Issue #3128746 by mondrake, longwave, dww: Replace assertions involving calls...

Issue #3128746 by mondrake, longwave, dww: Replace assertions involving calls to strpos() with more accurate string assertions

core/modules/aggregator/tests/src/Functional/AddFeedTest.php

@@ -67,7 +67,7 @@ public function testFeedLabelEscaping() {
     $this->assertNoRaw('Test feed title <script>alert(123);</script>');
 
     // Ensure the feed icon title is escaped.
-    $this->assertTrue(strpos(str_replace(["\n", "\r"], '', $this->getSession()->getPage()->getContent()), 'class="feed-icon">  Subscribe to Test feed title &lt;script&gt;alert(123);&lt;/script&gt; feed</a>') !== FALSE);
+    $this->assertStringContainsString('class="feed-icon">  Subscribe to Test feed title &lt;script&gt;alert(123);&lt;/script&gt; feed</a>', str_replace(["\n", "\r"], '', $this->getSession()->getPage()->getContent()));
   }
 
   /**

core/modules/aggregator/tests/src/Functional/FeedProcessorPluginTest.php

@@ -38,7 +38,7 @@ public function testProcess() {
     $this->updateFeedItems($feed);
     foreach ($feed->items as $iid) {
       $item = Item::load($iid);
-      $this->assertTrue(strpos($item->label(), 'testProcessor') === 0);
+      $this->assertStringStartsWith('testProcessor', $item->label());
     }
   }
 

core/modules/basic_auth/tests/src/Functional/BasicAuthTest.php

@@ -47,7 +47,8 @@ public function testBasicAuth() {
     $this->assertResponse('200', 'HTTP response is OK');
     $this->mink->resetSessions();
     $this->assertNull($this->drupalGetHeader('X-Drupal-Cache'));
-    $this->assertIdentical(strpos($this->drupalGetHeader('Cache-Control'), 'public'), FALSE, 'Cache-Control is not set to public');
+    // Check that Cache-Control is not set to public.
+    $this->assertSession()->responseHeaderNotContains('Cache-Control', 'public');
 
     $this->basicAuthGet($url, $account->getAccountName(), $this->randomMachineName());
     $this->assertNoText($account->getAccountName(), 'Bad basic auth credentials do not authenticate the user.');
@@ -75,7 +76,8 @@ public function testBasicAuth() {
     $this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), 'MISS');
     $this->basicAuthGet($url, $account->getAccountName(), $account->pass_raw);
     $this->assertNull($this->drupalGetHeader('X-Drupal-Cache'));
-    $this->assertIdentical(strpos($this->drupalGetHeader('Cache-Control'), 'public'), FALSE, 'No page cache response when requesting a cached page with basic auth credentials.');
+    // Check that Cache-Control is not set to public.
+    $this->assertSession()->responseHeaderNotContains('Cache-Control', 'public');
   }
 
   /**

core/modules/big_pipe/tests/src/Functional/BigPipeTest.php

@@ -194,9 +194,9 @@ public function testBigPipe() {
     $this->assertEqual($log_count + 2, $connection->query('SELECT COUNT(*) FROM {watchdog}')->fetchField(), 'Two new watchdog entries.');
     $records = $connection->query('SELECT * FROM {watchdog} ORDER BY wid DESC LIMIT 2')->fetchAll();
     $this->assertEqual(RfcLogLevel::ERROR, $records[0]->severity);
-    $this->assertTrue(FALSE !== strpos((string) unserialize($records[0]->variables)['@message'], 'Oh noes!'));
+    $this->assertStringContainsString('Oh noes!', (string) unserialize($records[0]->variables)['@message']);
     $this->assertEqual(RfcLogLevel::ERROR, $records[1]->severity);
-    $this->assertTrue(FALSE !== strpos((string) unserialize($records[1]->variables)['@message'], 'You are not allowed to say llamas are not cool!'));
+    $this->assertStringContainsString('You are not allowed to say llamas are not cool!', (string) unserialize($records[1]->variables)['@message']);
 
     // Verify that 4xx responses work fine. (4xx responses are handled by
     // subrequests to a route pointing to a controller with the desired output.)
@@ -321,7 +321,8 @@ public function testBigPipeMultiOccurrencePlaceholders() {
 
   protected function assertBigPipeResponseHeadersPresent() {
     $this->pass('Verifying BigPipe response headers…', 'Debug');
-    $this->assertTrue(FALSE !== strpos($this->drupalGetHeader('Cache-Control'), 'private'), 'Cache-Control header set to "private".');
+    // Check that Cache-Control header set to "private".
+    $this->assertSession()->responseHeaderContains('Cache-Control', 'private');
     $this->assertEqual('no-store, content="BigPipe/1.0"', $this->drupalGetHeader('Surrogate-Control'));
     $this->assertEqual('no', $this->drupalGetHeader('X-Accel-Buffering'));
   }
@@ -477,7 +478,7 @@ protected function assertBigPipeNoJsMetaRefreshRedirect() {
 
