run-tests: echo message and exit if no tests found

The test runner currently defaults to running the entire test suite if
no selected tests can be found. This can be unexpected.

For example the ext/mysqlnd/ directory has no tests, if you specify that
directory when testing the entire test suite will be run.

    run-tests.php [options] ext/mysqlnd/

Closes GH-5605.

diff --git a/run-tests.php b/run-tests.php
index d14fcafeeed24314cb7a95be09465910d1eea37f..51a82aad64cf980cb518c80ffa55cf3b89609e07 100755 (executable)
--- a/run-tests.php
+++ b/run-tests.php
@@ -394,6 +394,7 @@ NO_PROC_OPEN_ERROR;
     $temp_urlbase = null;
     $conf_passed = null;
     $no_clean = false;
+    $selected_tests = false;
     $slow_min_ms = INF;
     $preload = false;
     $file_cache = null;
@@ -634,6 +635,7 @@ NO_PROC_OPEN_ERROR;
         }
 
         if (!$is_switch) {
+            $selected_tests = true;
             $testfile = realpath($argv[$i]);
 
             if (!$testfile && strpos($argv[$i], '*') !== false && function_exists('glob')) {
@@ -664,6 +666,11 @@ NO_PROC_OPEN_ERROR;
         }
     }
 
+    if ($selected_tests && count($test_files) === 0) {
+        echo "No tests found.\n";
+        return;
+    }
+
     // Default to PHP_BINARY as executable
     if (!isset($environment['TEST_PHP_EXECUTABLE'])) {
         $php = PHP_BINARY;