Accept zero length queries

src/QueryParser.h

@@ -44,7 +44,7 @@ namespace uWS {
             if (statement.length() && statement[0] == key[0]) {
                 /* Equal sign must be present and not in the end of statement */
                 auto equality = statement.find('=');
-                if (equality != std::string_view::npos && equality != statement.length() - 1) {
+                if (/*equality != std::string_view::npos && equality != statement.length() - 1*/ true) {
 
                     std::string_view statementKey = statement.substr(0, equality);
                     std::string_view statementValue = statement.substr(equality + 1);

tests/Makefile

@@ -1,4 +1,6 @@
 default:
+	$(CXX) -std=c++17 -fsanitize=address Query.cpp -o Query
+	./Query
 	$(CXX) -std=c++17 -fsanitize=address ChunkedEncoding.cpp -o ChunkedEncoding
 	./ChunkedEncoding
 	$(CXX) -std=c++17 -fsanitize=address TopicTree.cpp -o TopicTree

tests/Query.cpp

@@ -0,0 +1,20 @@
+#include <iostream>
+#include <cassert>
+
+#include "../src/QueryParser.h"
+
+int main() {
+
+    {
+        std::string buf = "?test1=&test2=someValue";
+        assert(uWS::getDecodedQueryValue("test2", (char *) buf.data()) == "someValue");
+    }
+
+    {
+        std::string buf = "?test1=&test2=someValue";
+        assert(uWS::getDecodedQueryValue("test1", (char *) buf.data()) == "");
+        assert(uWS::getDecodedQueryValue("test2", (char *) buf.data()) == "someValue");
+    }
+
+    return 0;
+}