### Question:
ExpressionLanguagePropertyConverter { public static ExpressionLanguage wbFromDMN(final String language) { if (language == null) { return new ExpressionLanguage(""); } else { return new ExpressionLanguage(language); } }  static ExpressionLanguage wbFromDMN(final String language); static String dmnFromWB(final ExpressionLanguage language);  }### Answer:
@Test public void testWBFromDMNWithNullValue() { assertEquals("", ExpressionLanguagePropertyConverter.wbFromDMN(null).getValue()); }
@Test public void testWBFromDMNWithNonNullValue() { assertEquals(EXPRESSION_LANGUAGE, ExpressionLanguagePropertyConverter.wbFromDMN(EXPRESSION_LANGUAGE).getValue()); }