change: sync binary search

exercises/practice/binary-search/.docs/instructions.md

@@ -11,7 +11,7 @@ Binary search only works when a list has been sorted.
 
 The algorithm looks like this:
 
-- Find the middle element of a *sorted* list and compare it with the item we're looking for.
+- Find the middle element of a _sorted_ list and compare it with the item we're looking for.
 - If the middle element is our item, then we're done!
 - If the middle element is greater than our item, we can eliminate that element and all the elements **after** it.
 - If the middle element is less than our item, we can eliminate that element and all the elements **before** it.

exercises/practice/binary-search/.meta/example.php

@@ -1,27 +1,5 @@
 <?php
 
-/*
- * By adding type hints and enabling strict type checking, code can become
- * easier to read, self-documenting and reduce the number of potential bugs.
- * By default, type declarations are non-strict, which means they will attempt
- * to change the original type to match the type specified by the
- * type-declaration.
- *
- * In other words, if you pass a string to a function requiring a float,
- * it will attempt to convert the string value to a float.
- *
- * To enable strict mode, a single declare directive must be placed at the top
- * of the file.
- * This means that the strictness of typing is configured on a per-file basis.
- * This directive not only affects the type declarations of parameters, but also
- * a function's return type.
- *
- * For more info review the Concept on strict type checking in the PHP track
- * <link>.
- *
- * To disable strict typing, comment out the directive below.
- */
-
 declare(strict_types=1);
 
 function find($needle, $haystack)

exercises/practice/binary-search/BinarySearchTest.php

@@ -1,27 +1,5 @@
 <?php
 
-/*
- * By adding type hints and enabling strict type checking, code can become
- * easier to read, self-documenting and reduce the number of potential bugs.
- * By default, type declarations are non-strict, which means they will attempt
- * to change the original type to match the type specified by the
- * type-declaration.
- *
- * In other words, if you pass a string to a function requiring a float,
- * it will attempt to convert the string value to a float.
- *
- * To enable strict mode, a single declare directive must be placed at the top
- * of the file.
- * This means that the strictness of typing is configured on a per-file basis.
- * This directive not only affects the type declarations of parameters, but also
- * a function's return type.
- *
- * For more info review the Concept on strict type checking in the PHP track
- * <link>.
- *
- * To disable strict typing, comment out the directive below.
- */
-
 declare(strict_types=1);
 
 class BinarySearchTest extends PHPUnit\Framework\TestCase
@@ -31,47 +9,102 @@ public static function setUpBeforeClass(): void
         require_once 'BinarySearch.php';
     }
 
+    /**
+     * @testdox It works with one element
+     * uuid b55c24a9-a98d-4379-a08c-2adcf8ebeee8
+     */
     public function testItWorksWithOneElement(): void
     {
         $this->assertEquals(0, find(6, [6]));
     }
 
+    /**
+     * @testdox It finds value in the middle
+     * uuid 73469346-b0a0-4011-89bf-989e443d503d
+     */
     public function testItFindsValueInMiddle(): void
     {
         $this->assertEquals(3, find(6, [1, 3, 4, 6, 8, 9, 11]));
     }
 
+    /**
+     * @testdox It finds value at the beginning
+     * uuid 327bc482-ab85-424e-a724-fb4658e66ddb
+     */
     public function testItFindsValueInBeginning(): void
     {
         $this->assertEquals(0, find(1, [1, 3, 4, 6, 8, 9, 11]));
     }
 
+    /**
+     * @testdox It finds value at the end
+     * uuid f9f94b16-fe5e-472c-85ea-c513804c7d59
+     */
     public function testItFindsValueAtEnd(): void
     {
         $this->assertEquals(6, find(11, [1, 3, 4, 6, 8, 9, 11]));
     }
 
+    /**
+     * @testdox It finds value in an odd-length array
+     * uuid f0068905-26e3-4342-856d-ad153cadb338
+     */
     public function testItFindsValueInOddLengthArray(): void
     {
         $this->assertEquals(9, find(144, [1, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 634]));
     }
 
+    /**
+     * @testdox It finds value in an even-length array
+     * uuid fc316b12-c8b3-4f5e-9e89-532b3389de8c
+     */
     public function testItFindsValueInEvenLengthArray(): void
     {
         $this->assertEquals(5, find(21, [1, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377]));
     }
+
+    /**
+     * @testdox It identifies that value is not in array
+     * uuid da7db20a-354f-49f7-a6a1-650a54998aa6
+     */
+    public function testValueNotIncludedInArray(): void
+    {
+        $this->assertEquals(-1, find(7, [1, 3, 4, 6, 8, 9, 11]));
+    }
+
+    /**
+     * @testdox It does not find a value lower than the lowest value
+     * uuid 95d869ff-3daf-4c79-b622-6e805c675f97
+     */
     public function testLowerThanLowestValueNotIn(): void
     {
         $this->assertEquals(-1, find(0, [1, 3, 4, 6, 8, 9, 11]));
     }
 
+    /**
+     * @testdox It does not find a value larger than the largest value
+     * uuid 8b24ef45-6e51-4a94-9eac-c2bf38fdb0ba
+     */
     public function testLargerThanLargestValueNotIn(): void
     {
         $this->assertEquals(-1, find(13, [1, 3, 4, 6, 8, 9, 11]));
     }
 
+    /**
+     * @testdox It does not find any value in an empty array
+     * uuid f439a0fa-cf42-4262-8ad1-64bf41ce566a
+     */
     public function testNothingInEmptyArray(): void
     {
         $this->assertEquals(-1, find(1, []));
     }
+
+    /**
+     * @testdox It does not find any value in left and right of array
+     * uuid 2c353967-b56d-40b8-acff-ce43115eed64
+     */
+    public function testNothingFoundInLeftAndRight()
+    {
+        $this->assertEquals(-1, find(0, [1, 2]));
+    }
 }