     // First response: redirect.
     $this->assertEqual(302, $statuses[0], 'The first response was a 302 (redirect).');
-    $this->assertIdentical(0, strpos($headers[0]['Set-Cookie'][0], 'big_pipe_nojs=1'), 'The first response sets the big_pipe_nojs cookie.');
+    $this->assertStringStartsWith('big_pipe_nojs=1', $headers[0]['Set-Cookie'][0], 'The first response sets the big_pipe_nojs cookie.');
     $this->assertEqual($original_url, $headers[0]['Location'][0], 'The first response redirected back to the original page.');
     $this->assertTrue(empty(array_diff(['cookies:big_pipe_nojs', 'session.exists'], explode(' ', $headers[0]['X-Drupal-Cache-Contexts'][0]))), 'The first response varies by the "cookies:big_pipe_nojs" and "session.exists" cache contexts.');
     $this->assertFalse(isset($headers[0]['Surrogate-Control']), 'The first response has no "Surrogate-Control" header.');

core/modules/ckeditor/tests/src/Functional/CKEditorAdminTest.php

@@ -280,7 +280,7 @@ public function testNewFormat() {
     // Regression test for https://www.drupal.org/node/2606460.
     $settings = $this->getDrupalSettings();
     $expected = $settings['ckeditor']['toolbarAdmin'];
-    $this->assertTrue(strpos($expected, '<li data-drupal-ckeditor-button-name="Bold" class="ckeditor-button"><a href="#" class="cke-icon-only cke_ltr" role="button" title="bold" aria-label="bold"><span class="cke_button_icon cke_button__bold_icon">bold</span></a></li>') !== FALSE);
+    $this->assertStringContainsString('<li data-drupal-ckeditor-button-name="Bold" class="ckeditor-button"><a href="#" class="cke-icon-only cke_ltr" role="button" title="bold" aria-label="bold"><span class="cke_button_icon cke_button__bold_icon">bold</span></a></li>', $expected);
 
     // Ensure the styles textarea exists and is initialized empty.
     $styles_textarea = $this->xpath('//textarea[@name="editor[settings][plugins][stylescombo][styles]"]');

core/modules/color/tests/src/Functional/ColorTest.php

@@ -123,7 +123,7 @@ public function _testColor($theme, $test_values) {
     foreach ($stylesheets as $stylesheet) {
       $this->assertPattern('|' . file_url_transform_relative(file_create_url($stylesheet)) . '|', 'Make sure the color stylesheet is included in the content. (' . $theme . ')');
       $stylesheet_content = implode("\n", file($stylesheet));
-      $this->assertTrue(strpos($stylesheet_content, 'color: #123456') !== FALSE, 'Make sure the color we changed is in the color stylesheet. (' . $theme . ')');
+      $this->assertStringContainsString('color: #123456', $stylesheet_content, 'Make sure the color we changed is in the color stylesheet. (' . $theme . ')');
     }
 
     $this->drupalGet($settings_path);
@@ -135,7 +135,7 @@ public function _testColor($theme, $test_values) {
     $stylesheets = $this->config('color.theme.' . $theme)->get('stylesheets');
     foreach ($stylesheets as $stylesheet) {
       $stylesheet_content = implode("\n", file($stylesheet));
-      $this->assertTrue(strpos($stylesheet_content, 'color: ' . $test_values['scheme_color']) !== FALSE, 'Make sure the color we changed is in the color stylesheet. (' . $theme . ')');
+      $this->assertStringContainsString('color: ' . $test_values['scheme_color'], $stylesheet_content, 'Make sure the color we changed is in the color stylesheet. (' . $theme . ')');
     }
 
     // Test with aggregated CSS turned on.
@@ -148,7 +148,7 @@ public function _testColor($theme, $test_values) {
     foreach ($stylesheets as $uri) {
       $stylesheet_content .= implode("\n", file(\Drupal::service('file_system')->realpath($uri)));
     }
-    $this->assertTrue(strpos($stylesheet_content, 'public://') === FALSE, 'Make sure the color paths have been translated to local paths. (' . $theme . ')');
+    $this->assertStringNotContainsString('public://', $stylesheet_content, 'Make sure the color paths have been translated to local paths. (' . $theme . ')');
     $config->set('css.preprocess', 0);
     $config->save();
   }

core/modules/comment/tests/src/Functional/CommentAnonymousTest.php

@@ -50,8 +50,8 @@ public function testAnonymous() {
     $this->drupalPostForm($this->node->toUrl(), $edit, t('Preview'));
     // Cannot use assertRaw here since both title and body are in the form.
     $preview = (string) $this->cssSelect('.preview')[0]->getHtml();
-    $this->assertTrue(strpos($preview, $title) !== FALSE, 'Anonymous user can preview comment title.');
-    $this->assertTrue(strpos($preview, $body) !== FALSE, 'Anonymous user can preview comment body.');
+    $this->assertStringContainsString($title, $preview, 'Anonymous user can preview comment title.');
+    $this->assertStringContainsString($body, $preview, 'Anonymous user can preview comment body.');
 
