From 2676bb112efbc5da99f9a1176f01d7d56df54014 Mon Sep 17 00:00:00 2001
From: Brandon Johnson <brandon@moov.io>
Date: Sun, 24 Jul 2022 00:55:07 -0600
Subject: [PATCH] add tests/Strings, change String to Strings, code style
 updates

---
 DIRECTORY.md                                  | 102 +++++++++---------
 String/CountSentences.php                     |  23 ----
 String/CountVowelsConsonantNumber.php         |  49 ---------
 String/ReverseWords.php                       |  12 ---
 {String => Strings}/CheckAnagram.php          |  16 ++-
 {String => Strings}/CheckPalindrome.php       |  21 +++-
 .../CheckPalindrome2.php                      |  19 ++--
 Strings/CountConsonants.php                   |  31 ++++++
 Strings/CountSentences.php                    |  15 +++
 {String => Strings}/CountVowels.php           |  38 +++----
 .../EditDistance.php => Strings/Distance.php  |  11 +-
 {String => Strings}/MaxCharacter.php          |   6 +-
 {String => Strings}/ReverseString.php         |   8 +-
 Strings/ReverseWords.php                      |  22 ++++
 tests/StringTest.php                          |  78 --------------
 tests/Strings/StringsTest.php                 | 102 ++++++++++++++++++
 16 files changed, 297 insertions(+), 256 deletions(-)
 delete mode 100644 String/CountSentences.php
 delete mode 100644 String/CountVowelsConsonantNumber.php
 delete mode 100644 String/ReverseWords.php
 rename {String => Strings}/CheckAnagram.php (54%)
 rename {String => Strings}/CheckPalindrome.php (56%)
 rename String/CheckPalindromeString.php => Strings/CheckPalindrome2.php (76%)
 create mode 100644 Strings/CountConsonants.php
 create mode 100644 Strings/CountSentences.php
 rename {String => Strings}/CountVowels.php (55%)
 rename String/EditDistance.php => Strings/Distance.php (94%)
 rename {String => Strings}/MaxCharacter.php (91%)
 rename {String => Strings}/ReverseString.php (67%)
 create mode 100644 Strings/ReverseWords.php
 delete mode 100644 tests/StringTest.php
 create mode 100644 tests/Strings/StringsTest.php

diff --git a/DIRECTORY.md b/DIRECTORY.md
index ca65407..7e3c623 100644
--- a/DIRECTORY.md
+++ b/DIRECTORY.md
@@ -1,10 +1,10 @@
 # List of all files
 
 ## Ciphers
-  * [Caesarcipher](./ciphers/caesarCipher.php)
-  * [Monoalphabeticcipher](./ciphers/monoAlphabeticCipher.php)
-  * [Morsecode](./ciphers/morseCode.php)
-  * [Xorcipher](./ciphers/XORCipher.php)
+  * [Caesarcipher](./Ciphers/CaesarCipher.php)
+  * [Monoalphabeticcipher](./Ciphers/monoAlphabeticCipher.php)
+  * [Morsecode](./Ciphers/MorseCode.php)
+  * [Xorcipher](./Ciphers/XORCipher.php)
 
 ## Conversions
   * [Binarytodecimal](./Conversions/BinaryToDecimal.php)
@@ -21,58 +21,64 @@
   * [Fibonacci](./Maths/Fibonacci.php)
   * [Fibonacci2](./Maths/Fibonacci2.php)
   * [Perfectsquare](./Maths/PerfectSquare.php)
-
-## Projecteuler
-  * [Problem1](./ProjectEuler/Problem1.php)
-  * [Problem2](./ProjectEuler/Problem2.php)
-  * [Problem3](./ProjectEuler/Problem3.php)
-  * [Problem5](./ProjectEuler/Problem5.php)
-  * [Problem6](./ProjectEuler/Problem6.php)
-  * [Problem7](./ProjectEuler/Problem7.php)
-  * [Problem9](./ProjectEuler/Problem9.php)
+  * Projecteuler
+    * [Problem1](./Maths/ProjectEuler/Problem1.php)
+    * [Problem2](./Maths/ProjectEuler/Problem2.php)
+    * [Problem3](./Maths/ProjectEuler/Problem3.php)
+    * [Problem5](./Maths/ProjectEuler/Problem5.php)
+    * [Problem6](./Maths/ProjectEuler/Problem6.php)
+    * [Problem7](./Maths/ProjectEuler/Problem7.php)
+    * [Problem9](./Maths/ProjectEuler/Problem9.php)
 
