instances added god may help

tests/Service/Import/CsvReaderServiceTest.php

@@ -0,0 +1,65 @@
+<?php
+
+namespace MintyPHP\Tests\Service\Import;
+
+use MintyPHP\Service\Import\CsvReaderService;
+use PHPUnit\Framework\TestCase;
+
+class CsvReaderServiceTest extends TestCase
+{
+    private array $tmpFiles = [];
+
+    protected function tearDown(): void
+    {
+        foreach ($this->tmpFiles as $file) {
+            if (is_file($file)) {
+                @unlink($file);
+            }
+        }
+    }
+
+    public function testAnalyzeDetectsSemicolonAndBom(): void
+    {
+        $file = $this->newTmpFile("\xEF\xBB\xBFfirst_name;email\nMax;max@example.com\n");
+        $service = new CsvReaderService();
+
+        $result = $service->analyze($file, 20000);
+
+        $this->assertTrue($result['ok']);
+        $this->assertSame(';', $result['delimiter']);
+        $this->assertSame(['first_name', 'email'], $result['headers']);
+        $this->assertSame(1, $result['rows_total']);
+    }
+
+    public function testAnalyzeReturnsInvalidHeaderForDuplicateColumns(): void
+    {
+        $file = $this->newTmpFile("email,email\nfoo@example.com,bar@example.com\n");
+        $service = new CsvReaderService();
+
+        $result = $service->analyze($file, 20000);
+
+        $this->assertFalse($result['ok']);
+        $this->assertSame('invalid_csv_header', $result['code']);
+    }
+
+    public function testAnalyzeReturnsEmptyCsvWhenNoDataRows(): void
+    {
+        $file = $this->newTmpFile("email\n");
+        $service = new CsvReaderService();
+
+        $result = $service->analyze($file, 20000);
+
+        $this->assertFalse($result['ok']);
+        $this->assertSame('empty_csv', $result['code']);
+    }
+
+    private function newTmpFile(string $content): string
+    {
+        $file = tempnam(sys_get_temp_dir(), 'im_csv_');
+        $this->assertNotFalse($file);
+        file_put_contents($file, $content);
+        $this->tmpFiles[] = $file;
+        return $file;
+    }
+}
+