Improved sequence diagram message comment formatting

tests/t20029/t20029.cc

@@ -12,7 +12,10 @@ template <typename T> class Encoder : public T {
 public:
     bool send(std::string &&msg)
     {
-        return T::send(std::move(encode(std::move(msg))));
+        return T::send(std::move(
+            // Encode the message using Base64 encoding and pass it to the next
+            // layer
+            encode(std::move(msg))));
     }
 
 protected:
@@ -27,6 +30,7 @@ public:
 
         int retryCount = 5;
 
+        // Repeat until send() succeeds or retry count is exceeded
         while (retryCount--) {
             if (T::send(buffer))
                 return true;

tests/test_util.cc

@@ -396,3 +396,24 @@ TEST_CASE("Test tokenize_unexposed_template_parameter", "[unit-test]")
         CHECK(r[i++] == ")");
     }
 }
+
+TEST_CASE("Test format_message_comment", "[unit-test]")
+{
+    using namespace clanguml::util;
+
+    CHECK(format_message_comment("\n\n   ABCD \n", 0) == "\n\n   ABCD \n");
+    CHECK(format_message_comment("\n\n   ABCD \n") == "ABCD");
+
+    CHECK(format_message_comment(
+              "Repeat until send() succeeds or retry count is exceeded") ==
+        "Repeat until send() succeeds\nor retry count is exceeded");
+
+    CHECK(format_message_comment("12345678", 5) == "12345678");
+
+    CHECK(format_message_comment("") == "");
+
+    CHECK(format_message_comment(" ") == "");
+
+    CHECK(format_message_comment("This is a url: http://example.com/test/12345",
+              15) == "This is a url:\nhttp://example.com/test/12345");
+}