 ## Searches
-  * [Binary Search](./searches/binary_search.php)
+  * [Binarysearch](./searches/BinarySearch.php)
   * [Fibonaccisearch](./searches/fibonacciSearch.php)
-  * [Linear Search](./searches/linear_search.php)
-  * [Lower Bound](./searches/lower_bound.php)
-  * [Upper Bound](./searches/upper_bound.php)
+  * [Linearsearch](./searches/LinearSearch.php)
+  * [Lowerbound](./searches/LowerBound.php)
+  * [Upperbound](./searches/UpperBound.php)
 
 ## Sorting
   * [Arraykeyssort](./sorting/arrayKeysSort.php)
-  * [Bubblesort](./sorting/bubbleSort.php)
-  * [Bubblesort2](./sorting/bubbleSort2.php)
-  * [Countsort](./sorting/countSort.php)
-  * [Insertionsort](./sorting/insertionSort.php)
-  * [Mergesort](./sorting/mergeSort.php)
-  * [Quicksort](./sorting/quickSort.php)
-  * [Radixsort](./sorting/radixSort.php)
-  * [Selectionsort](./sorting/selectionSort.php)
+  * [Bubblesort](./Sorting/BubbleSort.php)
+  * [Bubblesort2](./Sorting/BubbleSort2.php)
+  * [Countsort](./Sorting/CountSort.php)
+  * [Insertionsort](./Sorting/InsertionSort.php)
+  * [Mergesort](./Sorting/MergeSort.php)
+  * [Quicksort](./Sorting/QuickSort.php)
+  * [Radixsort](./Sorting/RadixSort.php)
+  * [Selectionsort](./Sorting/SelectionSort.php)
 
-## String
-  * [Checkanagram](./String/CheckAnagram.php)
-  * [Checkpalindrome](./String/CheckPalindrome.php)
-  * [Checkpalindromestring](./String/CheckPalindromeString.php)
-  * [Countsentences](./String/CountSentences.php)
-  * [Countvowels](./String/CountVowels.php)
-  * [Countvowelsconsonantnumber](./String/CountVowelsConsonantNumber.php)
-  * [Editdistance](./String/EditDistance.php)
-  * [Maxcharacter](./String/MaxCharacter.php)
-  * [Reversestring](./String/ReverseString.php)
-  * [Reversewords](./String/ReverseWords.php)
+## Strings
+  * [Checkanagram](./Strings/CheckAnagram.php)
+  * [Checkpalindrome](./Strings/CheckPalindrome.php)
+  * [Checkpalindrome2](./Strings/CheckPalindrome2.php)
+  * [Countconsonants](./Strings/CountConsonants.php)
+  * [Countsentences](./Strings/CountSentences.php)
+  * [Countvowels](./Strings/CountVowels.php)
+  * [Distance](./Strings/Distance.php)
+  * [Maxcharacter](./Strings/MaxCharacter.php)
+  * [Reversestring](./Strings/ReverseString.php)
+  * [Reversewords](./Strings/ReverseWords.php)
 
