[BAEL-6436_printQuotesAroundString] Print "" Quotes Around a String in Java (#13925)

core-java-modules/core-java-string-operations-5/src/test/java/com/baeldung/stringwithquotes/PrintQuotesAroundAStringUnitTest.java

@@ -0,0 +1,60 @@
+package com.baeldung.stringwithquotes;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+public class PrintQuotesAroundAStringUnitTest {
+    private final ByteArrayOutputStream outContent = new ByteArrayOutputStream();
+    private final PrintStream originalOut = System.out;
+
+    @BeforeEach
+    void replaceOut() {
+        System.setOut(new PrintStream(outContent));
+    }
+
+    @AfterEach
+    void restoreOut() {
+        System.setOut(originalOut);
+    }
+
+    @Test
+    void whenWrappingAStringWithEscapedQuote_thenGetExpectedResult() {
+        String theySay = "All Java programmers are cute!";
+        String quoted = "\"" + theySay + "\"";
+
+        System.out.println(quoted);
+
+        //assertion
+        String expected = "\"All Java programmers are cute!\"\n";
+        assertEquals(expected, outContent.toString());
+    }
+
+    @Test
+    void whenCallingReplaceAll_thenGetExpectedResult() {
+        String theySay = "Can you write Java code?";
+        String quoted = theySay.replaceAll("^|$", "\"");
+
+        System.out.println(quoted);
+
+        //assertion
+        String expected = "\"Can you write Java code?\"\n";
+        assertEquals(expected, outContent.toString());
+    }
+
+    @Test
+    void whenWrappingAStringWithQuoteChar_thenGetExpectedResult() {
+        String weSay = "Yes, we can write beautiful Java codes!";
+        String quoted = '"' + weSay + '"';
+        System.out.println(quoted);
+
+        //assertion
+        String expected = "\"Yes, we can write beautiful Java codes!\"\n";
+        assertEquals(expected, outContent.toString());
+    }
+}