     // Preview comments (without `skip comment approval` permission).
     user_role_revoke_permissions(RoleInterface::ANONYMOUS_ID, ['skip comment approval']);
@@ -63,8 +63,8 @@ public function testAnonymous() {
     $this->drupalPostForm($this->node->toUrl(), $edit, t('Preview'));
     // Cannot use assertRaw here since both title and body are in the form.
     $preview = (string) $this->cssSelect('.preview')[0]->getHtml();
-    $this->assertTrue(strpos($preview, $title) !== FALSE, 'Anonymous user can preview comment title.');
-    $this->assertTrue(strpos($preview, $body) !== FALSE, 'Anonymous user can preview comment body.');
+    $this->assertStringContainsString($title, $preview, 'Anonymous user can preview comment title.');
+    $this->assertStringContainsString($body, $preview, 'Anonymous user can preview comment body.');
     user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, ['skip comment approval']);
 
     // Post anonymous comment without contact info.

core/modules/config/tests/src/Functional/ConfigSingleImportExportTest.php

@@ -188,7 +188,7 @@ public function testImport() {
       $entity = $storage->load('second');
       $this->assertRaw(t('The configuration was imported successfully.'));
       $this->assertTrue(is_string($entity->label()), 'Entity label is a string');
-      $this->assertTrue(strpos($entity->label(), 'ObjectSerialization') > 0, 'Label contains serialized object');
+      $this->assertStringContainsString('ObjectSerialization', $entity->label(), 'Label contains serialized object');
     }
     else {
       // If the Symfony parser is used there will be an error.

core/modules/contact/tests/src/Functional/ContactPersonalTest.php

@@ -91,9 +91,9 @@ public function testSendPersonalContactMessage() {
     ];
     $subject = PlainTextOutput::renderFromHtml(t('[@site-name] @subject', $variables));
     $this->assertEqual($mail['subject'], $subject, 'Subject is in sent message.');
-    $this->assertTrue(strpos($mail['body'], 'Hello ' . $variables['@recipient-name']) !== FALSE, 'Recipient name is in sent message.');
-    $this->assertTrue(strpos($mail['body'], $this->webUser->getDisplayName()) !== FALSE, 'Sender name is in sent message.');
-    $this->assertTrue(strpos($mail['body'], $message['message[0][value]']) !== FALSE, 'Message body is in sent message.');
+    $this->assertStringContainsString('Hello ' . $variables['@recipient-name'], $mail['body'], 'Recipient name is in sent message.');
+    $this->assertStringContainsString($this->webUser->getDisplayName(), $mail['body'], 'Sender name is in sent message.');
+    $this->assertStringContainsString($message['message[0][value]'], $mail['body'], 'Message body is in sent message.');
 
     // Check there was no problems raised during sending.
     $this->drupalLogout();

core/modules/filter/tests/src/Kernel/FilterKernelTest.php

@@ -879,28 +879,20 @@ public function assertFilteredString($filter, $tests) {
     foreach ($tests as $source => $tasks) {
       $result = $filter->process($source, $filter)->getProcessedText();
       foreach ($tasks as $value => $is_expected) {
-        // Not using assertIdentical, since combination with strpos() is hard to grok.
         if ($is_expected) {
-          $success = $this->assertTrue(strpos($result, $value) !== FALSE, new FormattableMarkup('@source: @value found. Filtered result: @result.', [
+          $this->assertStringContainsString($value, $result, new FormattableMarkup('@source: @value found. Filtered result: @result.', [
             '@source' => var_export($source, TRUE),
             '@value' => var_export($value, TRUE),
             '@result' => var_export($result, TRUE),
           ]));
         }
         else {
-          $success = $this->assertTrue(strpos($result, $value) === FALSE, new FormattableMarkup('@source: @value not found. Filtered result: @result.', [
+          $this->assertStringNotContainsString($value, $result, new FormattableMarkup('@source: @value not found. Filtered result: @result.', [
             '@source' => var_export($source, TRUE),
             '@value' => var_export($value, TRUE),
             '@result' => var_export($result, TRUE),
           ]));
         }
-        if (!$success) {
-          $this->verbose('Source:<pre>' . Html::escape(var_export($source, TRUE)) . '</pre>'
-            . '<hr />' . 'Result:<pre>' . Html::escape(var_export($result, TRUE)) . '</pre>'
-            . '<hr />' . ($is_expected ? 'Expected:' : 'Not expected:')
-            . '<pre>' . Html::escape(var_export($value, TRUE)) . '</pre>'
-          );
-        }
       }
     }
   }
@@ -1151,7 +1143,7 @@ public function testHtmlCorrectorFilter() {
    *   TRUE on pass, FALSE on fail.
    */
   public function assertNormalized($haystack, $needle, $message = '', $group = 'Other') {
-    return $this->assertTrue(strpos(strtolower(Html::decodeEntities($haystack)), $needle) !== FALSE, $message, $group);
+    return $this->assertStringContainsString($needle, strtolower(Html::decodeEntities($haystack)), $message);
   }
 
