bakaid commented on a change in pull request #596: MINIFICPP-925 - Fix TailFile 
hang on long lines
URL: https://github.com/apache/nifi-minifi-cpp/pull/596#discussion_r297579560
 
 

 ##########
 File path: libminifi/test/unit/StringUtilsTests.cpp
 ##########
 @@ -93,3 +93,49 @@ TEST_CASE("TestStringUtils::testEnv5", "[test split 
classname]") {
 
   REQUIRE(expected == StringUtils::replaceEnvironmentVariables(test_string));
 }
+
+TEST_CASE("TestStringUtils::testHexEncode", "[test hex encode]") {
+  REQUIRE("" == StringUtils::to_hex(""));
+  REQUIRE("6f" == StringUtils::to_hex("o"));
+  REQUIRE("666f6f626172" == StringUtils::to_hex("foobar"));
+  REQUIRE("000102030405060708090a0b0c0d0e0f" == StringUtils::to_hex({0x00, 
0x01, 0x02, 0x03,
+                                                                     0x04, 
0x05, 0x06, 0x07,
+                                                                     0x08, 
0x09, 0x0a, 0x0b,
+                                                                     0x0c, 
0x0d, 0x0e, 0x0f}));
+  REQUIRE("6F" == StringUtils::to_hex("o", true /*uppercase*/));
+  REQUIRE("666F6F626172" == StringUtils::to_hex("foobar", true /*uppercase*/));
+  REQUIRE("000102030405060708090A0B0C0D0E0F" == StringUtils::to_hex({0x00, 
0x01, 0x02, 0x03,
+                                                                     0x04, 
0x05, 0x06, 0x07,
+                                                                     0x08, 
0x09, 0x0a, 0x0b,
+                                                                     0x0c, 
0x0d, 0x0e, 0x0f}, true /*uppercase*/));
+}
+
+TEST_CASE("TestStringUtils::testHexDecode", "[test hex decode]") {
+  REQUIRE("" == StringUtils::from_hex(""));
+  REQUIRE("o" == StringUtils::from_hex("6f"));
+  REQUIRE("o" == StringUtils::from_hex("6F"));
+  REQUIRE("foobar" == StringUtils::from_hex("666f6f626172"));
+  REQUIRE("foobar" == StringUtils::from_hex("666F6F626172"));
+  REQUIRE("foobar" == StringUtils::from_hex("66:6F:6F:62:61:72"));
+  REQUIRE("foobar" == StringUtils::from_hex("66 6F 6F 62 61 72"));
+  REQUIRE(std::string({0x00, 0x01, 0x02, 0x03,
+                       0x04, 0x05, 0x06, 0x07,
+                       0x08, 0x09, 0x0a, 0x0b,
+                       0x0c, 0x0d, 0x0e, 0x0f}) == 
StringUtils::from_hex("000102030405060708090a0b0c0d0e0f"));
+  REQUIRE(std::string({0x00, 0x01, 0x02, 0x03,
+                       0x04, 0x05, 0x06, 0x07,
+                       0x08, 0x09, 0x0a, 0x0b,
+                       0x0c, 0x0d, 0x0e, 0x0f}) == 
StringUtils::from_hex("000102030405060708090A0B0C0D0E0F"));
+  try {
+    StringUtils::from_hex("666f6f62617");
 
 Review comment:
   Thank you!

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