added test case for the maximum extended Rcode

git-svn-id: svn://bind10.isc.org/svn/bind10/trunk@1061 e5f2f494-b856-4b98-b285-d166d9295462

src/lib/dns/cpp/tests/message_unittest.cc

@@ -14,6 +14,8 @@
 
 // $Id$
 
+#include <exceptions/exceptions.h>
+
 #include <dns/buffer.h>
 #include <dns/message.h>
 #include <dns/messagerenderer.h>
@@ -57,6 +59,25 @@ MessageTest::factoryFromFile(Message& message, const char* datafile)
     message.fromWire(buffer);
 }
 
+TEST_F(MessageTest, RcodeConstruct)
+{
+    // normal cases
+    EXPECT_EQ(0, Rcode(0).getCode());
+    EXPECT_EQ(0xfff, Rcode(0xfff).getCode()); // possible max code
+
+    // should fail on attempt of construction with an out of range code
+    EXPECT_THROW(Rcode(0x1000), isc::OutOfRange);
+    EXPECT_THROW(Rcode(0xffff), isc::OutOfRange);
+}
+
+TEST_F(MessageTest, RcodeToText)
+{
+    EXPECT_EQ("NOERROR", Rcode::NOERROR().toText());
+    EXPECT_EQ("BADVERS", Rcode::BADVERS().toText());
+    EXPECT_EQ("17", Rcode(Rcode::BADVERS().getCode() + 1).toText());
+    EXPECT_EQ("4095", Rcode(Rcode(0xfff)).toText());
+}
+
 TEST_F(MessageTest, fromWire)
 {
     factoryFromFile(message, "testdata/message_fromWire1");
@@ -125,6 +146,18 @@ TEST_F(MessageTest, EDNS0UDPSize)
     EXPECT_EQ(Message::DEFAULT_MAX_UDPSIZE, message.getUDPSize());
 }
 
+TEST_F(MessageTest, EDNS0ExtCode)
+{
+    // Extended Rcode = BADVERS
+    factoryFromFile(message, "testdata/message_fromWire10");
+    EXPECT_EQ(Rcode::BADVERS(), message.getRcode());
+
+    // Maximum extended Rcode
+    message.clear();
+    factoryFromFile(message, "testdata/message_fromWire11");
+    EXPECT_EQ(0xfff, message.getRcode().getCode());
+}
+
 TEST_F(MessageTest, BadEDNS0)
 {
     // OPT RR in the answer section