Added tests for sqlite emulated functions

src/Doctrine/SQLiteRegexExtension.php

@@ -47,9 +47,9 @@ class SQLiteRegexExtension
 
             //Ensure that the function really exists on the connection, as it is marked as experimental according to PHP documentation
             if($native_connection instanceof \PDO && method_exists($native_connection, 'sqliteCreateFunction' )) {
-                $native_connection->sqliteCreateFunction('REGEXP', $this->regexp(...), 2, \PDO::SQLITE_DETERMINISTIC);
+                $native_connection->sqliteCreateFunction('REGEXP', self::regexp(...), 2, \PDO::SQLITE_DETERMINISTIC);
-                $native_connection->sqliteCreateFunction('FIELD', $this->field(...), -1, \PDO::SQLITE_DETERMINISTIC);
+                $native_connection->sqliteCreateFunction('FIELD', self::field(...), -1, \PDO::SQLITE_DETERMINISTIC);
-                $native_connection->sqliteCreateFunction('FIELD2', $this->field2(...), 2, \PDO::SQLITE_DETERMINISTIC);
+                $native_connection->sqliteCreateFunction('FIELD2', self::field2(...), 2, \PDO::SQLITE_DETERMINISTIC);
             }
         }
     }
@@ -60,10 +60,11 @@ class SQLiteRegexExtension
      * @param  string  $value
      * @return int
      */
-    private function regexp(string $pattern, string $value): int
+    final public static function regexp(string $pattern, string $value): int
     {
         try {
             return (mb_ereg($pattern, $value)) ? 1 : 0;
+
         } catch (\ErrorException $e) {
             throw InvalidRegexException::fromMBRegexError($e);
         }
@@ -76,21 +77,21 @@ class SQLiteRegexExtension
      * @param  string  $imploded_array
      * @return int
      */
-    private function field2(string|int|null $value, string $imploded_array): int
+    final public static function field2(string|int|null $value, string $imploded_array): int
     {
         $array = explode(',', $imploded_array);
-        return $this->field($value, ...$array);
+        return self::field($value, ...$array);
     }
 
     /**
      * This function emulates the MySQL field function for SQLite
-     * This function returns the index (position) of the first argument in the subsequent arguments.#
+     * This function returns the index (position) of the first argument in the subsequent arguments.
      * If the first argument is not found or is NULL, 0 is returned.
      * @param  string|int|null  $value
      * @param  mixed  ...$array
      * @return int
      */
-    private function field(string|int|null $value, ...$array): int
+    final public static function field(string|int|null $value, ...$array): int
     {
         if ($value === null) {
             return 0;

tests/Doctrine/SQLiteRegexExtensionTest.php

@@ -0,0 +1,92 @@
+<?php
+/*
+ * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
+ *
+ *  Copyright (C) 2019 - 2023 Jan Böhmer (https://github.com/jbtronics)
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as published
+ *  by the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+namespace App\Tests\Doctrine;
+
+use App\Doctrine\SQLiteRegexExtension;
+use PHPUnit\Framework\TestCase;
+
+class SQLiteRegexExtensionTest extends TestCase
+{
+
+    public function regexpDataProvider(): \Generator
+    {
+        yield [1, 'a', 'a'];
+        yield [0, 'a', 'b'];
+        yield [1, 'a', 'ba'];
+        yield [1, 'a', 'ab'];
+        yield [1, 'a', 'baa'];
+
+        yield [1, '^a$', 'a'];
+        yield [0, '^a$', 'ab'];
+        yield [1, '^a\d+$', 'a123'];
+    }
+
+    /**
+     * @dataProvider regexpDataProvider
+     */
+    public function testRegexp(int $expected, string $pattern, string $value): void
+    {
+        $this->assertSame($expected, SQLiteRegexExtension::regexp($pattern, $value));
+    }
+
+    public function fieldDataProvider(): \Generator
+    {
+        yield [
+            // Null cases
+            0, null, [],
+            0, null, [1],
+            0, 42, [1, 2],
+
+            // Ints
+            1, 1, [1],
+            1, 2, [2, 1],
+            2, 1, [2, 1],
+            2, 2, [2, 1, 2],
+            5, 3, [2, 1, 2, 1, 2, 3],
+            1, 2, [2, 1, 2, 1, 2, 1, 2, 1, 2, 1],
+
+            // Strings
+            1, 'a', ['a'],
+            1, 'b', ['b', 'a'],
+            2, 'a', ['b', 'a'],
+            2, 'b', ['b', 'a', 'b'],
+            5, 'c', ['b', 'a', 'b', 'a', 'b', 'c'],
+        ];
+    }
+
+    /**
+     * @dataProvider fieldDataProvider
+     */
+    public function testField(int $expected, string|int|null $value, array $array): void
+    {
+        $this->assertSame($expected, SQLiteRegexExtension::field($value, ...$array));
+    }
+
+    /**
+     * @dataProvider fieldDataProvider
+     */
+    public function testField2(int $expected, string|int|null $value, array $array): void
+    {
+        //Should be the same as field, but with the array comma imploded
+        $string = implode(',', $array);
+        $this->assertSame($expected, SQLiteRegexExtension::field2($value, $string));
+    }
+}