Emit TestRunner\WarningTriggered events for warnings from loading the XML configuration file

Author: sebastianbergmann

src/TextUI/Configuration/Merger.php

@@ -616,16 +616,24 @@ public function merge(CliConfiguration $cliConfiguration, XmlConfiguration $xmlC
             $randomOrderSeed = time();
         }
 
-        if ($xmlConfiguration->wasLoadedFromFile() && $xmlConfiguration->hasValidationErrors()) {
-            if ((new SchemaDetector)->detect($xmlConfiguration->filename())->detected()) {
-                EventFacade::emitter()->testRunnerTriggeredDeprecation(
-                    'Your XML configuration validates against a deprecated schema. Migrate your XML configuration using "--migrate-configuration"!',
-                );
-            } else {
-                EventFacade::emitter()->testRunnerTriggeredWarning(
-                    "Test results may not be as expected because the XML configuration file did not pass validation:\n" .
-                    $xmlConfiguration->validationErrors(),
-                );
+        if ($xmlConfiguration->wasLoadedFromFile()) {
+            if ($xmlConfiguration->hasValidationErrors()) {
+                if ((new SchemaDetector)->detect($xmlConfiguration->filename())->detected()) {
+                    EventFacade::emitter()->testRunnerTriggeredDeprecation(
+                        'Your XML configuration validates against a deprecated schema. Migrate your XML configuration using "--migrate-configuration"!',
+                    );
+                } else {
+                    EventFacade::emitter()->testRunnerTriggeredWarning(
+                        "Test results may not be as expected because the XML configuration file did not pass validation:\n" .
+                        $xmlConfiguration->validationErrors(),
+                    );
+                }
+            }
+
+            if ($xmlConfiguration->hasWarnings()) {
+                foreach ($xmlConfiguration->warnings() as $warning) {
+                    EventFacade::emitter()->testRunnerTriggeredWarning($warning);
+                }
             }
         }