diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 6dccd52..2d17419 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -44,6 +44,7 @@ wdk_add_driver(kf-test WINVER NTDDI_WIN10 STL
     HexTest.cpp
     MapTest.cpp
     Vector.cpp
+    USimpleStringTest.cpp
     ObserverTest.cpp
     EncodingDetectorTest.cpp
     IntrusivePtrTest.cpp
diff --git a/test/USimpleStringTest.cpp b/test/USimpleStringTest.cpp
new file mode 100644
index 0000000..118baba
--- /dev/null
+++ b/test/USimpleStringTest.cpp
@@ -0,0 +1,287 @@
+#include "pch.h"
+#include <kf/USimpleString.h>
+
+SCENARIO("USimpleString::matches")
+{
+    GIVEN("A pattern with '*' wildcard")
+    {
+        WHEN("'*' at the beginning")
+        {
+            kf::USimpleString pattern(L"*.txt");
+            kf::USimpleString matchingStr(L"example.txt");
+            kf::USimpleString matchingStr2(L"other-example123.txt");
+            kf::USimpleString matchingStr3(L"file.doc");
+
+            THEN("example.txt and other-example123.txt match the pattern")
+            {
+                REQUIRE(matchingStr.matches(pattern));
+                REQUIRE(matchingStr2.matches(pattern));
+            }
+
+            THEN("file.doc doesn't match the pattern")
+            {
+                REQUIRE(!matchingStr3.matches(pattern));
+            }
+        }
+
+        WHEN("'*' in the middle")
+        {
+            kf::USimpleString pattern(L"ex*.txt");
+            kf::USimpleString matchingStr(L"example.txt");
+            kf::USimpleString nonMatching(L"other-example123.txt");
+
+            THEN("example.txt matches the pattern ex*.txt")
+            {
+                REQUIRE(matchingStr.matches(pattern));
+            }
+
+            THEN("other-example123.txt doesn't match the pattern ex*.txt")
+            {
+                REQUIRE(!nonMatching.matches(pattern));
+            }
+        }
+
+        WHEN("'*' in the end")
+        {
+            kf::USimpleString pattern(L"example*");
+            kf::USimpleString matchingStr(L"example.txt");
+            kf::USimpleString nonMatching(L"other-example123.txt");
+
+            THEN("example.txt matches the pattern example*")
+            {
+                REQUIRE(matchingStr.matches(pattern));
+            }
+
+            THEN("other-example123.txt doesn't match the pattern example*")
+            {
+                REQUIRE(!nonMatching.matches(pattern));
+            }
+        }
+
+        WHEN("'*' at the beginning, in the middle and in the end")
+        {
+            kf::USimpleString pattern(L"*ex*le*");
+            kf::USimpleString matchingStr(L"example.txt");
+            kf::USimpleString matchingStr2(L"other-example123.txt");
+            kf::USimpleString nonMatching(L"file.csv");
+
+            THEN("example.txt and other-example123.txt match the pattern *ex*le*")
+            {
+                REQUIRE(matchingStr.matches(pattern));
+                REQUIRE(matchingStr2.matches(pattern));
+            }
+
+            THEN("file.csv doesn't match the pattern *ex*le*")
+            {
+                REQUIRE(!nonMatching.matches(pattern));
+            }
+        }
+    }
+
+    GIVEN("A pattern with '?' wildcard")
+    {
+        WHEN("'?' at the beginning")
+        {
+            kf::USimpleString pattern(L"?xample.txt");
+            kf::USimpleString matchingStr(L"example.txt");
+            kf::USimpleString nonMatchingStr(L"eeamppe.txt");
+
+            THEN("example.txt matches the pattern ?xample.txt")
+            {
+                REQUIRE(matchingStr.matches(pattern));
+            }
+
+            THEN("eeamppe.txt does not match the pattern ?xample.txt")
+            {
+                REQUIRE(!nonMatchingStr.matches(pattern));
+            }
+        }
+
+        WHEN("'?' in the middle")
+        {
+            kf::USimpleString pattern(L"exa?ple.txt");
+            kf::USimpleString matchingStr(L"example.txt");
+            kf::USimpleString nonMatchingStr(L"eeamppe.txt");
+
+            THEN("example.txt matches the pattern exa?ple.txt")
+            {
+                REQUIRE(matchingStr.matches(pattern));
+            }
+
+            THEN("eeamppe.txt does not match the pattern exa?ple.txt")
+            {
+                REQUIRE(!nonMatchingStr.matches(pattern));
+            }
+        }
+
+        WHEN("'?' in the end")
+        {
+            kf::USimpleString pattern(L"example.tx?");
+            kf::USimpleString matchingStr(L"example.txt");
+            kf::USimpleString nonMatchingStr(L"eeamppe.txt");
+
+            THEN("example.txt matches the pattern example.tx?")
+            {
+                REQUIRE(matchingStr.matches(pattern));
+            }
+
+            THEN("eeamppe.txt does not match the pattern example.tx?")
