Add more test cases

Author: adriansuter

tests/CodeConverterTest.php

@@ -11,16 +11,37 @@
 namespace AdrianSuter\Autoload\Override\Tests;
 
 use AdrianSuter\Autoload\Override\CodeConverter;
+use PhpParser\Parser;
 use PHPUnit\Framework\TestCase;
+use Prophecy\Argument;
+use Prophecy\Prophecy\MethodProphecy;
+use RuntimeException;
 
 class CodeConverterTest extends TestCase
 {
-    public function testA()
+    public function testConvert(): void
     {
         $converter = new CodeConverter();
         $this->assertEquals(
             '<?php echo \foo\rand(0, 9);',
             $converter->convert('<?php echo \rand(0, 9);', ['\rand' => 'foo\rand'])
         );
     }
+
+    public function testExceptionIfParserReturnsNull(): void
+    {
+        $this->expectException(RuntimeException::class);
+        $this->expectExceptionMessage('Code could not be parsed.');
+
+        $parserProphecy = $this->prophesize(Parser::class);
+
+        $parseProphecy = new MethodProphecy($parserProphecy, 'parse', [Argument::any()]);
+        $parseProphecy->willReturn(null);
+
+        /** @var Parser $parser */
+        $parser = $parserProphecy->reveal();
+
+        $converter = new CodeConverter(null, $parser);
+        $converter->convert('<?php echo "1";', []);
+    }
 }