SiLeBAT/FSK-Lab

package de.bund.bfr.knime.fsklab.nodes.environment;

import static org.junit.Assert.*;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;

import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;

public class ExistingEnvironmentManagerTest {

  @Rule
  public TemporaryFolder temporaryFolder = new TemporaryFolder();

  @Test
  public void testEmptyConstructor_nothing_shouldSetEmptyPath() {
    ExistingEnvironmentManager environmentManager = new ExistingEnvironmentManager();
    assertTrue(environmentManager.getEnvironmentPath().isEmpty());
  }

  @Test
  public void testGetEnvironment_nullEnvironment_shouldReturnEmptyOptional() {
    ExistingEnvironmentManager environmentManager = new ExistingEnvironmentManager(null);
    assertFalse(environmentManager.getEnvironment().isPresent());
  }

  @Test
  public void testGetEnvironment_emptyEnvironment_shouldReturnEmptyOptional() {
    ExistingEnvironmentManager environmentManager = new ExistingEnvironmentManager("");
    assertFalse(environmentManager.getEnvironment().isPresent());
  }

  @Test
  public void testGetEnvironment_nonExistingEnvironment_shouldReturnEmptyOptional() {
    ExistingEnvironmentManager environmentManager =
        new ExistingEnvironmentManager("@@NonExistingPath");
    assertFalse(environmentManager.getEnvironment().isPresent());
  }

  @Test
  public void testGetEnvironment_emptyExistingEnvironment_shouldReturnEmptyOptional()
      throws IOException {
    String emptyFolder = temporaryFolder.newFolder("emptyFolder").getAbsolutePath();
    ExistingEnvironmentManager environmentManager = new ExistingEnvironmentManager(emptyFolder);
    assertFalse(environmentManager.getEnvironment().isPresent());
  }

  @Test
  public void testGetEnvironment_nonEmptyExistingEnvironment_shouldReturnPresentOptional()
      throws IOException {
    String userFolder = System.getProperty("user.home");
    ExistingEnvironmentManager environmentManager = new ExistingEnvironmentManager(userFolder);

    assertTrue(environmentManager.getEnvironment().isPresent());
    Path environment = environmentManager.getEnvironment().get();

    assertTrue(Files.exists(environment));
    assertTrue(Files.isDirectory(environment));
    assertTrue(Files.list(environment).findAny().isPresent());
  }
}