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diff --git a/src/jaegertracing/thrift/lib/java/test/org/apache/thrift/TestOptionals.java b/src/jaegertracing/thrift/lib/java/test/org/apache/thrift/TestOptionals.java
new file mode 100644
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+++ b/src/jaegertracing/thrift/lib/java/test/org/apache/thrift/TestOptionals.java
@@ -0,0 +1,88 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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 org.apache.thrift;
+
+import junit.framework.TestCase;
+
+import thrift.test.Opt4;
+import thrift.test.Opt30;
+import thrift.test.Opt64;
+import thrift.test.Opt80;
+
+// Exercises the isSet methods using structs from from ManyOptionals.thrift
+public class TestOptionals extends TestCase {
+  public void testEncodingUtils() throws Exception {
+    assertEquals((short)0x8, EncodingUtils.setBit((short)0, 3, true));
+    assertEquals((short)0, EncodingUtils.setBit((short)0x8, 3, false));
+    assertEquals(true, EncodingUtils.testBit((short)0x8, 3));
+    assertEquals(false, EncodingUtils.testBit((short)0x8, 4));
+
+    assertEquals((short)Short.MIN_VALUE, EncodingUtils.setBit((short)0, 15, true));
+    assertEquals((short)0, EncodingUtils.setBit((short)Short.MIN_VALUE, 15, false));
+    assertEquals(true, EncodingUtils.testBit(Short.MIN_VALUE, 15));
+    assertEquals(false, EncodingUtils.testBit(Short.MIN_VALUE, 14));
+  }
+
+  public void testOpt4() throws Exception {
+    Opt4 x = new Opt4();
+    assertEquals(false, x.isSetDef1());
+    x.setDef1(3);
+    assertEquals(true, x.isSetDef1());
+    assertEquals(false, x.isSetDef2());
+
+    Opt4 copy = new Opt4(x);
+    assertEquals(true, copy.isSetDef1());
+    copy.unsetDef1();
+    assertEquals(false, copy.isSetDef1());
+    assertEquals(true, x.isSetDef1());
+  }
+
+  public void testOpt30() throws Exception {
+    Opt30 x = new Opt30();
+    assertEquals(false, x.isSetDef1());
+    x.setDef1(3);
+    assertEquals(true, x.isSetDef1());
+    assertEquals(false, x.isSetDef2());
+  }
+
+  public void testOpt64() throws Exception {
+    Opt64 x = new Opt64();
+    assertEquals(false, x.isSetDef1());
+    x.setDef1(3);
+    assertEquals(true, x.isSetDef1());
+    assertEquals(false, x.isSetDef2());
+    x.setDef64(22);
+    assertEquals(true, x.isSetDef64());
+    assertEquals(false, x.isSetDef63());
+  }
+
+  public void testOpt80() throws Exception {
+    Opt80 x = new Opt80();
+    assertEquals(false, x.isSetDef1());
+    x.setDef1(3);
+    assertEquals(true, x.isSetDef1());
+    assertEquals(false, x.isSetDef2());
+
+    Opt80 copy = new Opt80(x);
+    copy.unsetDef1();
+    assertEquals(false, copy.isSetDef1());
+    assertEquals(true, x.isSetDef1());
+  }
+}