IGMPv3 tests: Move truncated example from inlined array to a hex resource file.

Tests/Packet++Test/PacketExamples/igmpv3_report_truncated.dat

@@ -0,0 +1 @@
+01005e00001600000000000108004500002000000000010200000a000001e0000016220000000000000101000001

Tests/Packet++Test/Tests/IgmpTests.cpp

@@ -153,18 +153,12 @@ PTF_TEST_CASE(Igmpv3ParsingTest)
 	// Only the start of a record was checked against the layer, so a truncated one was returned
 	// and its fields were then read past the end of the buffer.
 	{
-		uint8_t truncated[] = { // Ethernet
-			                    0x01, 0x00, 0x5e, 0x00, 0x00, 0x16, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x08, 0x00,
-			                    // IPv4, total length 32, protocol 2 (IGMP)
-			                    0x45, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x00, 0x00, 0x0a, 0x00,
-			                    0x00, 0x01, 0xe0, 0x00, 0x00, 0x16,
-			                    // IGMPv3 report: 8 byte header claiming one group record, then only 4 bytes of it
-			                    0x22, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01
-		};
-
-		timeval truncatedTime = {};
-		pcpp::RawPacket truncatedRawPacket(truncated, sizeof(truncated), truncatedTime, false, pcpp::LINKTYPE_ETHERNET);
-		pcpp::Packet truncatedPacket(&truncatedRawPacket);
+		// Packet contents
+		// Ethernet
+		// IPv4, total length 32, protocol 2 (IGMP)
+		// IGMPv3 report: 8 byte header claiming one group record, then only 4 bytes of it
+		auto truncatedRawPacket = createPacketFromHexResource("PacketExamples/igmpv3_report_truncated.dat");
+		pcpp::Packet truncatedPacket(truncatedRawPacket.get());
 
 		auto truncatedReportLayer = truncatedPacket.getLayerOfType<pcpp::IgmpV3ReportLayer>();
 		PTF_ASSERT_NOT_NULL(truncatedReportLayer);

Tests/PcppTestUtilities/Resources.cpp

@@ -104,7 +104,7 @@ namespace pcpp_tests
 		}
 
 		void ResourceProvider::saveResource(ResourceType resourceType, const char* filename, const uint8_t* data,
-		                                    size_t length) const
+		                                    size_t length)
 		{
 			if (m_Frozen)
 			{

Tests/PcppTestUtilities/Resources.h

@@ -32,6 +32,18 @@ namespace pcpp_tests
 			/// @param frozen If true, the provider is read-only and does not allow saving resources.
 			explicit ResourceProvider(std::string dataRoot, bool frozen = true);
 
+			/// @brief Freezes the provider, preventing any modifications or saving of resources.
+			void freeze()
+			{
+				m_Frozen = true;
+			}
+
+			/// @brief Allows the provider to be modified, enabling saving of resources.
+			void unfreeze()
+			{
+				m_Frozen = false;
+			}
+
 			/// @brief Loads a resource from resource provider.
 			/// @param filename The name of the resource file to load.
 			/// @param resourceType The type of the loaded resource. Determines how the resource is processed.
@@ -50,8 +62,7 @@ namespace pcpp_tests
 			/// @param data Pointer to the data to be saved.
 			/// @param length The length of the data in bytes.
 			/// @throw std::runtime_error if the provider is frozen and does not allow saving.
-			void saveResource(ResourceType resourceType, const char* filename, const uint8_t* data,
-			                  size_t length) const;
+			void saveResource(ResourceType resourceType, const char* filename, const uint8_t* data, size_t length);
 
 		private:
 			std::string m_DataRoot;  ///< The root directory for test data files