@Test
public void testResolveExceptionLevel_warn() {

    // do setup.
    Exception exception = new SystemException("W.i", "warn.");
    // do test.
    ExceptionLevel actualExceptionLevel = testTarget.resolveExceptionLevel(
            exception);
    // do assert.
    ExceptionLevel expectedExceptionLevel = ExceptionLevel.WARN;
    assertThat(actualExceptionLevel, is(expectedExceptionLevel));
}