@Test(expected = IllegalArgumentException.class)
public void testMultipleBootstrapingMethodsAreNotAllowed() throws Throwable {

    // GIVEN
    final Method bootstrappingMethodOne = getClass().getMethod("bootstrappingMethodOne", DataSource.class);
    final Method bootstrappingMethodTwo = getClass().getMethod("bootstrappingMethodTwo");
    when(bootstrappingInpector.getAnnotatedMethods()).thenReturn(Arrays.asList(bootstrappingMethodOne, bootstrappingMethodTwo));
    final BootstrappingDecorator decorator = new BootstrappingDecorator();
    // WHEN
    decorator.beforeAll(invocation);
    // THEN
    // IllegalArgumentException is thrown. Only single method is allowed
}