Closes #5704

ChangeLog-10.5.md

@@ -6,6 +6,7 @@ All notable changes of the PHPUnit 10.5 release series are documented in this fi
 
 ### Fixed
 
+* [#5704](https://github.com/sebastianbergmann/phpunit/issues/5704#issuecomment-1951105254): No warning when CLI options are used multiple times
 * [#5707](https://github.com/sebastianbergmann/phpunit/issues/5707): `--fail-on-empty-test-suite` CLI option is not documented in `--help` output
 * Resource usage information is printed when the `--debug` CLI option is used
 

src/TextUI/Configuration/Cli/Builder.php

@@ -16,6 +16,7 @@
 use function is_file;
 use function is_numeric;
 use function sprintf;
+use PHPUnit\Event\Facade as EventFacade;
 use PHPUnit\Runner\TestSuiteSorter;
 use PHPUnit\Util\Filesystem;
 use SebastianBergmann\CliParser\Exception as CliParserException;
@@ -127,6 +128,11 @@ final class Builder
     ];
     private const SHORT_OPTIONS = 'd:c:h';
 
+    /**
+     * @psalm-var array<string, non-negative-int>
+     */
+    private array $processed = [];
+
     /**
      * @throws Exception
      */
@@ -838,6 +844,8 @@ public function fromParameters(array $parameters): Configuration
 
                     break;
             }
+
+            $this->markProcessed($option[0]);
         }
 
         if (empty($iniSettings)) {
@@ -949,4 +957,27 @@ public function fromParameters(array $parameters): Configuration
             $debug,
         );
     }
+
+    /**
+     * @psalm-param non-empty-string $option
+     */
+    private function markProcessed(string $option): void
+    {
+        if (!isset($this->processed[$option])) {
+            $this->processed[$option] = 1;
+
+            return;
+        }
+
+        $this->processed[$option]++;
+
+        if ($this->processed[$option] === 2) {
+            EventFacade::emitter()->testRunnerTriggeredWarning(
+                sprintf(
+                    'Option %s cannot be used more than once',
+                    $option,
+                ),
+            );
+        }
+    }
 }

tests/end-to-end/event/duplicated-cli-options.phpt

@@ -0,0 +1,39 @@
+--TEST--
+The right events are emitted in the right order when duplicated CLI options are used
+--FILE--
+<?php declare(strict_types=1);
+$traceFile = tempnam(sys_get_temp_dir(), __FILE__);
+
+$_SERVER['argv'][] = '--do-not-cache-result';
+$_SERVER['argv'][] = '--no-configuration';
+$_SERVER['argv'][] = '--no-output';
+$_SERVER['argv'][] = '--log-events-text';
+$_SERVER['argv'][] = $traceFile;
+$_SERVER['argv'][] = '--filter';
+$_SERVER['argv'][] = 'foo';
+$_SERVER['argv'][] = '--filter';
+$_SERVER['argv'][] = 'bar';
+$_SERVER['argv'][] = '--filter';
+$_SERVER['argv'][] = 'baz';
+$_SERVER['argv'][] = __DIR__ . '/_files/SuccessTest.php';
+
+require __DIR__ . '/../../bootstrap.php';
+
+(new PHPUnit\TextUI\Application)->run($_SERVER['argv']);
+
+print file_get_contents($traceFile);
+
+unlink($traceFile);
+--EXPECTF--
+PHPUnit Started (PHPUnit %s using %s)
+Test Runner Triggered Warning (Option --filter cannot be used more than once)
+Test Runner Configured
+Test Suite Loaded (1 test)
+Event Facade Sealed
+Test Runner Started
+Test Suite Sorted
+Test Suite Filtered (0 tests)
+Test Runner Execution Started (0 tests)
+Test Runner Execution Finished
+Test Runner Finished
+PHPUnit Finished (Shell Exit Code: 1)