Add TestArrayHelper.php

tests/Unit/Helper/TestArrayHelper.php

@@ -0,0 +1,54 @@
+<?php
+
+namespace Unit\Helper;
+
+use PHPUnit\Framework\TestCase;
+
+require_once __DIR__ . '/../../../application/helpers/array_helper.php';
+
+class TestArrayHelper extends TestCase {
+    public function test_is_assoc_returns_true_on_associative_array()
+    {
+        $this->assertTrue(is_assoc(['test' => 'value']));
+    }
+
+    public function test_is_assoc_returns_false_on_indexed_array()
+    {
+        $this->assertFalse(is_assoc(['one', 'two', 'three']));
+    }
+
+    public function test_is_assoc_returns_true_on_mixed_array()
+    {
+        $this->assertTrue(is_assoc(['one', 'two', 'three' => 'value']));
+    }
+
+    public function test_array_find_returns_correct_element()
+    {
+        $arr = [
+            [
+                'id' => 1
+            ],
+            [
+                'id' => 2
+            ],
+            [
+                'id' => 3
+            ],
+        ];
+
+        $this->assertSame($arr[0], array_find($arr, fn($element) => $element['id'] === 1));
+    }
+
+    public function test_array_fields_returns_stripped_array()
+    {
+        $arr = [
+            'name' => 'John',
+            'email' => 'john@example.org',
+        ];
+
+        $stripped = array_fields($arr, ['name']);
+
+        $this->assertArrayHasKey('name', $stripped);
+        $this->assertArrayNotHasKey('email', $stripped);
+    }
+}