   /**
@@ -1176,7 +1168,7 @@ public function assertNormalized($haystack, $needle, $message = '', $group = 'Ot
    *   TRUE on pass, FALSE on fail.
    */
   public function assertNoNormalized($haystack, $needle, $message = '', $group = 'Other') {
-    return $this->assertTrue(strpos(strtolower(Html::decodeEntities($haystack)), $needle) === FALSE, $message, $group);
+    return $this->assertStringNotContainsString($needle, strtolower(Html::decodeEntities($haystack)), $message);
   }
 
 }

core/modules/image/tests/src/Functional/ImageAdminStylesTest.php

@@ -152,7 +152,7 @@ public function testStyle() {
 
     // Ensure that the image style URI matches our expected path.
     $style_uri_path = $style->toUrl()->toString();
-    $this->assertTrue(strpos($style_uri_path, $style_path) !== FALSE, 'The image style URI is correct.');
+    $this->assertStringContainsString($style_path, $style_uri_path, 'The image style URI is correct.');
 
     // Confirm that all effects on the image style have settings that match
     // what was saved.

core/modules/image/tests/src/Functional/ImageStylesPathAndUrlTest.php

@@ -169,7 +169,7 @@ public function doImageStyleUrlAndPathTests($scheme, $clean_url = TRUE, $extra_s
 
     // Make sure that language prefix is never added to the image style URL.
     if ($langcode) {
-      $this->assertTrue(strpos($generate_url, "/$langcode/") === FALSE, 'Langcode was not found in the image style URL.');
+      $this->assertStringNotContainsString("/$langcode/", $generate_url, 'Langcode was not found in the image style URL.');
     }
 
     // Ensure that the tests still pass when the file is generated by accessing
@@ -181,7 +181,7 @@ public function doImageStyleUrlAndPathTests($scheme, $clean_url = TRUE, $extra_s
       $generate_url = $this->style->buildUrl($modified_uri, $clean_url);
     }
     if (!$clean_url) {
-      $this->assertTrue(strpos($generate_url, 'index.php/') !== FALSE, 'When using non-clean URLS, the system path contains the script name.');
+      $this->assertStringContainsString('index.php/', $generate_url, 'When using non-clean URLS, the system path contains the script name.');
     }
     // Add some extra chars to the token.
     $this->drupalGet(str_replace(IMAGE_DERIVATIVE_TOKEN . '=', IMAGE_DERIVATIVE_TOKEN . '=Zo', $generate_url));
@@ -217,7 +217,8 @@ public function doImageStyleUrlAndPathTests($scheme, $clean_url = TRUE, $extra_s
 
     if ($scheme == 'private') {
       $this->assertEqual($this->drupalGetHeader('Expires'), 'Sun, 19 Nov 1978 05:00:00 GMT', 'Expires header was sent.');
-      $this->assertNotEqual(strpos($this->drupalGetHeader('Cache-Control'), 'no-cache'), FALSE, 'Cache-Control header contains \'no-cache\' to prevent caching.');
+      // Check that Cache-Control header contains 'no-cache' to prevent caching.
+      $this->assertSession()->responseHeaderContains('Cache-Control', 'no-cache');
       $this->assertEqual($this->drupalGetHeader('X-Image-Owned-By'), 'image_module_test', 'Expected custom header has been added.');
 
       // Make sure that a second request to the already existing derivative
@@ -257,12 +258,12 @@ public function doImageStyleUrlAndPathTests($scheme, $clean_url = TRUE, $extra_s
         // (cf. http://www.libpng.org/pub/png/book/chapter08.html#png.ch08.div.2)
         // in the response body.
         $raw = $this->getSession()->getPage()->getContent();
-        $this->assertFalse(strpos($raw, chr(137) . chr(80) . chr(78) . chr(71) . chr(13) . chr(10) . chr(26) . chr(10)));
+        $this->assertStringNotContainsString(chr(137) . chr(80) . chr(78) . chr(71) . chr(13) . chr(10) . chr(26) . chr(10), $raw);
       }
     }
     else {
       $this->assertEqual($this->drupalGetHeader('Expires'), 'Sun, 19 Nov 1978 05:00:00 GMT', 'Expires header was sent.');
-      $this->assertEqual(strpos($this->drupalGetHeader('Cache-Control'), 'no-cache'), FALSE, 'Cache-Control header contains \'no-cache\' to prevent caching.');
+      $this->assertStringNotContainsString('no-cache', $this->drupalGetHeader('Cache-Control'), 'Cache-Control header contains \'no-cache\' to prevent caching.');
 
