Test SOCKS4 client: connect with faulty Socket

core/java/test/junit/net/i2p/socks/SOCKS4ClientTest.java

@@ -109,6 +109,28 @@ public class SOCKS4ClientTest {
                 80);
         });
     }
+
+    /**
+     * Run into IOException while trying to connect due to closed input stream
+     */
+    @Test
+    public void connect__ioExceptionWithSocket() {
+        assertThrows(IOException.class, () -> {
+            // Create an IOException by closing input stream before it can used
+            ByteArrayInputStream inputStream = new ByteArrayInputStream(new byte[]{});
+            inputStream.close();
+
+            Socket socket = Mockito.mock(Socket.class);
+            Mockito.when(socket.getInputStream()).thenReturn(inputStream);
+            Mockito.when(socket.getOutputStream()).thenReturn(new ByteArrayOutputStream());
+
+            SOCKS4Client.connect(
+                socket,
+                "127.0.0.1",
+                80
+            );
+        });
+    }
     /**
      * Check that CONNECTION_REFUSED throws exception
      */