+            {
+                REQUIRE(!nonMatchingStr.matches(pattern));
+            }
+        }
+    }
+
+    GIVEN("A pattern with mixed '*' and '?' wildcards")
+    {
+        kf::USimpleString pattern (L"?xample*.txt");
+
+        WHEN("The string matches the pattern")
+        {
+            kf::USimpleString matchingStr (L"xxample_123.txt");
+
+            THEN("The string matches the pattern")
+            {
+                REQUIRE(matchingStr.matches(pattern));
+            }
+        }
+
+        WHEN("The string does not match the pattern")
+        {
+            kf::USimpleString str (L"non-example.exe");
+
+            THEN("The string does not match")
+            {
+                REQUIRE(!str.matches(pattern));
+            }
+        }
+    }
+
+    WHEN("Empty pattern and empty string")
+    {
+        kf::USimpleString pattern (L"");
+        kf::USimpleString str (L"");
+
+        THEN("They match")
+        {
+            REQUIRE(str.matches(pattern));
+        }
+    }
+
+    WHEN("Pattern is '*' and string is empty")
+    {
+        kf::USimpleString pattern (L"*");
+        kf::USimpleString str (L"");
+
+        THEN("'*' does not match an empty string")
+        {
+            REQUIRE(!str.matches(pattern));
+        }
+    }
+
+    WHEN("Pattern is empty and string is not")
+    {
+        kf::USimpleString pattern (L"");
+        kf::USimpleString str (L"file.txt");
+
+        THEN("They do not match")
+        {
+            REQUIRE(!str.matches(pattern));
+        }
+    }
+
+    WHEN("The string has different case")
+    {
+        kf::USimpleString pattern (L"example.txt");
+
+        kf::USimpleString str1 (L"Example.txt");
+        kf::USimpleString str2 (L"EXAMPLE.TXT");
+        kf::USimpleString str3 (L"eXample.TxT");
+
+        THEN("They do not match")
+        {
+            REQUIRE(!str1.matches(pattern));
+            REQUIRE(!str2.matches(pattern));
+            REQUIRE(!str3.matches(pattern));
+        }
+    }
+}
+
+SCENARIO("USimpleString::matchesIgnoreCase")
+{
+    GIVEN("A pattern with '*' wildcard")
+    {
+        kf::USimpleString pattern(L"*.TXT");
+
+        kf::USimpleString matchingStr (L"EXAMPLE.TXT");
+        kf::USimpleString matchingStr2 (L"Example.txt");
+        kf::USimpleString matchingStr3 (L"example.txt");
+        kf::USimpleString nonMatchingStr (L"NoN-matching.ExE");
+
+        THEN("EXAMPLE.TXT, Example.txt, example.txt match the pattern *.txt")
+        {
+            REQUIRE(matchingStr.matchesIgnoreCase(pattern));
+            REQUIRE(matchingStr2.matchesIgnoreCase(pattern));
+            REQUIRE(matchingStr3.matchesIgnoreCase(pattern));
+        }
+
+        THEN("NoN-matching.ExE does not match *.txt")
+        {
+            REQUIRE(!nonMatchingStr.matchesIgnoreCase(pattern));
+        }
+    }
+
+    GIVEN("A pattern with '?' wildcard")
+    {
+        kf::USimpleString pattern (L"E?AMP?E.TXT");
+
+        kf::USimpleString matchingStr (L"EXAMPLE.txt");
+        kf::USimpleString matchingStr2 (L"eeamppe.txt");
+        kf::USimpleString matchingStr3 (L"eXampLe.TXT");
+        kf::USimpleString nonMatchingStr (L"Example.EXE");
+
+        THEN("EXAMPLE.txt, eeamppe.txt, eXampLe.TXT match the pattern e?amp?e.txt")
+        {
+            REQUIRE(matchingStr.matchesIgnoreCase(pattern));
+            REQUIRE(matchingStr2.matchesIgnoreCase(pattern));
+            REQUIRE(matchingStr3.matchesIgnoreCase(pattern));
+        }
+
+        THEN("Example.EXE does not match e?amp?e.txt")
+        {
+            REQUIRE(!nonMatchingStr.matchesIgnoreCase(pattern));
+        }
+    }
+
+    GIVEN("A pattern with mixed '*' and '?' wildcards")
+    {
+        kf::USimpleString pattern (L"?XAMPLE*.TXT");
+        kf::USimpleString matchingStr (L"xxample_123.txt");
+        kf::USimpleString matchingStr2 (L"xxAMPle_123.TXT");
+        kf::USimpleString str (L"NoN-Example.exe");
+
+        THEN("xxample_123.txt, xxAMPle_123.TXT match the pattern ?xample*.txt")
+        {
+            REQUIRE(matchingStr.matchesIgnoreCase(pattern));
+            REQUIRE(matchingStr2.matchesIgnoreCase(pattern));
+        }
+
+        THEN("NoN-Example.exe does not match the pattern ?xample*.txt")
+        {
+            REQUIRE(!str.matchesIgnoreCase(pattern));
+        }
+    }
+
+    WHEN("Pattern is empty and string is not")
+    {
+        kf::USimpleString pattern (L"");
+        kf::USimpleString str (L"file.txt");
+        kf::USimpleString str2 (L"FILE.TXT");
+
+        THEN("They do not match")
+        {
+            REQUIRE(!str.matchesIgnoreCase(pattern));
+            REQUIRE(!str2.matchesIgnoreCase(pattern));
+        }
+    }
+}