Merge pull request eugenp#11538 from Teica/fix-5227

Fix 5227

Author: lor6

core-java-modules/core-java-string-algorithms-3/src/test/java/com/baeldung/isuppercase/StringFirstCharacterUppercaseUnitTest.java

@@ -5,9 +5,6 @@
 import org.junit.jupiter.api.TestInstance;
 import com.google.common.base.Ascii;
 
-import static org.hamcrest.MatcherAssert.assertThat;
-import static org.hamcrest.Matchers.matchesPattern;
-
 @TestInstance(TestInstance.Lifecycle.PER_CLASS)
 public class StringFirstCharacterUppercaseUnitTest {
 
@@ -21,7 +18,8 @@ public void givenString_whenCheckingWithCharacterIsUpperCase_thenStringCapitaliz
     public void givenString_whenCheckingWithRegex_thenStringCapitalized() {
         String example = "Katie";
         String regEx = "[A-Z]\\w*";
-        assertThat(example, matchesPattern(regEx));
+
+        Assertions.assertTrue(example.matches(regEx));
     }
 
     @Test