Added padding functionality

Src/StringTools.cpp

@@ -95,7 +95,6 @@ std::string StringTools::Upper(const std::string& str) {
 
 std::vector<std::string> StringTools::Split(const std::string& str, const std::string& seperator) {
     std::vector<std::string> toRet;
-    
     // Quick-accept: str length is 0
     if (str.length() == 0)
       toRet.push_back("");
@@ -132,3 +131,25 @@ std::vector<std::string> StringTools::Split(const std::string& str, const std::s
 
     return toRet;
 }
+
+std::string StringTools::PadLeft(const std::string& str, const char pad, const std::size_t len) {
+  std::stringstream ss;
+
+  for (std::size_t i = str.length(); i < len; i++)
+    ss << pad;
+
+  ss << str;
+
+  return ss.str();
+}
+
+std::string StringTools::PadRight(const std::string& str, const char pad, const std::size_t len) {
+  std::stringstream ss;
+
+  ss << str;
+
+  for (std::size_t i = str.length(); i < len; i++)
+    ss << pad;
+
+  return ss.str();
+}

Src/StringTools.h

@@ -29,6 +29,12 @@ public:
   //! Will split a string by a string seperator
   static std::vector<std::string> Split(const std::string& str, const std::string& seperator);
 
+  //! Will pad a string to the left to length l 
+  static std::string PadLeft(const std::string& str, const char pad, const std::size_t len);
+
+  //! Will pad a string to the right to length l 
+  static std::string PadRight(const std::string& str, const char pad, const std::size_t len);
+
 private:
   // No instanciation! >:(
   StringTools();

Test/CMakeLists.txt

@@ -16,6 +16,7 @@ add_executable(Test
         String__Replace_Char.cpp
         String__Replace_String.cpp
         String__Split.cpp
+        String__PadLeft.cpp
 
         # CharTools-Tests
         Char__IsVowel.cpp

Test/String__PadLeft.cpp

@@ -0,0 +1,44 @@
+#include <StringTools.h>
+#include "Catch2.h"
+
+// Tests that padding to a length shorter adds no padding 
+TEST_CASE(__FILE__"/PadToShorterLength", "[Strings][PadLeft]")
+{
+    // Setup
+    const std::string in = "hello";
+
+    // Exercise
+    const std::string out = StringTools::PadLeft(in, '0', 3);
+
+    // Verify
+    REQUIRE(out == "hello");
+    return;
+}
+
+// Tests that padding to a length equal adds no padding 
+TEST_CASE(__FILE__"/PadToEqualLength", "[Strings][PadLeft]")
+{
+  // Setup
+  const std::string in = "hello";
+
+  // Exercise
+  const std::string out = StringTools::PadLeft(in, '0', 5);
+
+  // Verify
+  REQUIRE(out == "hello");
+  return;
+}
+
+// Tests that adding padding works
+TEST_CASE(__FILE__"/Padding", "[Strings][PadLeft]")
+{
+    // Setup
+    const std::string in = "hello";
+
+    // Exercise
+    const std::string out = StringTools::PadLeft(in, '0', 7);
+
+    // Verify
+    REQUIRE(out == "00hello");
+    return;
+}

Test/String__PadRight.cpp

@@ -0,0 +1,44 @@
+#include <StringTools.h>
+#include "Catch2.h"
+
+// Tests that padding to a length shorter adds no padding 
+TEST_CASE(__FILE__"/PadToShorterLength", "[Strings][PadRight]")
+{
+    // Setup
+    const std::string in = "hello";
+
+    // Exercise
+    const std::string out = StringTools::PadRight(in, '0', 3);
+
+    // Verify
+    REQUIRE(out == "hello");
+    return;
+}
+
+// Tests that padding to a length equal adds no padding 
+TEST_CASE(__FILE__"/PadToEqualLength", "[Strings][PadRight]")
+{
+  // Setup
+  const std::string in = "hello";
+
+  // Exercise
+  const std::string out = StringTools::PadRight(in, '0', 5);
+
+  // Verify
+  REQUIRE(out == "hello");
+  return;
+}
+
+// Tests that adding padding works
+TEST_CASE(__FILE__"/Padding", "[Strings][PadRight]")
+{
+    // Setup
+    const std::string in = "hello";
+
+    // Exercise
+    const std::string out = StringTools::PadRight(in, '0', 7);
+
+    // Verify
+    REQUIRE(out == "hello00");
+    return;
+}