[DomCrawler][FrameworkBundle] Add assertSelectorCount

Author: alamirault

testing.rst

@@ -1020,6 +1020,8 @@ Crawler Assertions
 ``assertSelectorExists(string $selector, string $message = '')``/``assertSelectorNotExists(string $selector, string $message = '')``
     Asserts that the given selector does (not) match at least one element
     in the response.
+``assertSelectorCount(int $expectedCount, string $selector, string $message = '')``
+    Asserts that the expected number of selector elements are in the response
 ``assertSelectorTextContains(string $selector, string $text, string $message = '')``/``assertSelectorTextNotContains(string $selector, string $text, string $message = '')``
     Asserts that the first element matching the given selector does (not)
     contain the expected text.
@@ -1039,6 +1041,10 @@ Crawler Assertions
     Asserts that value of the field of the first form matching the given
     selector does (not) equal the expected value.
 
+.. versionadded:: 6.3
+
+    The ``assertSelectorCount()`` method was introduced in Symfony 6.3.
+
 Mailer Assertions
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