BAEL-255 - adding additional read file methods

core-java-8/src/test/java/com/baeldung/file/FileOperationsTest.java

@@ -1,17 +1,24 @@
 package com.baeldung.file;
 
-import org.hamcrest.Matchers;
-import org.junit.Assert;
-import org.junit.Test;
-
 import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.net.URL;
 import java.net.URLConnection;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.function.Consumer;
+import java.util.stream.Stream;
 
-import static org.hamcrest.CoreMatchers.containsString;
+import org.apache.commons.io.FileUtils;
+import org.hamcrest.CoreMatchers;
+import org.hamcrest.Matchers;
+import org.junit.Assert;
+import org.junit.Test;
 
 public class FileOperationsTest {
 
@@ -20,34 +27,22 @@ public class FileOperationsTest {
         String expectedData = "Hello World from fileTest.txt!!!";
 
         ClassLoader classLoader = getClass().getClassLoader();
-        InputStream inputStream = classLoader.getResourceAsStream("fileTest.txt");
+        File file = new File(classLoader.getResource("fileTest.txt").getFile());
+        InputStream inputStream = new FileInputStream(file);
         String data = readFromInputStream(inputStream);
-
-        Assert.assertThat(data, containsString(expectedData));
-}
-
-    @Test
-    public void givenFileNameAsAbsolutePath_whenUsingClasspath_thenFileData() throws IOException {
-        String expectedData = "Hello World from fileTest.txt!!!";
-
-        Class clazz = FileOperationsTest.class;
-        InputStream inputStream = clazz.getResourceAsStream("/fileTest.txt");
-        String data = readFromInputStream(inputStream);
-
-        Assert.assertThat(data, containsString(expectedData));
+        
+        Assert.assertEquals(expectedData, data.trim());
     }
 
     @Test
-    public void givenURLName_whenUsingURL_thenFileData() throws IOException {
-        String expectedData = "Baeldung";
-
-        URL urlObject = new URL("http://www.baeldung.com/");
-        URLConnection urlConnection = urlObject.openConnection();
-
-        InputStream inputStream = urlConnection.getInputStream();
+    public void givenFileNameAsAbsolutePath_whenUsingClasspath_thenFileData() throws IOException {
+        String expectedData = "Hello World from fileTest_2.txt!!!";
+        
+        Class clazz = FileOperationsTest.class;
+        InputStream inputStream = clazz.getResourceAsStream("/fileTest_2.txt");
         String data = readFromInputStream(inputStream);
 
-        Assert.assertThat(data, containsString(expectedData));
+        Assert.assertEquals(expectedData, data.trim());
     }
 
     @Test
@@ -58,9 +53,80 @@ public class FileOperationsTest {
         InputStream inputStream = clazz.getResourceAsStream("/LICENSE.txt");
         String data = readFromInputStream(inputStream);
 
-        Assert.assertThat(data, containsString(expectedData));
+        Assert.assertThat(data.trim(), CoreMatchers.containsString(expectedData));
     }
 
+    /*@Test
+    public void givenFileName_whenUsingJarFile_thenFileData() throws IOException {
+        String expectedData = "BSD License";
+
+        Class clazz = Matchers.class;
+        ClassLoader classLoader = clazz.getClassLoader();
+        InputStream inputStream = classLoader.getResourceAsStream("LICENSE.txt");
+        String data = readFromInputStream(inputStream);
+
+        Assert.assertThat(data.trim(), CoreMatchers.containsString(expectedData));
+    }*/
+
+    @Test
+    public void givenURLName_whenUsingURL_thenFileData() throws IOException {
+        String expectedData = "Baeldung";
+
+        URL urlObject = new URL("http://www.baeldung.com/");
+
+        URLConnection urlConnection = urlObject.openConnection();
+
+        InputStream inputStream = urlConnection.getInputStream();
+        String data = readFromInputStream(inputStream);
+
+        Assert.assertThat(data.trim(), CoreMatchers.containsString(expectedData));
+    }
+    
+    @Test
+    public void givenFileName_whenUsingFileUtils_thenFileData() throws IOException {
+        String expectedData = "Hello World from fileTest.txt!!!";
+        
+        ClassLoader classLoader = getClass().getClassLoader();
+        File file = new File(classLoader.getResource("fileTest.txt").getFile());
+        String data = FileUtils.readFileToString(file);
+        
+        Assert.assertEquals(expectedData, data.trim());
+    }
+    
+    @Test
+    public void givenFilePath_whenUsingFilesReadAllBytes_thenFileData() throws IOException {
+        String expectedData = "Hello World from fileTest.txt!!!";
+        
+        ClassLoader classLoader = getClass().getClassLoader();
+        File file = new File(classLoader.getResource("fileTest.txt").getFile());
+        Path path = Paths.get(file.getAbsolutePath());
+        
+        byte[] fileBytes = Files.readAllBytes(path);
+        String data = new String(fileBytes);
+
+        Assert.assertEquals(expectedData, data.trim());
+    }
+    
+    @Test
+    public void givenFilePath_whenUsingFilesLines_thenFileData() throws IOException {
+        String expectedData = "Hello World from fileTest.txt!!!";
+        
+        ClassLoader classLoader = getClass().getClassLoader();
+        File file = new File(classLoader.getResource("fileTest.txt").getFile());
+        Path path = Paths.get(file.getAbsolutePath());
+        
+        StringBuilder data = new StringBuilder();
+        Stream<String> lines = Files.lines(path);
+        lines.forEach(new Consumer<String>() {
+            @Override
+            public void accept(String line) {
+                data.append(line).append("\n");
+            }
+        });
+        
+        Assert.assertEquals(expectedData, data.toString().trim());
+    }
+    
     private String readFromInputStream(InputStream inputStream) throws IOException {
         InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
         BufferedReader bufferedReader = new BufferedReader(inputStreamReader);