       if ($clean_url) {
         // Add some extra chars to the token.
@@ -292,7 +293,7 @@ public function doImageStyleUrlAndPathTests($scheme, $clean_url = TRUE, $extra_s
     $generated_uri = $this->style->buildUri($original_uri);
     $this->assertFalse(file_exists($generated_uri), 'Generated file does not exist.');
     $generate_url = $this->style->buildUrl($original_uri, $clean_url);
-    $this->assertIdentical(strpos($generate_url, IMAGE_DERIVATIVE_TOKEN . '='), FALSE, 'The security token does not appear in the image style URL.');
+    $this->assertStringNotContainsString(IMAGE_DERIVATIVE_TOKEN . '=', $generate_url, 'The security token does not appear in the image style URL.');
     $this->drupalGet($generate_url);
     $this->assertResponse(200, 'Image was accessible at the URL with a missing token.');
 

core/modules/image/tests/src/Kernel/ImageFormatterTest.php

@@ -154,9 +154,9 @@ public function testImageFormatterSvg() {
     $this->assertEquals('medium', $build[$this->fieldName][0]['#image_style']);
     // We check that the image URL contains the expected style directory
     // structure.
-    $this->assertTrue(strpos($build[$this->fieldName][0]['#markup'], 'styles/medium/public/test-image.png') !== FALSE);
-    $this->assertTrue(strpos($build[$this->fieldName][0]['#markup'], 'width="220"') !== FALSE);
-    $this->assertTrue(strpos($build[$this->fieldName][0]['#markup'], 'height="220"') !== FALSE);
+    $this->assertStringContainsString('styles/medium/public/test-image.png', $build[$this->fieldName][0]['#markup']);
+    $this->assertStringContainsString('width="220"', $build[$this->fieldName][0]['#markup']);
+    $this->assertStringContainsString('height="220"', $build[$this->fieldName][0]['#markup']);
 
     // The second image is an SVG, which is not supported by the GD toolkit.
     // The image style should still be applied with its cache tags, but image
@@ -167,11 +167,11 @@ public function testImageFormatterSvg() {
     $this->assertEquals('medium', $build[$this->fieldName][1]['#image_style']);
     // We check that the image URL does not contain the style directory
     // structure.
-    $this->assertFalse(strpos($build[$this->fieldName][1]['#markup'], 'styles/medium/public/test-image.svg'));
+    $this->assertStringNotContainsString('styles/medium/public/test-image.svg', $build[$this->fieldName][1]['#markup']);
     // Since we did not store original image dimensions, width and height
     // HTML attributes will not be present.
-    $this->assertFalse(strpos($build[$this->fieldName][1]['#markup'], 'width'));
-    $this->assertFalse(strpos($build[$this->fieldName][1]['#markup'], 'height'));
+    $this->assertStringNotContainsString('width', $build[$this->fieldName][1]['#markup']);
+    $this->assertStringNotContainsString('height', $build[$this->fieldName][1]['#markup']);
   }
 
   /**

core/modules/language/tests/src/Functional/LanguageNegotiationInfoTest.php

@@ -141,7 +141,7 @@ public function testInfoAlterations() {
 
     // Check that only the core language types are available.
     foreach ($this->languageManager()->getDefinedLanguageTypes() as $type) {
-      $this->assertTrue(strpos($type, 'test') === FALSE, new FormattableMarkup('The %type language is still available', ['%type' => $type]));
+      $this->assertStringNotContainsString('test', $type, new FormattableMarkup('The %type language is still available', ['%type' => $type]));
     }
 
     // Check that fixed language types are properly configured, even those

core/modules/language/tests/src/Kernel/EntityUrlLanguageTest.php

@@ -56,9 +56,9 @@ protected function setUp(): void {
    * Ensures that entity URLs in a language have the right language prefix.
    */
   public function testEntityUrlLanguage() {
-    $this->assertTrue(strpos($this->entity->toUrl()->toString(), '/en/entity_test/' . $this->entity->id()) !== FALSE);
-    $this->assertTrue(strpos($this->entity->getTranslation('es')->toUrl()->toString(), '/es/entity_test/' . $this->entity->id()) !== FALSE);
-    $this->assertTrue(strpos($this->entity->getTranslation('fr')->toUrl()->toString(), '/fr/entity_test/' . $this->entity->id()) !== FALSE);
+    $this->assertStringContainsString('/en/entity_test/' . $this->entity->id(), $this->entity->toUrl()->toString());
+    $this->assertStringContainsString('/es/entity_test/' . $this->entity->id(), $this->entity->getTranslation('es')->toUrl()->toString());
+    $this->assertStringContainsString('/fr/entity_test/' . $this->entity->id(), $this->entity->getTranslation('fr')->toUrl()->toString());
   }
 