 ## Tests
-  * [Cipherstest](./tests/CiphersTest.php)
-  * [Ciphertest](./tests/CipherTest.php)
-  * [Conversionstest](./tests/ConversionsTest.php)
-  * [Decimaltobinarytest](./tests/DecimalToBinaryTest.php)
-  * [Fibonaccisearchtest](./tests/fibonacciSearchTest.php)
-  * [Mathtest](./tests/MathTest.php)
-  * [Monoalphabeticciphertest](./tests/MonoAlphabeticCipherTest.php)
-  * [Morsecodetest](./tests/MorseCodeTest.php)
-  * [Projecteulertest](./tests/ProjectEulerTest.php)
+  * Ciphers
+    * [Cipherstest](./tests/Ciphers/CiphersTest.php)
+    * [Monoalphabeticciphertest](./tests/Ciphers/MonoAlphabeticCipherTest.php)
+    * [Morsecodetest](./tests/Ciphers/MorseCodeTest.php)
+  * Conversions
+    * [Conversionstest](./tests/Conversions/ConversionsTest.php)
+  * Maths
+    * [Mathstest](./tests/Maths/MathsTest.php)
+    * [Projecteulertest](./tests/Maths/ProjectEulerTest.php)
+  * Searches
+    * [Binarysearchtest](./tests/Searches/BinarySearchTest.php)
+    * [Searchestest](./tests/Searches/SearchesTest.php)
   * Sorting
     * [Arraykeyssorttest](./tests/sorting/arrayKeysSortTest.php)
-    * [Countsorttest](./tests/sorting/countSortTest.php)
-    * [Quicksorttest](./tests/sorting/quickSortTest.php)
-  * [Stringtest](./tests/StringTest.php)
+    * [Sortingtests](./tests/Sorting/SortingTests.php)
+  * Strings
+    * [Stringstest](./tests/Strings/StringsTest.php)
+
+## Utils
+  * [Arrayhelpers](./Utils/ArrayHelpers.php)
+  * [Executiontime](./Utils/ExecutionTime.php)
diff --git a/String/CountSentences.php b/String/CountSentences.php
deleted file mode 100644
index 84f1028..0000000
--- a/String/CountSentences.php
+++ /dev/null
@@ -1,23 +0,0 @@
-<?php
-
-/**
- * This is a simple way to count sentence 
- * using php preg_match_all() function 
- * @param string $sentence
- */
-
-function countSentences(string $sentence): int
-{
-    $sentence = trim($sentence);
-
-    return preg_match_all('/[^\s|^\...](\.|\!|\?)(?!\w)/', $sentence);
-}
-
-
-// example
-echo countSentences("Hi! Hello world."); // returns 2
-echo PHP_EOL;
-echo countSentences("i am testing. test...."); // returns 2
-echo PHP_EOL;
-echo countSentences("How are you?"); // returns 1
-echo PHP_EOL;
diff --git a/String/CountVowelsConsonantNumber.php b/String/CountVowelsConsonantNumber.php
deleted file mode 100644
index eafcd86..0000000
--- a/String/CountVowelsConsonantNumber.php
+++ /dev/null
@@ -1,49 +0,0 @@
-<?php
-
-/**
- * This a simple function returns
- * the Total number of vowels total 
- * number of consonant and total 
- * numeric number present in the
- * given string using a simple
- * method of looping through all
- * characters present in the string
- *
- * @param string $string
- * 
- */
-function countVowelsConsonant(string $string): String
-{
-    if (empty($string)) {
-        throw new \Exception('Please pass a non-empty string value');
-    }
-
-    $vowels     = ['a', 'e', 'i', 'o', 'u']; // Vowels Set
-    $string     = strtolower($string); // For case-insensitive checking
-
-    $vowelCount = 0;
-    $consonantCount = 0;
-    $numberCount = 0;
-
-    for ($i = 0; $i < strlen($string); $i++) {
-
-        if (in_array($string[$i], $vowels)) {
-
-            $vowelCount++;
-        } elseif ($string[$i] >= 'a' && $string[$i] <= 'z') {
-
-            $consonantCount++;
-        } elseif ($string[$i] >= 0 && $string[$i] <= 9 && is_numeric($string[$i])) {
-
-            $numberCount++;
-        }
-    }
-
-    return 'total vowels - ' . $vowelCount . PHP_EOL .
-        'total consonant - ' . $consonantCount . PHP_EOL .
-        'total numeric number -' . $numberCount . PHP_EOL;
-}
-
-// example
-echo countVowelsConsonant('Hello World. 12345');
-echo countVowelsConsonant('Count Vowels, Consonant and numeric number. 09876');
diff --git a/String/ReverseWords.php b/String/ReverseWords.php
deleted file mode 100644
index 4cbe0b4..0000000
--- a/String/ReverseWords.php
+++ /dev/null
@@ -1,12 +0,0 @@
-<?php
-
-function reverse_words(string $text)
-{
-    $text          = trim($text);
-    $words         = explode(' ', $text);
-    $reversedWords = [];
-    for ($i = (count($words) - 1); $i >= 0; $i--) {
-        $reversedWords[] = $words[$i];
-    }
-    return implode(' ', $reversedWords);
-}
diff --git a/String/CheckAnagram.php b/Strings/CheckAnagram.php
similarity index 54%
rename from String/CheckAnagram.php
rename to Strings/CheckAnagram.php
index 021af9e..d36a17d 100644
--- a/String/CheckAnagram.php
+++ b/Strings/CheckAnagram.php
@@ -1,15 +1,23 @@
 <?php
 
