From 992716d7ff2bca8076c7b890716ecb4d0d7ba42b Mon Sep 17 00:00:00 2001
From: Andrei Branza <andrei.branza@yahoo.com>
Date: Sun, 24 Mar 2024 15:59:14 +0200
Subject: [PATCH] BAEL-6421 | Added necessary tests for the PrintWriter write
 vs print method article

---
 core-java-modules/core-java-io-apis-2/pom.xml |  10 ++
 .../WriteVsPrintUnitTest.java                 | 113 ++++++++++++++++++
 2 files changed, 123 insertions(+)
 create mode 100644 core-java-modules/core-java-io-apis-2/src/test/java/com/baeldung/printwriterwritevsprint/WriteVsPrintUnitTest.java

diff --git a/core-java-modules/core-java-io-apis-2/pom.xml b/core-java-modules/core-java-io-apis-2/pom.xml
index 89ab6d163a..a7362582ff 100644
--- a/core-java-modules/core-java-io-apis-2/pom.xml
+++ b/core-java-modules/core-java-io-apis-2/pom.xml
@@ -85,6 +85,16 @@
 
     <build>
         <finalName>core-java-io-apis-2</finalName>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>9</source>
+                    <target>9</target>
+                </configuration>
+            </plugin>
+        </plugins>
         <resources>
             <resource>
                 <directory>src/main/resources</directory>
diff --git a/core-java-modules/core-java-io-apis-2/src/test/java/com/baeldung/printwriterwritevsprint/WriteVsPrintUnitTest.java b/core-java-modules/core-java-io-apis-2/src/test/java/com/baeldung/printwriterwritevsprint/WriteVsPrintUnitTest.java
new file mode 100644
index 0000000000..8995e65318
--- /dev/null
+++ b/core-java-modules/core-java-io-apis-2/src/test/java/com/baeldung/printwriterwritevsprint/WriteVsPrintUnitTest.java
@@ -0,0 +1,113 @@
+package com.baeldung.printwriterwritevsprint;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import java.io.*;
+import java.util.*;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class WriteVsPrintUnitTest {
+
+    Object outputFromPrintWriter;
+    public Object outputFromPrintWriter() {
+        try (BufferedReader br = new BufferedReader(new FileReader("output.txt"))){
+            outputFromPrintWriter = br.readLine();
+        } catch (IOException e){
+            e.printStackTrace();
+            Assertions.fail();
+        }
+        return outputFromPrintWriter;
+    }
+
+    @Test
+    public void whenUsingWriteInt_thenASCIICharacterIsPrinted() throws FileNotFoundException {
+
+        PrintWriter printWriter = new PrintWriter("output.txt");
+
+        printWriter.write(48);
+        printWriter.close();
+
+        assertEquals("0", outputFromPrintWriter());
+    }
+
+    @Test
+    public void whenUsingWriteCharArrayFromOffset_thenCharArrayIsPrinted() throws FileNotFoundException {
+
+        PrintWriter printWriter = new PrintWriter("output.txt");
+
+        printWriter.write(new char[]{'A','/','&','4','E'}, 1, 4 );
+        printWriter.close();
+
+        assertEquals("/&4E", outputFromPrintWriter());
+    }
+
+    @Test
+    public void whenUsingWriteStringFromOffset_thenLengthOfStringIsPrinted() throws FileNotFoundException {
+
+        PrintWriter printWriter = new PrintWriter("output.txt");
+
+        printWriter.write("StringExample", 6, 7 );
+        printWriter.close();
+
+        assertEquals("Example", outputFromPrintWriter());
+    }
+
+    @Test
+    public void whenUsingPrintBoolean_thenStringValueIsPrinted() throws FileNotFoundException {
+
+        PrintWriter printWriter = new PrintWriter("output.txt");
+
+        printWriter.print(true);
+        printWriter.close();
+
+        assertEquals("true", outputFromPrintWriter());
+    }
+
+    @Test
+    public void whenUsingPrintChar_thenCharIsPrinted() throws FileNotFoundException {
+
+        PrintWriter printWriter = new PrintWriter("output.txt");
+
+        printWriter.print('A');
+        printWriter.close();
+
+        assertEquals("A", outputFromPrintWriter());
+    }
+
+    @Test
+    public void whenUsingPrintInt_thenValueOfIntIsPrinted() throws FileNotFoundException {
+
+        PrintWriter printWriter = new PrintWriter("output.txt");
+
+        printWriter.print(420);
+        printWriter.close();
+
+        assertEquals("420", outputFromPrintWriter());
+    }
+
+    @Test
+    public void whenUsingPrintString_thenStringIsPrinted() throws FileNotFoundException {
+
+        PrintWriter printWriter = new PrintWriter("output.txt");
+
+        printWriter.print("RandomString");
+        printWriter.close();
+
+        assertEquals("RandomString", outputFromPrintWriter());
+    }
+
+    @Test
+    public void whenUsingPrintObject_thenObjectToStringIsPrinted() throws FileNotFoundException {
+
+        PrintWriter printWriter = new PrintWriter("output.txt");
+
+        Map example = new HashMap();
+
+        printWriter.print(example);
+        printWriter.close();
+
+        assertEquals(example.toString(), outputFromPrintWriter());
+    }
+}
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