First draft of timeout test.

Author: sarahchen6

utils/socket-utils/build.gradle

@@ -1,6 +1,10 @@
 apply from: "$rootDir/gradle/java.gradle"
 apply plugin: "idea"
 
+ext {
+  minJavaVersionForTests = JavaVersion.VERSION_17
+}
+
 sourceSets {
   main_java17 {
     java.srcDirs "${project.projectDir}/src/main/java17"

utils/socket-utils/src/test/java17/datadog/common/socket/TunnelingJdkSocketTest.java

@@ -0,0 +1,38 @@
+package datadog.common.socket;
+
+import static org.junit.jupiter.api.Assertions.assertTimeoutPreemptively;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.time.Duration;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+public class TunnelingJdkSocketTest {
+
+  @Test
+  public void testTimeout() throws Exception {
+    Assertions.assertEquals(1 + 1, 3); // should fail
+
+    // create test path
+    Path socketPath = Files.createTempFile("testSocket", null);
+    // create client socket
+    TunnelingJdkSocket clientSocket = createClient(socketPath);
+
+    // attempt to read from empty socket (read should block indefinitely)
+    assertTimeoutPreemptively(Duration.ofSeconds(5), () -> clientSocket.getInputStream().read());
+
+    // clean up
+    clientSocket.close();
+    Files.deleteIfExists(socketPath);
+  }
+
+  private TunnelingJdkSocket createClient(Path socketPath) throws IOException {
+    // create client socket
+    TunnelingJdkSocket clientSocket = new TunnelingJdkSocket(socketPath);
+    // set timeout to one second
+    clientSocket.setSoTimeout(1000);
+    return clientSocket;
+  }
+}