test: helper testcase (#791)

- testcase added for helper module for code coverage

Signed-off-by: Guru Mehar Rachaputi <gurumeharrachaputi@gmail.com>

tests/modules/helper/HelperTest.cpp

@@ -11,6 +11,7 @@
 #include <unordered_map>
 #include <vector>
 
+#include "gmock/gmock.h"
 #include "gtest/gtest.h"
 
 using namespace ::testing;
@@ -131,6 +132,15 @@ TEST_F(HelperTest, RegexpStyleStringParse)
     ASSERT_EQ(result.size(), 11);
 }
 
+TEST_F(HelperTest, RegexpStyleStringParseMaxMin)
+{
+    std::string input = "#{6,5}[4-2]test[1-3]";
+
+    const auto result = regexpStyleStringParse(input);
+
+    ASSERT_THAT(result.size(), AllOf(Ge(11),Le(12)));
+}
+
 TEST_F(HelperTest, ReplaceCreditCardSymbols)
 {
     const auto result_default = replaceCreditCardSymbols();