Andrei Branza - moved code for article to new module

core-java-modules/core-java-io-5/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;
+    Object outputFromPrintWriter() {
+        try (BufferedReader br = new BufferedReader(new FileReader("output.txt"))){
+            outputFromPrintWriter = br.readLine();
+        } catch (IOException e){
+            e.printStackTrace();
+            Assertions.fail();
+        }
+        return outputFromPrintWriter;
+    }
+
+    @Test
+    void whenUsingWriteInt_thenASCIICharacterIsPrinted() throws FileNotFoundException {
+
+        PrintWriter printWriter = new PrintWriter("output.txt");
+
+        printWriter.write(48);
+        printWriter.close();
+
+        assertEquals("0", outputFromPrintWriter());
+    }
+
+    @Test
+    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
+    void whenUsingWriteStringFromOffset_thenLengthOfStringIsPrinted() throws FileNotFoundException {
+
+        PrintWriter printWriter = new PrintWriter("output.txt");
+
+        printWriter.write("StringExample", 6, 7 );
+        printWriter.close();
+
+        assertEquals("Example", outputFromPrintWriter());
+    }
+
+    @Test
+    void whenUsingPrintBoolean_thenStringValueIsPrinted() throws FileNotFoundException {
+
+        PrintWriter printWriter = new PrintWriter("output.txt");
+
+        printWriter.print(true);
+        printWriter.close();
+
+        assertEquals("true", outputFromPrintWriter());
+    }
+
+    @Test
+    void whenUsingPrintChar_thenCharIsPrinted() throws FileNotFoundException {
+
+        PrintWriter printWriter = new PrintWriter("output.txt");
+
+        printWriter.print('A');
+        printWriter.close();
+
+        assertEquals("A", outputFromPrintWriter());
+    }
+
+    @Test
+    void whenUsingPrintInt_thenValueOfIntIsPrinted() throws FileNotFoundException {
+
+        PrintWriter printWriter = new PrintWriter("output.txt");
+
+        printWriter.print(420);
+        printWriter.close();
+
+        assertEquals("420", outputFromPrintWriter());
+    }
+
+    @Test
+    void whenUsingPrintString_thenStringIsPrinted() throws FileNotFoundException {
+
+        PrintWriter printWriter = new PrintWriter("output.txt");
+
+        printWriter.print("RandomString");
+        printWriter.close();
+
+        assertEquals("RandomString", outputFromPrintWriter());
+    }
+
+    @Test
+    void whenUsingPrintObject_thenObjectToStringIsPrinted() throws FileNotFoundException {
+
+        PrintWriter printWriter = new PrintWriter("output.txt");
+
+        Map example = new HashMap();
+
+        printWriter.print(example);
+        printWriter.close();
+
+        assertEquals(example.toString(), outputFromPrintWriter());
+    }
+}