SONARJAVA-6180 Fix FP on S5853 when "element" is called after "assertThat" (#5502)

Co-authored-by: rombirli <56340680+rombirli@users.noreply.github.com>

Author: aurelien-coet-sonarsource

java-checks-test-sources/default/src/test/java/checks/tests/AssertJConsecutiveAssertionCheckSample.java

@@ -191,6 +191,11 @@ void assert_on_member_select_2() {
     assertThat(myList.get(1)).isEqualTo("42");
   }
 
+  @Test
+  void assert_on_element() {
+    assertThat(myList).isNotNull().hasSize(2).element(0).isEqualTo("42"); // Compliant, assertions following the call to 'element' apply on a specific element
+    assertThat(myList).element(1).isEqualTo("10");
+  }
 
   @Test
   void assert_on_member_select_3() {

java-checks/src/main/java/org/sonar/java/checks/tests/AssertJConsecutiveAssertionCheck.java

@@ -54,7 +54,7 @@ public class AssertJConsecutiveAssertionCheck extends IssuableSubscriptionVisito
   public static final MethodMatchers ASSERTJ_SET_CONTEXT_METHODS = MethodMatchers.create()
     .ofSubTypes("org.assertj.core.api.AbstractAssert")
     .name(name -> name.startsWith("extracting") || name.startsWith("using") || name.startsWith("filtered")
-      || "flatExtracting".equals(name) || "map".equals(name) || "flatMap".equals(name))
+      || "flatExtracting".equals(name) || "map".equals(name) || "flatMap".equals(name) || "element".equals(name))
     .withAnyParameters()
     .build();