+/**
+ * Checks if two strings are anagrams of each other.
+ *
+ * @param string $originalString
+ * @param string $testString
+ * @param bool $caseInsensitive
+ * @return bool
+ */
 function isAnagram(string $originalString, string $testString, bool $caseInsensitive = true)
 {
-    if ($caseInsensitive) 
+    if ($caseInsensitive)
     {
         $originalString = strtolower($originalString); // Converting string to lowercase for case-insensitive check
         $testString = strtolower($testString);
     }
 
-    //count_chars(string, mode = 1) returns key-value pairs with character as key, frequency as value
-    //We can directly compare the arrays in this case
+    // count_chars(string, mode = 1) returns key-value pairs with character as key, frequency as value
+    // We can directly compare the arrays in this case
     if (count_chars($originalString, 1) == count_chars($testString, 1))
     {
         return true;
@@ -18,4 +26,4 @@ function isAnagram(string $originalString, string $testString, bool $caseInsensi
     {
         return false;
     }
-}
\ No newline at end of file
+}
diff --git a/String/CheckPalindrome.php b/Strings/CheckPalindrome.php
similarity index 56%
rename from String/CheckPalindrome.php
rename to Strings/CheckPalindrome.php
index 2e0959d..8fa7e9f 100644
--- a/String/CheckPalindrome.php
+++ b/Strings/CheckPalindrome.php
@@ -1,21 +1,32 @@
 <?php
 
-function is_palindrome(string $string, bool $caseInsensitive = true)
+/**
+ * Checks if a string is a palindrome
+ *
+ * @param string $string
+ * @param bool $caseInsensitive
+ * @return bool
+ */
+function isPalindrome(string $string, bool $caseInsensitive = true)
 {
     $string = trim($string); // Removing leading and trailing spaces
 
-    if (empty($string)) {
+    if (empty($string))
+    {
         return false; // Returning false for an Empty String
     }
 
-    if ($caseInsensitive) {
+    if ($caseInsensitive)
+    {
         $string = strtolower($string); // Converting string to lowercase for case-insensitive check
     }
 
     $characters = str_split($string);
 
-    for ($i = 0; $i < count($characters); $i++) {
-        if ($characters[$i] !== $characters[count($characters) - ($i + 1)]) {
+    for ($i = 0; $i < count($characters); $i++)
+    {
+        if ($characters[$i] !== $characters[count($characters) - ($i + 1)])
+        {
             return false;
         }
     }
diff --git a/String/CheckPalindromeString.php b/Strings/CheckPalindrome2.php
similarity index 76%
rename from String/CheckPalindromeString.php
rename to Strings/CheckPalindrome2.php
index 1614330..0c535d0 100644
--- a/String/CheckPalindromeString.php
+++ b/Strings/CheckPalindrome2.php
@@ -1,12 +1,10 @@
 <?php
 
 /**
- * This is a simple way to check palindrome string 
- * using php strrev() function 
+ * This is a simple way to check palindrome string
+ * using php strrev() function
  * make it simple
- */
-
-/**
+ *
  * @param string $string
  * @param bool $caseInsensitive
  */
@@ -15,19 +13,22 @@ function checkPalindromeString(string $string, bool $caseInsensitive = true): St
     //removing spaces
     $string = trim($string);
 
-    if (empty($string)) {
+    if (empty($string))
+    {
         throw new \Exception('You are given empty string. Please give a non-empty string value');
     }
 
