### Question:
ReactionSpecification implements IImplementationSpecification { @Override public String getImplementationIdentifier() { return this.implementationIdentifier; } ReactionSpecification(String specificationReference, String implementationTitle,
            String implementationIdentifier, String implementationVendor); @Override String getSpecificationReference(); @Override String getImplementationTitle(); @Override String getImplementationIdentifier(); @Override String getImplementationVendor();  }### Answer:
@Test public void testGetImplementationIdentifier() { ReactionSpecification spec = new ReactionSpecification(REAC_REF, REAC_IMPL_TITLE, REAC_IMPL_ID, REAC_IMPL_VENDOR); Assert.assertEquals(REAC_IMPL_ID, spec.getImplementationIdentifier()); }