tests: removed unnecessary test

Author: odinuv

README.md

@@ -54,7 +54,7 @@ foreach ($rows as $row) {
 ## Installation
 
 The library is available as [composer package](https://getcomposer.org/doc/00-intro.md#installation-linux-unix-osx). 
-To start using composer in your project follow these steps:
+To start using this library in your project follow these steps:
 
 **Install package:**
 

tests/CsvFileErrorsTest.php

@@ -9,20 +9,12 @@
 
 class CsvFileErrorsTest extends TestCase
 {
-    public function testNonExistentFile()
-    {
-        $csv = new CsvFile(__DIR__ . '/something.csv');
-        self::expectException(Exception::class);
-        self::expectExceptionMessage('Cannot open file');
-        $csv->getHeader();
-    }
-
     public function testException()
     {
         try {
-            $csv = new CsvFile(__DIR__ . '/something.csv');
+            $csv = new CsvFile(__DIR__ . '/nonexistent.csv');
             $csv->getHeader();
-            self::fail("Mush throw exception.");
+            self::fail("Must throw exception.");
         } catch (Exception $e) {
             self::assertContains('Cannot open file', $e->getMessage());
             self::assertEquals(1, $e->getCode());