From cfe34088002dc0d1b50845110828b241033b861f Mon Sep 17 00:00:00 2001
From: ParanoidUser <5120290+ParanoidUser@users.noreply.github.com>
Date: Thu, 8 May 2025 03:07:28 +0000
Subject: [PATCH 1/3] docs: kata description

---
 kata/5-kyu/index.md                            | 1 +
 kata/5-kyu/regex-password-validation/README.md | 9 +++++++++
 2 files changed, 10 insertions(+)
 create mode 100644 kata/5-kyu/regex-password-validation/README.md

diff --git a/kata/5-kyu/index.md b/kata/5-kyu/index.md
index 14af678c..3735ad66 100644
--- a/kata/5-kyu/index.md
+++ b/kata/5-kyu/index.md
@@ -38,6 +38,7 @@
 - [Pick peaks](pick-peaks "5279f6fe5ab7f447890006a7")
 - [Primes in numbers](primes-in-numbers "54d512e62a5e54c96200019e")
 - [Product of consecutive Fib numbers](product-of-consecutive-fib-numbers "5541f58a944b85ce6d00006a")
+- [Regex Password Validation](regex-password-validation "52e1476c8147a7547a000811")
 - [RGB To Hex Conversion](rgb-to-hex-conversion "513e08acc600c94f01000001")
 - [Rot13](rot13-1 "530e15517bc88ac656000716")
 - [ROT13](rot13 "52223df9e8f98c7aa7000062")
diff --git a/kata/5-kyu/regex-password-validation/README.md b/kata/5-kyu/regex-password-validation/README.md
new file mode 100644
index 00000000..601837a5
--- /dev/null
+++ b/kata/5-kyu/regex-password-validation/README.md
@@ -0,0 +1,9 @@
+# [Regex Password Validation](https://www.codewars.com/kata/regex-password-validation "https://www.codewars.com/kata/52e1476c8147a7547a000811")
+
+You need to write regex that will validate a password to make sure it meets the following criteria:
+
+* At least six characters long
+* contains a lowercase letter
+* contains an uppercase letter
+* contains a digit
+* only contains alphanumeric characters (note that `'_'` is not alphanumeric)

From d565759391bcd463999994ada089c706166b282a Mon Sep 17 00:00:00 2001
From: "Capt. Cutlass" <5120290+ParanoidUser@users.noreply.github.com>
Date: Wed, 7 May 2025 23:56:45 -0400
Subject: [PATCH 2/3] feat: kata/regex-password-validation

---
 .../5-kyu/regex-password-validation/README.md |  2 +-
 .../main/PasswordRegex.java                   |  3 ++
 .../test/SolutionTest.java                    | 41 +++++++++++++++++++
 3 files changed, 45 insertions(+), 1 deletion(-)
 create mode 100644 kata/5-kyu/regex-password-validation/main/PasswordRegex.java
 create mode 100644 kata/5-kyu/regex-password-validation/test/SolutionTest.java

diff --git a/kata/5-kyu/regex-password-validation/README.md b/kata/5-kyu/regex-password-validation/README.md
index 601837a5..a4cf42be 100644
--- a/kata/5-kyu/regex-password-validation/README.md
+++ b/kata/5-kyu/regex-password-validation/README.md
@@ -6,4 +6,4 @@ You need to write regex that will validate a password to make sure it meets the
 * contains a lowercase letter
 * contains an uppercase letter
 * contains a digit
-* only contains alphanumeric characters (note that `'_'` is not alphanumeric)
+* only contains alphanumeric characters (note that `'_'` is not alphanumeric)
\ No newline at end of file
diff --git a/kata/5-kyu/regex-password-validation/main/PasswordRegex.java b/kata/5-kyu/regex-password-validation/main/PasswordRegex.java
new file mode 100644
index 00000000..11393537
--- /dev/null
+++ b/kata/5-kyu/regex-password-validation/main/PasswordRegex.java
@@ -0,0 +1,3 @@
+interface PasswordRegex {
+  String REGEX = "^(?=.*[a-z])(?=.*[A-Z])(?=.*\\d)[a-zA-Z\\d]{6,}$";
+}
\ No newline at end of file
diff --git a/kata/5-kyu/regex-password-validation/test/SolutionTest.java b/kata/5-kyu/regex-password-validation/test/SolutionTest.java
new file mode 100644
index 00000000..5f91b876
--- /dev/null
+++ b/kata/5-kyu/regex-password-validation/test/SolutionTest.java
@@ -0,0 +1,41 @@
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ValueSource;
+
+class SolutionTest {
+    @ParameterizedTest
+    @ValueSource(strings = {
+        "fjd3IR9",
+        "4fdg5Fj3",
+        "djI38D55",
+        "123abcABC",
+        "ABC123abc",
+        "Password123"
+    })
+    void valid(String password) {
+        assertTrue(password.matches(PasswordRegex.REGEX));
+    }
+
+    @ParameterizedTest
+    @ValueSource(strings = {
+        "ghdfj32",
+        "DSJKHD23",
+        "dsF43",
+        "DHSJdhjsU",
+        "fjd3IR9.;",
+        "fjd3  IR9",
+        "djI3_8D55",
+        "@@",
+        "JHD5FJ53",
+        "!fdjn345",
+        "jfkdfj3j",
+        "123",
+        "abc",
+        ""
+    })
+    void invalid(String password) {
+        assertFalse(password.matches(PasswordRegex.REGEX));
+    }
+}
\ No newline at end of file

From c91a162faaead3e081766570121526c507a94316 Mon Sep 17 00:00:00 2001
From: "Capt. Cutlass" <5120290+ParanoidUser@users.noreply.github.com>
Date: Thu, 8 May 2025 13:18:42 -0400
Subject: [PATCH 3/3] refactor: move constants defined in this interfaces to
 another class or enum.

---
 .../5-kyu/regex-password-validation/main/PasswordRegex.java | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/kata/5-kyu/regex-password-validation/main/PasswordRegex.java b/kata/5-kyu/regex-password-validation/main/PasswordRegex.java
index 11393537..0f2ab068 100644
--- a/kata/5-kyu/regex-password-validation/main/PasswordRegex.java
+++ b/kata/5-kyu/regex-password-validation/main/PasswordRegex.java
@@ -1,3 +1,5 @@
-interface PasswordRegex {
-  String REGEX = "^(?=.*[a-z])(?=.*[A-Z])(?=.*\\d)[a-zA-Z\\d]{6,}$";
+final class PasswordRegex {
+  static final String REGEX = "(?=.*[a-z])(?=.*[A-Z])(?=.*\\d)[a-zA-Z\\d]{6,}";
+
+  private PasswordRegex() {}
 }
\ No newline at end of file