Simplify file creation in ResetCommandTest

Use existing test utility methods instead of nested PrintWriter usage.

Change-Id: I324852c7971ae644fa499f377a31d1cf265c7fd9
Signed-off-by: René Scheibe <rene.scheibe@gmail.com>

org.eclipse.jgit.test/tst/org/eclipse/jgit/api/ResetCommandTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2011-2013, Chris Aniszczyk <caniszczyk@gmail.com>
+ * Copyright (C) 2011-2018, Chris Aniszczyk <caniszczyk@gmail.com>
  * and other copyright owners as documented in the project's IP log.
  *
  * This program and the accompanying materials are made available
@@ -52,7 +52,6 @@ import static org.junit.Assert.fail;
 
 import java.io.File;
 import java.io.IOException;
-import java.io.PrintWriter;
 
 import org.eclipse.jgit.api.ResetCommand.ResetType;
 import org.eclipse.jgit.api.errors.GitAPIException;
@@ -94,45 +93,25 @@ public class ResetCommandTest extends RepositoryTestCase {
 		git = new Git(db);
 		initialCommit = git.commit().setMessage("initial commit").call();
 
+		// create file
+		indexFile = writeTrashFile("a.txt", "content");
+
 		// create nested file
-		File dir = new File(db.getWorkTree(), "dir");
-		FileUtils.mkdir(dir);
-		File nestedFile = new File(dir, "b.txt");
-		FileUtils.createNewFile(nestedFile);
-
-		try (PrintWriter nestedFileWriter = new PrintWriter(nestedFile)) {
-			nestedFileWriter.print("content");
-			nestedFileWriter.flush();
-
-			// create file
-			indexFile = new File(db.getWorkTree(), "a.txt");
-			FileUtils.createNewFile(indexFile);
-			try (PrintWriter writer = new PrintWriter(indexFile)) {
-				writer.print("content");
-				writer.flush();
-
-				// add file and commit it
-				git.add().addFilepattern("dir").addFilepattern("a.txt").call();
-				secondCommit = git.commit()
-						.setMessage("adding a.txt and dir/b.txt").call();
-
-				prestage = DirCache.read(db.getIndexFile(), db.getFS())
-						.getEntry(indexFile.getName());
-
-				// modify file and add to index
-				writer.print("new content");
-			}
-			nestedFileWriter.print("new content");
-		}
-		git.add().addFilepattern("a.txt").addFilepattern("dir").call();
+		writeTrashFile("dir/b.txt", "content");
+
+		// add files and commit them
+		git.add().addFilepattern("a.txt").addFilepattern("dir/b.txt").call();
+		secondCommit = git.commit().setMessage("adding a.txt and dir/b.txt").call();
+
+		prestage = DirCache.read(db.getIndexFile(), db.getFS()).getEntry(indexFile.getName());
+
+		// modify files and add to index
+		writeTrashFile("a.txt", "new content");
+		writeTrashFile("dir/b.txt", "new content");
+		git.add().addFilepattern("a.txt").addFilepattern("dir/b.txt").call();
 
 		// create a file not added to the index
-		untrackedFile = new File(db.getWorkTree(),
-				"notAddedToIndex.txt");
-		FileUtils.createNewFile(untrackedFile);
-		try (PrintWriter writer2 = new PrintWriter(untrackedFile)) {
-			writer2.print("content");
-		}
+		untrackedFile = writeTrashFile("notAddedToIndex.txt", "content");
 	}
 
 	@Test