FileReporterTest.java

/**
 * BSD-style license; for more info see http://pmd.sourceforge.net/license.html
*/
package test.net.sourceforge.pmd.cpd;

import junit.framework.TestCase;
import net.sourceforge.pmd.cpd.FileReporter;
import net.sourceforge.pmd.cpd.ReportException;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;

/**
 * @author  Philippe T'Seyen
 */
public class FileReporterTest extends TestCase
{
  public void testCreation() {
    try {
      new FileReporter(null);
      fail("expected NullPointerException");
    } catch (NullPointerException npe) {
    }
  }

  public void testEmptyReport() throws ReportException {
    File reportFile = new File("report.tmp");
    FileReporter fileReporter = new FileReporter(reportFile);
    fileReporter.report("");
    assertTrue(reportFile.exists());
    assertEquals(0, reportFile.length());
    assertTrue(reportFile.delete());
  }

  public void testReport() throws ReportException, IOException {
    String testString = "first line\nsecond line";
    File reportFile = new File("report.tmp");
    FileReporter fileReporter = new FileReporter(reportFile);

    fileReporter.report(testString);
    assertEquals(testString, readFile(reportFile));
    assertTrue(reportFile.delete());
  }

  public void testInvalidFile() {
    File reportFile = new File("/invalid_folder/report.tmp");
    FileReporter fileReporter = new FileReporter(reportFile);
    try {
      fileReporter.report("");
      fail("expected ReportException");
    } catch (ReportException re) {
    }
  }

  private String readFile(File file) throws IOException {
    BufferedReader reader = null;
    try {
      reader = new BufferedReader(new FileReader(file));
      StringBuffer buffer = new StringBuffer();
      String line = reader.readLine();
      while (line != null) {
        buffer.append(line);
        line = reader.readLine();
        if (line != null) {
          buffer.append("\n");
        }
      }
      return buffer.toString();
    } finally {
      if (reader != null) reader.close();
    }
  }
}