   /**
@@ -89,9 +89,9 @@ public function testEntityUrlLanguageWithLanguageContentEnabled() {
     // The method language-content-entity should run before language-url and
     // append query parameter for the content language and prevent language-url
     // from overwriting the url.
-    $this->assertTrue(strpos($this->entity->toUrl('canonical')->toString(), '/en/entity_test/' . $this->entity->id() . '?' . LanguageNegotiationContentEntity::QUERY_PARAMETER . '=en') !== FALSE);
-    $this->assertTrue(strpos($this->entity->getTranslation('es')->toUrl('canonical')->toString(), '/en/entity_test/' . $this->entity->id() . '?' . LanguageNegotiationContentEntity::QUERY_PARAMETER . '=es') !== FALSE);
-    $this->assertTrue(strpos($this->entity->getTranslation('fr')->toUrl('canonical')->toString(), '/en/entity_test/' . $this->entity->id() . '?' . LanguageNegotiationContentEntity::QUERY_PARAMETER . '=fr') !== FALSE);
+    $this->assertStringContainsString('/en/entity_test/' . $this->entity->id() . '?' . LanguageNegotiationContentEntity::QUERY_PARAMETER . '=en', $this->entity->toUrl('canonical')->toString());
+    $this->assertStringContainsString('/en/entity_test/' . $this->entity->id() . '?' . LanguageNegotiationContentEntity::QUERY_PARAMETER . '=es', $this->entity->getTranslation('es')->toUrl('canonical')->toString());
+    $this->assertStringContainsString('/en/entity_test/' . $this->entity->id() . '?' . LanguageNegotiationContentEntity::QUERY_PARAMETER . '=fr', $this->entity->getTranslation('fr')->toUrl('canonical')->toString());
 
     // Define the method language-url with a higher priority than
     // language-content-entity. This configuration should match the default one,

core/modules/locale/tests/src/Functional/LocaleLocaleLookupTest.php

@@ -84,7 +84,7 @@ public function testFixOldPluralStyle($translation_value, $expected) {
     // Check that 'count[2]' was saved for source value.
     $translation = $string_storage->findTranslation(['language' => 'fr', 'lid' => $lid])->translation;
     $this->assertSame($translation_value, $translation, 'Source value not changed');
-    $this->assertNotFalse(strpos($translation, '@count[2]'), 'Source value contains @count[2]');
+    $this->assertStringContainsString('@count[2]', $translation, 'Source value contains @count[2]');
   }
 
   /**

core/modules/locale/tests/src/Unit/LocaleLookupTest.php

@@ -304,7 +304,12 @@ public function testFixOldPluralStyleTranslations($translations, $langcode, $str
       ->with('locale:' . $langcode . '::anonymous', FALSE);
 
     $locale_lookup = new LocaleLookup($langcode, '', $this->storage, $this->cache, $this->lock, $this->configFactory, $this->languageManager, $this->requestStack);
-    $this->assertSame($is_fix, strpos($locale_lookup->get($string), '@count[2]') === FALSE);
+    if ($is_fix) {
+      $this->assertStringNotContainsString('@count[2]', $locale_lookup->get($string));
+    }
+    else {
+      $this->assertStringContainsString('@count[2]', $locale_lookup->get($string));
+    }
   }
 
   /**

core/modules/node/tests/src/Functional/Views/PathPluginTest.php

@@ -84,7 +84,7 @@ public function testPathPlugin() {
     $output = $view->preview();
     $output = $renderer->renderRoot($output);
     foreach ($this->nodes as $node) {
-      $this->assertTrue(strpos($output, 'This is <strong>not escaped</strong> and this is ' . $node->toLink('the link')->toString()) !== FALSE, 'Make sure path field rewriting is not escaped.');
+      $this->assertStringContainsString('This is <strong>not escaped</strong> and this is ' . $node->toLink('the link')->toString(), $output, 'Make sure path field rewriting is not escaped.');
     }
   }
 

core/modules/node/tests/src/Functional/Views/RowPluginTest.php

@@ -79,8 +79,8 @@ public function testRowPlugin() {
     $output = $view->preview();
     $output = $renderer->renderRoot($output);
     foreach ($this->nodes as $node) {
-      $this->assertFalse(strpos($output, $node->body->summary) !== FALSE, 'Make sure the teaser appears in the output of the view.');
-      $this->assertTrue(strpos($output, $node->body->value) !== FALSE, 'Make sure the full text appears in the output of the view.');
+      $this->assertStringNotContainsString($node->body->summary, $output, 'Make sure the teaser appears in the output of the view.');
+      $this->assertStringContainsString($node->body->value, $output, 'Make sure the full text appears in the output of the view.');
     }
 
