8332922: Test java/io/IO/IO.java fails when /usr/bin/expect not exist

Reviewed-by: djelinski

Author: SendaoYan

test/jdk/java/io/IO/IO.java

@@ -29,7 +29,7 @@
 
 import jdk.test.lib.process.OutputAnalyzer;
 import jdk.test.lib.process.ProcessTools;
-import jtreg.SkippedException;
+import org.junit.jupiter.api.Assumptions;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Nested;
 import org.junit.jupiter.api.condition.EnabledOnOs;
@@ -60,7 +60,7 @@ public class OSSpecificTests {
         public static void prepareTTY() {
             expect = Paths.get("/usr/bin/expect"); // os-specific path
             if (!Files.exists(expect) || !Files.isExecutable(expect)) {
-                throw new SkippedException("'" + expect + "' not found");
+                Assumptions.abort("'" + expect + "' not found");
             }
         }