Text function array value tests, plus some cleanup

tests/PhpSpreadsheetTests/Calculation/Functions/TextData/CodeTest.php

@@ -2,6 +2,8 @@
 
 namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
 
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+
 class CodeTest extends AllSetupTeardown
 {
     /**
@@ -28,4 +30,25 @@ class CodeTest extends AllSetupTeardown
     {
         return require 'tests/data/Calculation/TextData/CODE.php';
     }
+    
+    /**
+     * @dataProvider providerCodeArray
+     */
+    public function testCodeArray(array $expectedResult, string $array): void
+    {
+        $calculation = Calculation::getInstance();
+
+        $formula = "=CODE({$array})";
+        $result = $calculation->_calculateFormulaValue($formula);
+        self::assertEqualsWithDelta($expectedResult, $result, 1.0e-14);
+    }
+
+    public function providerCodeArray(): array
+    {
+        return [
+            'row vector' => [[[80, 72, 80]], '{"P", "H", "P"}'],
+            'column vector' => [[[80], [72], [80]], '{"P"; "H"; "P"}'],
+            'matrix' => [[[89, 111], [108, 111]], '{"Y", "o"; "l", "o"}'],
+        ];
+    }
 }