1 files changed, 83 insertions, 0 deletions
diff --git a/src/jaegertracing/thrift/lib/java/test/org/apache/thrift/protocol/TestTProtocolUtil.java b/src/jaegertracing/thrift/lib/java/test/org/apache/thrift/protocol/TestTProtocolUtil.java
new file mode 100644
index 000000000..89cf5366e
--- /dev/null
+++ b/src/jaegertracing/thrift/lib/java/test/org/apache/thrift/protocol/TestTProtocolUtil.java
@@ -0,0 +1,83 @@
+/*
+ * 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.protocol;
+
+import junit.framework.TestCase;
+
+import org.apache.thrift.TSerializer;
+
+import thrift.test.GuessProtocolStruct;
+
+public class TestTProtocolUtil extends TestCase {
+
+  public void testGuessProtocolFactory_JSON() throws Exception {
+
+    byte[] data = "{foo}".getBytes();
+    TProtocolFactory factory = TProtocolUtil.guessProtocolFactory(data, new TCompactProtocol.Factory());
+    assertTrue(factory instanceof TJSONProtocol.Factory);
+
+    // Make sure data serialized with TCompact and which starts with '{'
+    // is not mistakenly guessed as serialized with JSON.
+
+    GuessProtocolStruct s = new GuessProtocolStruct();
+    s.putToMap_field("}","}");
+    byte[] ser = new TSerializer(new TCompactProtocol.Factory()).serialize(s);
+    factory = TProtocolUtil.guessProtocolFactory(ser, new TCompactProtocol.Factory());
+    assertFalse(factory instanceof TJSONProtocol.Factory);
+  }
+
+  public void testGuessProtocolFactory_Binary() throws Exception {
+    // Check that a last byte != 0 is correctly reported as Binary
+
+    byte[] buf = new byte[1];
+    for (int i = 1; i < 256; i++) {
+      buf[0] = (byte) i;
+      TProtocolFactory factory = TProtocolUtil.guessProtocolFactory(buf, new TCompactProtocol.Factory());
+      assertTrue(factory instanceof TBinaryProtocol.Factory);
+    }
+
+    // Check that a second byte set to 0 is reported as Binary
+    buf = new byte[2];
+    TProtocolFactory factory = TProtocolUtil.guessProtocolFactory(buf, new TCompactProtocol.Factory());
+    assertTrue(factory instanceof TBinaryProtocol.Factory);
+  }
+
+  public void testGuessProtocolFactory_Compact() throws Exception {
+    // Check that a first byte > 0x10 is reported as Compact
+    byte[] buf = new byte[3];
+    buf[0] = 0x11; 
+    TProtocolFactory factory = TProtocolUtil.guessProtocolFactory(buf, new TBinaryProtocol.Factory());
+    assertTrue(factory instanceof TCompactProtocol.Factory);
+
+    // Check that second byte >= 0x80 is reported as Compact
+    buf[0] = 0;
+    for (int i = 0x80; i < 0x100; i++) {
+      buf[1] = (byte) i;
+      factory = TProtocolUtil.guessProtocolFactory(buf, new TBinaryProtocol.Factory());
+      assertTrue(factory instanceof TCompactProtocol.Factory);
+    }
+  }
+
+  public void testGuessProtocolFactory_Undecided() throws Exception {
+    byte[] buf = new byte[3];
+    buf[1] = 0x7e;
+    TProtocolFactory factory = TProtocolUtil.guessProtocolFactory(buf, new TSimpleJSONProtocol.Factory());
+    assertTrue(factory instanceof TSimpleJSONProtocol.Factory);
+  }
+}