package com.atlassian.plugin.loaders;
   
   import com.atlassian.plugin.loaders.classloading.DeploymentUnit;
   import org.hamcrest.Matcher;
   import org.junit.Test;
   
   import java.io.File;
   import java.util.Arrays;
   import java.util.Collection;
  
  import static com.atlassian.plugin.loaders.classloading.TestDeploymentUnit.deploymentUnitWithPath;
  import static com.atlassian.plugin.test.Matchers.fileNamed;
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.contains;
  import static org.hamcrest.Matchers.empty;
  
  public class TestFileListScanner {
      @Test
      public void testNormalOperation() throws Exception {
          final FileListScanner scanner = new FileListScanner(Arrays.asList(new File("foo.txt"), new File("bar.txt")));
          assertContainsFooAndBar(scanner);
  
          // Second scan should have no new units.
          assertThat(scanner.scan(), empty());
  
          scanner.reset();
  
          assertContainsFooAndBar(scanner);
      }
  
      private void assertContainsFooAndBar(final FileListScanner scanner) {
          final Collection<DeploymentUnit> scan = scanner.scan();
          final Matcher[] expected = {deploymentUnitWithPath(fileNamed("foo.txt")), deploymentUnitWithPath(fileNamed("bar.txt"))};
          assertThat(scan, contains(expected));
      }
  }