Adding test framework and Unit test for Core functionality:

*Added first test with Junit
*Added core test with Junit
*Updated CONTRIBUTING.md with testing instruction

CONTRIBUTING.md

@@ -52,6 +52,23 @@ java -jar out\artifacts\ssgApplication_jar\ssgApplication.jar -c <configFileName
 >2. Install and enable the plugin
 >3. Reformat the Code by "CTRL+ALT+L" in the file you worked on
 
+### Testing
+
+To test the code :
+1. Run "testProcessInput" in HTMLBuilderTest.java
+
+2. Fix any error that does not pass the testing
+
+3. Click [here](https://junit.org/junit5/docs/current/user-guide/) for more information for Junit testing framework
+
+To create a unit test :
+
+Right click the class name in the code, and select Show Context Action
+Select >Create Test< and select the function you want to add
+Add testing to the corresponding testclass
+
+
+
 ### Fix Linter
 
 >1. Run ```mvn spotbugs:gui``` to spot the area of improvement in a SpotBug UI

pom.xml

@@ -45,6 +45,18 @@
             <version>4.13.2</version>
             <scope>compile</scope>
         </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>3.12.0</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>commons-io</groupId>
+            <artifactId>commons-io</artifactId>
+            <version>20030203.000550</version>
+            <scope>compile</scope>
+        </dependency>
     </dependencies>
 
 

src/main/java/com/company/HTMLBuilder.java

@@ -11,7 +11,7 @@
 
 public class HTMLBuilder {
 
-    static void processInput(String inputFile, String output) {
+    public static void processInput(String inputFile, String output) {
         if (inputFile.endsWith(".txt")) {
             //Single file
             File file = new File(inputFile);
@@ -39,7 +39,7 @@ static void processInput(String inputFile, String output) {
         }
     }
 
-    static String fileNameReader(String[] str) {
+    public static String fileNameReader(String[] str) {
         //convert string array to string with the space
         StringBuilder s = new StringBuilder();
         for (String arg : str) {

src/test/java/HTMLBuilderTest.java

@@ -1,22 +1,35 @@
+import com.company.HTMLBuilder;
 import org.junit.jupiter.api.Test;
+import org.apache.commons.io.FileUtils;
+
+import java.io.File;
+import java.io.IOException;
 
 import static org.junit.jupiter.api.Assertions.*;
 
 class HTMLBuilderTest {
 
     @Test
-    void processInput() {
+    void testProcessInput() throws IOException {
+        HTMLBuilder.processInput("sources/Sample.txt","testDir");
+        File target = new File("dist/Sample.html");
+        assertTrue(FileUtils.contentEquals(target,new File("testDir/Sample.html")));
     }
 
     @Test
-    void fileNameReader() {
+    void testFileNameReader() {
+        String[] fileName1 = {"example", "file", "name.txt"};
+        assertEquals("example file name.txt",HTMLBuilder.fileNameReader(fileName1));
+
+        String[] fileName2 = {"sample.md"};
+        assertEquals("sample.md",HTMLBuilder.fileNameReader(fileName2));
     }
 
     @Test
-    void writeHtmlHeader() {
+    void testWriteHtmlHeader() {
     }
 
     @Test
-    void writeHtmlFoot() {
+    void testWriteHtmlFoot() {
     }
 }

src/test/java/com/company/TextUtilsTest.java

@@ -0,0 +1,34 @@
+package com.company;
+
+import org.junit.jupiter.api.Test;
+
+import java.io.*;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class TextUtilsTest {
+
+    @Test
+    void createHtmlFromTxt() throws IOException {
+        File targetText = new File("/testDir/targetText.txt");
+        File txtFile = new File("/testDir/sample.txt");
+        File htmlFile = new File("/testDir/sample.html");
+        htmlFile.createNewFile();
+        BufferedWriter writeSample = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(txtFile), "UTF-8"));
+        writeSample.write("This is a Title of the Sample Text");
+        writeSample.newLine();
+        writeSample.newLine();
+        writeSample.write("First Paragraph.");
+        writeSample.write("This is a sample test");
+        writeSample.newLine();
+        writeSample.write("2. Sample text");
+        writeSample.newLine();
+        writeSample.close();
+
+        TextUtils.createHtmlFromTxt(txtFile,"");
+
+
+        BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream("testDir/sample.html"), "UTF-8"));
+        System.out.println(reader.readLine());
+    }
+}

testDir/sample.txt

@@ -0,0 +1,4 @@
+This is a Title of the Sample Text
+
+First Paragraph.This is a sample test
+2. Sample text