updated unit test cases so that build doesn't generate un-committed files

.gitignore

@@ -85,3 +85,5 @@ transaction.log
 *-shell.log
 
 apache-cxf/cxf-aegis/baeldung.xml
+
+libraries-2/*.db

algorithms-miscellaneous-2/src/test/java/com/baeldung/jgrapht/GraphImageGenerationUnitTest.java

@@ -1,16 +1,21 @@
 package com.baeldung.jgrapht;
 
 import static org.junit.Assert.assertTrue;
+
 import java.awt.Color;
 import java.awt.image.BufferedImage;
 import java.io.File;
 import java.io.IOException;
+
 import javax.imageio.ImageIO;
+
 import org.jgrapht.ext.JGraphXAdapter;
 import org.jgrapht.graph.DefaultDirectedGraph;
 import org.jgrapht.graph.DefaultEdge;
+import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
+
 import com.mxgraph.layout.mxCircleLayout;
 import com.mxgraph.layout.mxIGraphLayout;
 import com.mxgraph.util.mxCellRenderer;
@@ -20,7 +25,7 @@ public class GraphImageGenerationUnitTest {
 
     @Before
     public void createGraph() throws IOException {
-        File imgFile = new File("src/test/resources/graph.png");
+        File imgFile = new File("src/test/resources/graph1.png");
         imgFile.createNewFile();
         g = new DefaultDirectedGraph<String, DefaultEdge>(DefaultEdge.class);
         String x1 = "x1";
@@ -34,12 +39,18 @@ public class GraphImageGenerationUnitTest {
         g.addEdge(x3, x1);
     }
 
+    @After
+    public void cleanup() {
+        File imgFile = new File("src/test/resources/graph1.png");
+        imgFile.deleteOnExit();
+    }
+
     @Test
     public void givenAdaptedGraph_whenWriteBufferedImage_ThenFileShouldExist() throws IOException {
         JGraphXAdapter<String, DefaultEdge> graphAdapter = new JGraphXAdapter<String, DefaultEdge>(g);
         mxIGraphLayout layout = new mxCircleLayout(graphAdapter);
         layout.execute(graphAdapter.getDefaultParent());
-        File imgFile = new File("src/test/resources/graph.png");
+        File imgFile = new File("src/test/resources/graph1.png");
         BufferedImage image = mxCellRenderer.createBufferedImage(graphAdapter, null, 2, Color.WHITE, true, null);
         ImageIO.write(image, "PNG", imgFile);
         assertTrue(imgFile.exists());

jackson-modules/jackson-conversions-2/src/test/java/com/baeldung/jackson/csv/CsvUnitTest.java

@@ -7,48 +7,59 @@ import java.io.IOException;
 import java.nio.charset.Charset;
 import java.util.List;
 
+import org.junit.After;
+import org.junit.Before;
 import org.junit.Test;
 
 import com.fasterxml.jackson.core.JsonParseException;
 import com.fasterxml.jackson.databind.JsonMappingException;
 import com.google.common.io.Files;
 