     // Test with teasers.
@@ -88,8 +88,8 @@ public function testRowPlugin() {
     $output = $view->preview();
     $output = $renderer->renderRoot($output);
     foreach ($this->nodes as $node) {
-      $this->assertTrue(strpos($output, $node->body->summary) !== FALSE, 'Make sure the teaser appears in the output of the view.');
-      $this->assertFalse(strpos($output, $node->body->value) !== FALSE, 'Make sure the full text does not appears in the output of the view if teaser is set as viewmode.');
+      $this->assertStringContainsString($node->body->summary, $output, 'Make sure the teaser appears in the output of the view.');
+      $this->assertStringNotContainsString($node->body->value, $output, 'Make sure the full text does not appears in the output of the view if teaser is set as viewmode.');
     }
   }
 

core/modules/quickedit/tests/src/FunctionalJavascript/QuickEditAutocompleteTermTest.php

@@ -165,8 +165,8 @@ public function testAutocompleteQuickEdit() {
     $tags = $tag_field->getValue();
 
     // Check existing terms.
-    $this->assertTrue(strpos($tags, $this->term1->label()) !== FALSE);
-    $this->assertTrue(strpos($tags, $this->term2->label()) !== FALSE);
+    $this->assertStringContainsString($this->term1->label(), $tags);
+    $this->assertStringContainsString($this->term2->label(), $tags);
 
     // Add new term.
     $new_tag = $this->randomMachineName();

core/modules/quickedit/tests/src/FunctionalJavascript/QuickEditLoadingTest.php

@@ -258,7 +258,7 @@ public function testDisplayOptions() {
     ];
     $build = $node->body->view($display_settings);
     $output = \Drupal::service('renderer')->renderRoot($build);
-    $this->assertFalse(strpos($output, 'data-quickedit-field-id'), 'data-quickedit-field-id attribute not added when rendering field using dynamic display options.');
+    $this->assertStringNotContainsString('data-quickedit-field-id', $output, 'data-quickedit-field-id attribute not added when rendering field using dynamic display options.');
   }
 
   /**

core/modules/rest/tests/src/Functional/ResourceTest.php

@@ -157,7 +157,7 @@ public function testUriPaths() {
 
     foreach ($manager->getDefinitions() as $resource => $definition) {
       foreach ($definition['uri_paths'] as $key => $uri_path) {
-        $this->assertFalse(strpos($uri_path, '//'), 'The resource URI path does not have duplicate slashes.');
+        $this->assertStringNotContainsString('//', $uri_path, 'The resource URI path does not have duplicate slashes.');
       }
     }
   }

core/modules/rest/tests/src/Functional/Views/StyleSerializerTest.php

@@ -652,7 +652,7 @@ public function testFieldapiField() {
     $node->save();
     $result = Json::decode($this->drupalGet('test/serialize/node-field', ['query' => ['_format' => 'json']]));
     $this->assertEqual($result[1]['nid'], $node->id());
-    $this->assertTrue(strpos($this->getSession()->getPage()->getContent(), "<script") === FALSE, "No script tag is present in the raw page contents.");
+    $this->assertStringNotContainsString("<script", $this->getSession()->getPage()->getContent(), "No script tag is present in the raw page contents.");
 
     $this->drupalLogin($this->adminUser);
 

core/modules/search/tests/src/Functional/SearchLanguageTest.php

@@ -115,7 +115,7 @@ public function testLanguages() {
     $url = $this->getUrl();
     $parts = parse_url($url);
     $query_string = isset($parts['query']) ? rawurldecode($parts['query']) : '';
-    $this->assertTrue(strpos($query_string, '=language:fr') !== FALSE, 'Language filter language:fr add to the query string.');
+    $this->assertStringContainsString('=language:fr', $query_string, 'Language filter language:fr add to the query string.');
 
     // Search for keyword node and language filter as Spanish.
     $edit = ['keys' => 'node', 'language[es]' => TRUE];

core/modules/search/tests/src/Kernel/SearchExcerptTest.php

@@ -53,12 +53,12 @@ public function testSearchExcerpt() {
     $longtext = str_repeat($text . ' ', 10);
     $result = $this->doSearchExcerpt('nothing', $longtext);
     $expected = 'The quick brown fox & jumps over the lazy dog';
-    $this->assertTrue(strpos($result, $expected) === 0, 'When keyword is not found in long string, return value starts as expected');
+    $this->assertStringStartsWith($expected, $result, 'When keyword is not found in long string, return value starts as expected');
 
     $entities = str_repeat('készítése ', 20);
     $result = $this->doSearchExcerpt('nothing', $entities);
-    $this->assertFalse(strpos($result, '&'), 'Entities are not present in excerpt');
-    $this->assertTrue(strpos($result, 'í') > 0, 'Entities are converted in excerpt');
+    $this->assertStringNotContainsString('&', $result, 'Entities are not present in excerpt');
+    $this->assertStringContainsString('í', $result, 'Entities are converted in excerpt');
 
