArchitectureForTorBinary());
+	}
+
+	@After
+	public void tearDown() {
+		deleteTestDirectory(torDir);
+		executor.shutdown();
+	}
+
+	@Test
+	public void testBootstrapping() throws Exception {
+		String architecture = requireNonNull(getArchitectureForTorBinary());
+		TorWrapper tor = new UnixTorWrapper(executor, executor, architecture, torDir,
+				CONTROL_PORT, SOCKS_PORT);
+
+		boolean connected;
+		try {
+			tor.start();
+			tor.enableNetwork(true);
+			long start = System.currentTimeMillis();
+			while (System.currentTimeMillis() - start < TIMEOUT) {
+				if (tor.getTorState() == CONNECTED) break;
+				//noinspection BusyWait
+				Thread.sleep(500);
+			}
+			connected = tor.getTorState() == CONNECTED;
+			if (connected) LOG.info("Connected to Tor");
+			else LOG.warning("Could not connect to Tor within timeout");
+		} finally {
+			tor.stop();
+		}
+		assertTrue(connected);
+	}
+}

onionwrapper-java/src/test/java/org/briarproject/onionwrapper/BridgeTest.java

@@ -33,6 +33,7 @@ import static org.briarproject.onionwrapper.TestUtils.deleteTestDirectory;
 import static org.briarproject.onionwrapper.TestUtils.getArchitectureForTorBinary;
 import static org.briarproject.onionwrapper.TestUtils.getTestDirectory;
 import static org.briarproject.onionwrapper.TestUtils.isLinux;
+import static org.briarproject.onionwrapper.TestUtils.isOptionalTestEnabled;
 import static org.briarproject.onionwrapper.TorWrapper.TorState.CONNECTED;
 import static org.junit.Assert.fail;
 import static org.junit.Assume.assumeNotNull;
@@ -92,6 +93,7 @@ public class BridgeTest extends BaseTest {
 
 	@Before
 	public void setUp() {
+		assumeTrue(isOptionalTestEnabled(BridgeTest.class));
 		assumeTrue(isLinux());
 		assumeNotNull(getArchitectureForTorBinary());
 	}