@Theory
  public void nullValueReturnsNull(String value) {
    assumeThat(value, nullValue());

    component.setValue(value);

    Connection connection = converter.getConnection(facesEnv.getFacesContext(), component);
    assertThat(connection, nullValue());
  }
  @Theory
  public void obtainValidConnection(String jndiName) {
    assumeThat(jndiName, notNullValue());
    assumeTrue(jndiName.startsWith("java:"));
    assumeThat(jndiName, not(containsString("invalid")));

    component.setValue(jndiName);
    Connection connection = converter.getConnection(facesEnv.getFacesContext(), component);
    assertThat(connection, notNullValue());
  }
  @Theory
  @SuppressWarnings("unused")
  public void invalidJnidNameThrowsNamingEx(String jndiName) {
    assumeThat(jndiName, notNullValue());
    assumeTrue(jndiName.length() > 0);
    assumeTrue(!jndiName.startsWith("java:"));

    component.setValue(jndiName);

    Connection connection;
    try {
      connection = converter.getConnection(facesEnv.getFacesContext(), component);
      fail("A NamingException was expected");
    } catch (Exception e) {
      assertThat(e, is(SourceException.class));
    }
  }