Issue #3437169 by oldeb, Grimreaper: Fix tests

Closes #3437169

tests/src/Functional/ExecuteCodeTest.php

@@ -71,15 +71,15 @@ class ExecuteCodeTest extends BrowserTestBase {
     $this->drupalGet($url);
 
     $edit['code'] = 'devel_help()';
-    $this->submitForm($edit, $this->t('Execute'));
+    $this->submitForm($edit, 'Execute');
     $this->assertSession()->pageTextContains('syntax error, unexpected end of file');
 
     $edit['code'] = 'devel_help2();';
-    $this->submitForm($edit, $this->t('Execute'));
+    $this->submitForm($edit, 'Execute');
     $this->assertSession()->pageTextContains('Call to undefined function devel_help2()');
 
     $edit['code'] = 'devel_help();';
-    $this->submitForm($edit, $this->t('Execute'));
+    $this->submitForm($edit, 'Execute');
     $this->assertSession()->pageTextContains('Too few arguments to function devel_help(), 0 passed');
   }
 
@@ -87,16 +87,17 @@ class ExecuteCodeTest extends BrowserTestBase {
    * Tests output buffer.
    */
   public function testOutputBuffer(): void {
-    $edit = [];
     $url = Url::fromRoute('devel_php.execute_php');
 
     $this->drupalLogin($this->user);
     $this->drupalGet($url);
     $this->assertSession()->pageTextNotContains(\Drupal::VERSION);
 
+    $edit = [];
     $edit['code'] = 'echo \Drupal::VERSION;';
-    $this->submitForm($edit, $this->t('Execute'));
-    $this->assertSession()->pageTextContains(\Drupal::VERSION);
+    $this->submitForm($edit, 'Execute');
+    $elements = $this->xpath('//div[@aria-label="Status message"]/pre/span[contains(text(), :message)]', [':message' => \Drupal::VERSION]);
+    $this->assertNotEmpty($elements, 'Dumped message is present.');
   }
 
 }