BAEL-5253 moving the tests to other module

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

@@ -0,0 +1,32 @@
+package com.baeldung.isuppercase;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+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 StringFirstCharacterUppercase {
+
+    @Test
+    public void givenString_whenCheckingWithCharacterIsUpperCase_thenStringCapitalized() {
+        String example = "Katie";
+        Assertions.assertTrue(Character.isUpperCase(example.charAt(0)));
+    }
+
+    @Test
+    public void givenString_whenCheckingWithRegex_thenStringCapitalized() {
+        String example = "Katie";
+        String regEx = "[A-Z]\\w*";
+        assertThat(example, matchesPattern(regEx));
+    }
+
+    @Test
+    public void givenString_whenCheckingWithGuava_thenStringCapitalized() {
+        String example = "Katie";
+        Assertions.assertTrue(Ascii.isUpperCase(example.charAt(0)));
+    }
+}