### Question:
InputAssignmentReader { public AssociationDeclaration getAssociationDeclaration() { return associationDeclaration; } InputAssignmentReader(Assignment assignment, String targetName);   InputAssignmentReader(ItemAwareElement source, String targetName); static Optional<InputAssignmentReader> fromAssociation(DataInputAssociation in); AssociationDeclaration getAssociationDeclaration();  }### Answer:
@Test public void testNullBody() { final Assignment assignment = createAssignment(null); final InputAssignmentReader iar = new InputAssignmentReader(assignment, ID); final AssociationDeclaration associationDeclaration = iar.getAssociationDeclaration(); assertEquals(AssociationDeclaration.Type.FromTo, associationDeclaration.getType()); assertEquals("", associationDeclaration.getSource()); }