[DAFFODIL-2421] Add test for Erratum 5.1 escapeEscapeCharacter processing error detection

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 2.7.0
• Component/s: DFDL Language, QA
• Assignee: Unassigned
• Reporter: Mike Beckerle
• Created: 21/Oct/20 20:35
• Updated: 05/Feb/21 20:13

Description

Erratum 5.1 describes a specific test case for escapeEscapeCharacter:

Consider a dfdl:escapeScheme annotation with the following properties:

dfdl:escapeBlockStart="start"

dfdl:escapeBlockEnd="end"

dfdl:escapeEscapeCharacter="#"

If this is used to serialize a DFDL Infoset element of type xs:string with value “A hash is a #”, then the value is wrapped with the dfdl:escapeBlockStart and dfdl:escapeBlockEnd, giving simple content "startA hash is a #end".  If this data was parsed, the "#end" will be treated as an escaped escape block end and the parse will fail, reporting that there is no escape block end in the data.

In this scenario, the data is not compliant with the escape scheme, and the DFDL serializer must issue a processing error.

We need a specific test to match this case verifying that the processing error does in fact occur, and of course to fix the behavior if it does not.