     // The node body that will produce this rendered $text is:
     // 123456789 HTMLTest +123456789+‘  +‘  +‘  +‘  +12345678      +‘  +‘  +‘   ‘
@@ -85,37 +85,37 @@ public function testSearchExcerptSimplified() {
     // Note: The search_excerpt() function adds some extra spaces -- not
     // important for HTML formatting. Remove these for comparison.
     $result = $this->doSearchExcerpt('123456.7890', $text);
-    $this->assertTrue(strpos($result, 'Number: <strong>123456.7890</strong>') !== FALSE, 'Numeric keyword is highlighted with exact match');
+    $this->assertStringContainsString('Number: <strong>123456.7890</strong>', $result, 'Numeric keyword is highlighted with exact match');
 
     $result = $this->doSearchExcerpt('1234567890', $text);
-    $this->assertTrue(strpos($result, 'Number: <strong>123456.7890</strong>') !== FALSE, 'Numeric keyword is highlighted with simplified match');
+    $this->assertStringContainsString('Number: <strong>123456.7890</strong>', $result, 'Numeric keyword is highlighted with simplified match');
 
     $result = $this->doSearchExcerpt('Number 1234567890', $text);
-    $this->assertTrue(strpos($result, '<strong>Number</strong>: <strong>123456.7890</strong>') !== FALSE, 'Punctuated and numeric keyword is highlighted with simplified match');
+    $this->assertStringContainsString('<strong>Number</strong>: <strong>123456.7890</strong>', $result, 'Punctuated and numeric keyword is highlighted with simplified match');
 
     $result = $this->doSearchExcerpt('"Number 1234567890"', $text);
-    $this->assertTrue(strpos($result, '<strong>Number: 123456.7890</strong>') !== FALSE, 'Phrase with punctuated and numeric keyword is highlighted with simplified match');
+    $this->assertStringContainsString('<strong>Number: 123456.7890</strong>', $result, 'Phrase with punctuated and numeric keyword is highlighted with simplified match');
 
     $result = $this->doSearchExcerpt('"Hyphenated onetwo"', $text);
-    $this->assertTrue(strpos($result, '<strong>Hyphenated: one-two</strong>') !== FALSE, 'Phrase with punctuated and hyphenated keyword is highlighted with simplified match');
+    $this->assertStringContainsString('<strong>Hyphenated: one-two</strong>', $result, 'Phrase with punctuated and hyphenated keyword is highlighted with simplified match');
 
     $result = $this->doSearchExcerpt('"abc def"', $text);
-    $this->assertTrue(strpos($result, '<strong>abc,def</strong>') !== FALSE, 'Phrase with keyword simplified into two separate words is highlighted with simplified match');
+    $this->assertStringContainsString('<strong>abc,def</strong>', $result, 'Phrase with keyword simplified into two separate words is highlighted with simplified match');
 
     // Test phrases with characters which are being truncated.
     $result = $this->doSearchExcerpt('"ipsum _"', $text);
-    $this->assertTrue(strpos($result, '<strong>ipsum</strong>') !== FALSE, 'Only valid part of the phrase is highlighted and invalid part containing "_" is ignored.');
+    $this->assertStringContainsString('<strong>ipsum</strong>', $result, 'Only valid part of the phrase is highlighted and invalid part containing "_" is ignored.');
 
     $result = $this->doSearchExcerpt('"ipsum 0000"', $text);
-    $this->assertTrue(strpos($result, '<strong>ipsum</strong>') !== FALSE, 'Only valid part of the phrase is highlighted and invalid part "0000" is ignored.');
+    $this->assertStringContainsString('<strong>ipsum</strong>', $result, 'Only valid part of the phrase is highlighted and invalid part "0000" is ignored.');
 
     // Test combination of the valid keyword and keyword containing only
     // characters which are being truncated during simplification.
     $result = $this->doSearchExcerpt('ipsum _', $text);
-    $this->assertTrue(strpos($result, '<strong>ipsum</strong>') !== FALSE, 'Only valid keyword is highlighted and invalid keyword "_" is ignored.');
+    $this->assertStringContainsString('<strong>ipsum</strong>', $result, 'Only valid keyword is highlighted and invalid keyword "_" is ignored.');
 
     $result = $this->doSearchExcerpt('ipsum 0000', $text);
-    $this->assertTrue(strpos($result, '<strong>ipsum</strong>') !== FALSE, 'Only valid keyword is highlighted and invalid keyword "0000" is ignored.');
+    $this->assertStringContainsString('<strong>ipsum</strong>', $result, 'Only valid keyword is highlighted and invalid keyword "0000" is ignored.');
 
     // Test using the hook_search_preprocess() from the test module.
     // The hook replaces "finding" or "finds" with "find".
@@ -123,54 +123,54 @@ public function testSearchExcerptSimplified() {
     // highlight "finding".
     $text = "this tests finding a string";