     /**
-     * for case-insensitive 
+     * for case-insensitive
      * lowercase string conversion
      */
-    if ($caseInsensitive) {
+    if ($caseInsensitive)
+    {
         $string = strtolower($string);
     }
 
-    if ($string !== strrev($string)) {
+    if ($string !== strrev($string))
+    {
         return $string . " - not a palindrome string." . PHP_EOL;
     }
 
diff --git a/Strings/CountConsonants.php b/Strings/CountConsonants.php
new file mode 100644
index 0000000..d863792
--- /dev/null
+++ b/Strings/CountConsonants.php
@@ -0,0 +1,31 @@
+<?php
+
+/**
+ * Function returns the total number of consonants present in the given
+ * string using a linear search through the string
+ *
+ * @param string $string
+ * @return int
+ */
+function countConsonants(string $string): Int
+{
+    if (empty($string)) {
+        throw new \Exception('Please pass a non-empty string value');
+    }
+
+    $vowels     = ['a', 'e', 'i', 'o', 'u']; // Vowels Set
+    $string     = strtolower($string); // For case-insensitive checking
+
+    $consonantCount = 0;
+
+    for ($i = 0; $i < strlen($string); $i++)
+    {
+      if (!in_array($string[$i], $vowels) &&
+        $string[$i] >= 'a' && $string[$i] <= 'z')
+        {
+            $consonantCount++;
+        }
+    }
+
+    return $consonantCount;
+}
diff --git a/Strings/CountSentences.php b/Strings/CountSentences.php
new file mode 100644
index 0000000..bf0d28f
--- /dev/null
+++ b/Strings/CountSentences.php
@@ -0,0 +1,15 @@
+<?php
+
+/**
+ * This is a simple way to count sentence
+ * using php preg_match_all() function
+ *
+ * @param string $sentence
+ * @return int
+ */
+function countSentences(string $sentence): int
+{
+    $sentence = trim($sentence);
+
+    return preg_match_all('/[^\s|^\...](\.|\!|\?)(?!\w)/', $sentence);
+}
diff --git a/String/CountVowels.php b/Strings/CountVowels.php
similarity index 55%
rename from String/CountVowels.php
rename to Strings/CountVowels.php
index c3477a9..e3eef0a 100644
--- a/String/CountVowels.php
+++ b/Strings/CountVowels.php
@@ -1,50 +1,46 @@
 <?php
 /**
- * This function returns
- * the Total no. of vowels
- * present in the given
- * string using a simple
- * method of looping
- * through all the
- * characters present in
- * the string.
+ * This function returns the total number of vowels present in
+ * the given string using a simple method of looping through
+ * all the characters present in the string.
  *
  * @param string $string
- * @return int   $noOfVowels
+ * @return int   $numberOfVowels
  */
 function countVowelsSimple(string $string)
 {
-    if (empty($string)) {
+    if (empty($string))
+    {
         throw new \Exception('Please pass a non-empty string value');
     }
 
-    $noOfVowels = 0;
+    $numberOfVowels = 0;
     $vowels     = ['a', 'e', 'i', 'o', 'u']; // Vowels Set
     $string     = strtolower($string); // For case-insensitive checking
     $characters = str_split($string); // Splitting the string to a Character Array.
 
-    foreach ($characters as $character) {
-        if (in_array($character, $vowels)) {
-            $noOfVowels++;
+    foreach ($characters as $character)
+    {
+        if (in_array($character, $vowels))
+        {
+            $numberOfVowels++;
         }
     }
 