-
 public class CsvUnitTest {
 
+    private File csvFromJson;
+    private File jsonFromCsv;
+    private File formattedCsvFromJson;
+    
+    @Before
+    public void setup() {
+        csvFromJson = new File("src/main/resources/csv/csvFromJson.csv");
+        jsonFromCsv = new File("src/main/resources/csv/jsonFromCsv.json");
+        formattedCsvFromJson = new File("src/main/resources/csv/formattedCsvFromJson.csv");
+    }
+
+    @After
+    public void cleanup() {
+        csvFromJson.deleteOnExit();
+        jsonFromCsv.deleteOnExit();
+        formattedCsvFromJson.deleteOnExit();
+    }
+
     @Test
     public void givenJsonInput_thenWriteCsv() throws JsonParseException, JsonMappingException, IOException {
-        JsonCsvConverter.JsonToCsv(new File("src/main/resources/csv/orderLines.json"),
-            new File("src/main/resources/csv/csvFromJson.csv"));
-        
-        assertEquals(readFile("src/main/resources/csv/csvFromJson.csv"),
-            readFile("src/test/resources/csv/expectedCsvFromJson.csv"));
+        JsonCsvConverter.JsonToCsv(new File("src/main/resources/csv/orderLines.json"), csvFromJson);
+
+        assertEquals(readFile(csvFromJson.getAbsolutePath()), readFile("src/test/resources/csv/expectedCsvFromJson.csv"));
     }
-    
+
     @Test
     public void givenCsvInput_thenWritesJson() throws JsonParseException, JsonMappingException, IOException {
-        JsonCsvConverter.csvToJson(new File("src/main/resources/csv/orderLines.csv"),
-            new File("src/main/resources/csv/jsonFromCsv.json"));
-        
-        assertEquals(readFile("src/main/resources/csv/jsonFromCsv.json"),
-            readFile("src/test/resources/csv/expectedJsonFromCsv.json"));
-        
+        JsonCsvConverter.csvToJson(new File("src/main/resources/csv/orderLines.csv"), jsonFromCsv);
+
+        assertEquals(readFile(jsonFromCsv.getAbsolutePath()), readFile("src/test/resources/csv/expectedJsonFromCsv.json"));
+
     }
-    
+
     @Test
     public void givenJsonInput_thenWriteFormattedCsvOutput() throws JsonParseException, JsonMappingException, IOException {
-        JsonCsvConverter.JsonToFormattedCsv(new File("src/main/resources/csv/orderLines.json"),
-            new File("src/main/resources/csv/formattedCsvFromJson.csv"));
+        JsonCsvConverter.JsonToFormattedCsv(new File("src/main/resources/csv/orderLines.json"), formattedCsvFromJson);
+
+        assertEquals(readFile(formattedCsvFromJson.getAbsolutePath()), readFile("src/test/resources/csv/expectedFormattedCsvFromJson.csv"));
 
-        assertEquals(readFile("src/main/resources/csv/formattedCsvFromJson.csv"),
-            readFile("src/test/resources/csv/expectedFormattedCsvFromJson.csv"));
-        
     }
-    
+
     private List<String> readFile(String filename) throws IOException {
         return Files.readLines(new File(filename), Charset.forName("utf-8"));
     }
-    
-    
-}
-;
+
+};

jackson-modules/jackson-conversions-2/src/test/java/com/baeldung/jackson/yaml/YamlUnitTest.java

@@ -12,6 +12,7 @@ import java.time.format.DateTimeFormatter;
 import java.util.ArrayList;
 import java.util.List;
 
+import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -25,12 +26,19 @@ import com.fasterxml.jackson.dataformat.yaml.YAMLGenerator.Feature;
 
 public class YamlUnitTest {
     private ObjectMapper mapper;
+    private File orderOutput;
 
     @Before
     public void setup() {
         mapper = new ObjectMapper(new YAMLFactory().disable(Feature.WRITE_DOC_START_MARKER));
         mapper.findAndRegisterModules();
         mapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
+        orderOutput = new File("src/test/resources/yaml/orderOutput.yaml");
+    }
+    
+    @After
+    public void cleanup() {
+        orderOutput.deleteOnExit();
     }
 
     @Test
@@ -53,9 +61,9 @@ public class YamlUnitTest {
             LocalDate.parse("2019-04-18", DateTimeFormatter.ISO_DATE), 
             "Customer, Jane", 
             lines);
-        mapper.writeValue(new File("src/test/resources/yaml/orderOutput.yaml"), order);
+        mapper.writeValue(orderOutput, order);
 
-        File outputYaml = new File("src/test/resources/yaml/orderOutput.yaml");
+        File outputYaml = new File(orderOutput.getAbsolutePath());
         assertTrue(outputYaml.exists());
     }
 }

libraries-data-2/src/test/java/com/baeldung/univocity/ParsingServiceUnitTest.java

@@ -2,15 +2,26 @@ package com.baeldung.univocity;
 
 import static org.junit.Assert.assertEquals;
 
+import java.io.File;
 import java.util.ArrayList;
 import java.util.List;
 
+import org.junit.After;
 import org.junit.Test;
 
 import com.baeldung.univocity.model.Product;
 
 public class ParsingServiceUnitTest {
 
+    @After
+    public void cleanup() {
+        File csvFile = new File("src/test/resources/outputProductList.csv");
+        csvFile.deleteOnExit();
+        
+        File textFile = new File("src/test/resources/outputProductList.txt");
+        textFile.deleteOnExit();
+    }
+    
     @Test
     public void givenCsvFile_thenParsedResultsShouldBeReturned() {
         ParsingService parsingService = new ParsingService();