-    return $noOfVowels;
+    return $numberOfVowels;
 }
 
 /**
- * This function returns
- * the Total no. of vowels
- * present in the given
- * string using a
- * regular expression.
+ * This function returns the Total number of vowels present in the given
+ * string using a regular expression.
  *
  * @param string $string
  * @return int
  */
 function countVowelsRegex(string $string)
 {
-    if (empty($string)) {
+    if (empty($string))
+    {
         throw new \Exception('Please pass a non-empty string value');
     }
     $string = strtolower($string); // For case-insensitive checking
diff --git a/String/EditDistance.php b/Strings/Distance.php
similarity index 94%
rename from String/EditDistance.php
rename to Strings/Distance.php
index 227ae1c..cdd3c42 100644
--- a/String/EditDistance.php
+++ b/Strings/Distance.php
@@ -1,13 +1,15 @@
 <?php
 /**
- * Edit distance (Levenshtein distance).
+ * Find distance (Levenshtein distance)
+ *
  * Compute the difference between two sequences, ie, the minimum number of changes
  * to get to $str2 from $str1
+ *
  * @param string $str1
  * @param string $str2
  * @return int the minimum number of changes to transform one string into another
  */
-function editDistance($str1, $str2)
+function findDistance($str1, $str2)
 {
     $lenStr1 = strlen($str1);
     $lenStr2 = strlen($str2);
@@ -22,6 +24,7 @@ function editDistance($str1, $str2)
 
     $distanceVectorInit = [];
     $distanceVectorFinal = [];
+
     for ($i = 0; $i < $lenStr1 + 1; $i++) {
         $distanceVectorInit[] = 0;
         $distanceVectorFinal[] = 0;
@@ -33,9 +36,11 @@ function editDistance($str1, $str2)
 
     for ($i = 0; $i < $lenStr2; $i++) {
         $distanceVectorFinal[0] = $i + 1;
+
         // use formula to fill in the rest of the row
         for ($j = 0; $j < $lenStr1; $j++) {
             $substitutionCost = 0;
+
             if ($str1[$j] == $str2[$i]) {
                 $substitutionCost = $distanceVectorInit[$j];
             } else {
@@ -50,4 +55,4 @@ function editDistance($str1, $str2)
 
 
     return $distanceVectorFinal[$lenStr1];
-}
\ No newline at end of file
+}
diff --git a/String/MaxCharacter.php b/Strings/MaxCharacter.php
similarity index 91%
rename from String/MaxCharacter.php
rename to Strings/MaxCharacter.php
index 2559973..9540491 100644
--- a/String/MaxCharacter.php
+++ b/Strings/MaxCharacter.php
@@ -1,8 +1,6 @@
 <?php
 /**
- * This function returns
- * the character which is
- * repeated maximum no. of
+ * This function returns the character which is repeated maximum number of
  * times in the given string.
  *
  * @param string $string
@@ -20,9 +18,11 @@ function maxCharacter(string $string)
 
     foreach ($characters as $character) {
         $currentCharacterCount = 1;
+
         if (isset($characterCountTable[$character])) {
             $currentCharacterCount = $characterCountTable[$character] + 1;
         }
+
         $characterCountTable[$character] = $currentCharacterCount;
     }
 
diff --git a/String/ReverseString.php b/Strings/ReverseString.php
similarity index 67%
rename from String/ReverseString.php
rename to Strings/ReverseString.php
index c2a6fdd..9d2d5e7 100644
--- a/String/ReverseString.php
+++ b/Strings/ReverseString.php
@@ -1,6 +1,12 @@
 <?php
 
-function reverse_string(string $string)
+/**
+ * This function returns a given string in reverse order
+ *
+ * @param string $string
+ * @return string
+ */
+function reverseString(string $string)
 {
     $string = trim($string); // Removing leading and trailing spaces
 
diff --git a/Strings/ReverseWords.php b/Strings/ReverseWords.php
new file mode 100644
index 0000000..843e12f
--- /dev/null
+++ b/Strings/ReverseWords.php
@@ -0,0 +1,22 @@
+<?php
+
+/**
+ * This function returns a given sentence with its words
+ * in reverse order
+ *
+ * @param string $string
+ * @return string
+ */
+function reverseWords(string $text)
+{
+    $text          = trim($text);
+    $words         = explode(' ', $text);
+    $reversedWords = [];
+
+    for ($i = (count($words) - 1); $i >= 0; $i--)
+    {
+        $reversedWords[] = $words[$i];
+    }
+
+    return implode(' ', $reversedWords);
+}
diff --git a/tests/StringTest.php b/tests/StringTest.php
deleted file mode 100644
index bf9725c..0000000
--- a/tests/StringTest.php
+++ /dev/null
@@ -1,78 +0,0 @@
-<?php
-
-use function PHPUnit\Framework\assertEquals;
-use function PHPUnit\Framework\assertFalse;
-use function PHPUnit\Framework\assertNotEquals;
-use function PHPUnit\Framework\assertTrue;
-use PHPUnit\Framework\TestCase;
-
-require_once __DIR__ . '/../vendor/autoload.php';
-
-require_once __DIR__ . '/../String/CheckPalindrome.php';
-require_once __DIR__ . '/../String/ReverseString.php';
-require_once __DIR__ . '/../String/ReverseWords.php';
-require_once __DIR__ . '/../String/CheckAnagram.php';
-require_once __DIR__ . '/../String/MaxCharacter.php';
-require_once __DIR__ . '/../String/CountVowels.php';
-require_once __DIR__ . '/../String/EditDistance.php';
-
-class StringTest extends TestCase
-{
-    public function testIsPalindrome()
-    {
-        assertTrue(is_palindrome('MaDam')); // true
-        assertFalse(is_palindrome('ThisIsTest')); // false
-        assertFalse(is_palindrome('')); // false
-        assertTrue(is_palindrome('Sator Arepo Tenet Opera Rotas')); // true
-        assertFalse(is_palindrome('Sator Arepo Tenet Opera Rotas', false)); // false since we are doing case-sensitive check
-    }
-
-    public function testReverseString()
-    {
-        assertEquals('txet emos si sihT', reverse_string('This is some text'));
-        assertEquals('mADaM', reverse_string('MaDAm'));
-        assertNotEquals('MaDAm', reverse_string('MaDAm'));
-    }
-
-    public function testReverseWords()
-    {
-        assertEquals('Fun is Coding PHP', reverse_words('PHP Coding is Fun'));
-        assertEquals('OneWord', reverse_words('OneWord'));
-        assertEquals('Text different some is This', reverse_words('This is some different Text'));
-    }
-
-    public function testIsAnagram()
-    {
-        assertTrue(isAnagram("php", "PHP")); // By default it's case-insensitive
-        assertFalse(isAnagram("php", "PHP", false)); // Make case-sensitive check
-        assertTrue(isAnagram("php is fun", "pin hpf us"));
-        assertFalse(isAnagram("Hello", " Hello")); //Extra space character
-        assertTrue(isAnagram("ScRamble", "SRlmcaeb", false)); // Check with a mixture of upper and lower case
-    }
-
-    public function testMaxCharacter()
-    {
-        assertEquals(maxCharacter("this is test for max character repetition"), 't');
-        assertEquals(maxCharacter("This is Test for max characTer repetition"), 't');
-        assertEquals(maxCharacter("           "), ' ');
-    }
-
-    public function testCountVowels()
-    {
-        assertEquals(countVowelsSimple("This is a string with 7 vowels"), 7);
-        assertEquals(countVowelsSimple("hello world"), 3);
-        assertEquals(countVowelsRegex("Just A list of somE aaaaaaaaaa"), 16);
-
-        assertEquals(countVowelsRegex("This is a string with 7 vowels"), 7);
-        assertEquals(countVowelsRegex("hello world"), 3);
-        assertEquals(countVowelsRegex("Just A list of somE aaaaaaaaaa"), 16);
-    }
-
-    public function testEditDistance()
-    {
-        assertEquals(editDistance("hello", "hallo"), 1);
-        assertEquals(editDistance("hallo", "hello"), 1);
-        assertEquals(editDistance("sunday", "sunday"), 0);
-        assertEquals(editDistance("saturday", "sunday"), 3);
-    }
-}
diff --git a/tests/Strings/StringsTest.php b/tests/Strings/StringsTest.php
new file mode 100644
index 0000000..9f5618f
--- /dev/null
+++ b/tests/Strings/StringsTest.php
@@ -0,0 +1,102 @@
+<?php
+
+use function PHPUnit\Framework\assertEquals;
+use function PHPUnit\Framework\assertFalse;
+use function PHPUnit\Framework\assertNotEquals;
+use function PHPUnit\Framework\assertTrue;
+use PHPUnit\Framework\TestCase;
+
+require_once __DIR__ . '/../vendor/autoload.php';
+
+require_once __DIR__ . '/../String/CheckPalindrome.php';
+require_once __DIR__ . '/../String/ReverseString.php';
+require_once __DIR__ . '/../String/ReverseWords.php';
+require_once __DIR__ . '/../String/CheckAnagram.php';
+require_once __DIR__ . '/../String/MaxCharacter.php';
+require_once __DIR__ . '/../String/CountVowels.php';
+require_once __DIR__ . '/../String/CountConsonants.php';
+require_once __DIR__ . '/../String/Distance.php';
+
+class StringTest extends TestCase
+{
+    public function testIsPalindrome()
+    {
+        assertTrue(isPalindrome('MaDam')); // true
+        assertFalse(isPalindrome('ThisIsTest')); // false
+        assertFalse(isPalindrome('')); // false
+        assertTrue(isPalindrome('Sator Arepo Tenet Opera Rotas')); // true
+        assertFalse(isPalindrome('Sator Arepo Tenet Opera Rotas', false)); // false since we are doing case-sensitive check
+    }
+
+    public function testIsPalindrome2()
+    {
+        assertTrue(checkPalindromeString('131')); // true
+        assertFalse(checkPalindromeString('roman')); // false
+        assertTrue(checkPalindromeString('Level', true)); // true
+        assertFalse(checkPalindromeString('Level', false)); // false
+        assertFalse(checkPalindromeString('palindrome')); // false
+    }
+
+    public function testCountSentences()
+    {
+        assertEquals(countSentences('Hi! Hello world.'), 2);
+        assertEquals(countSentences('i am testing. test....'), 2);
+        assertEquals(countSentences('How are you?'), 1);
+    }
+
+    public function testReverseString()
+    {
+        assertEquals('txet emos si sihT', reverseString('This is some text'));
+        assertEquals('mADaM', reverseString('MaDAm'));
+        assertNotEquals('MaDAm', reverseString('MaDAm'));
+    }
+
+    public function testReverseWords()
+    {
+        assertEquals('Fun is Coding PHP', reverseWords('PHP Coding is Fun'));
+        assertEquals('OneWord', reverseWords('OneWord'));
+        assertEquals('Text different some is This', reverseWords('This is some different Text'));
+    }
+
+    public function testIsAnagram()
+    {
+        assertTrue(isAnagram("php", "PHP")); // By default it's case-insensitive
+        assertFalse(isAnagram("php", "PHP", false)); // Make case-sensitive check
+        assertTrue(isAnagram("php is fun", "pin hpf us"));
+        assertFalse(isAnagram("Hello", " Hello")); //Extra space character
+        assertTrue(isAnagram("ScRamble", "SRlmcaeb", false)); // Check with a mixture of upper and lower case
+    }
+
+    public function testMaxCharacter()
+    {
+        assertEquals(maxCharacter("this is test for max character repetition"), 't');
+        assertEquals(maxCharacter("This is Test for max characTer repetition"), 't');
+        assertEquals(maxCharacter("           "), ' ');
+    }
+
+    public function testCountVowels()
+    {
+        assertEquals(countVowelsSimple("This is a string with 7 vowels"), 7);
+        assertEquals(countVowelsSimple("hello world"), 3);
+        assertEquals(countVowelsRegex("Just A list of somE aaaaaaaaaa"), 16);
+
+        assertEquals(countVowelsRegex("This is a string with 7 vowels"), 7);
+        assertEquals(countVowelsRegex("hello world"), 3);
+        assertEquals(countVowelsRegex("Just A list of somE aaaaaaaaaa"), 16);
+    }
+
+    public function testCountConsonants()
+    {
+        assertEquals(countConsonants("This is a string with 19 consonants"), 19);
+        assertEquals(countConsonants("hello world"), 7);
+        assertEquals(countConsonants("Just A list of somE aaaaaaaaaa"), 9);
+    }
+
+    public function testFindDistance()
+    {
+        assertEquals(findDistance("hello", "hallo"), 1);
+        assertEquals(findDistance("hallo", "hello"), 1);
+        assertEquals(findDistance("sunday", "sunday"), 0);
+        assertEquals(findDistance("saturday", "sunday"), 3);
+    }
+}