tests: identifier-width wildcard matrix

Public Access

SEMI E5 allows identifier fields (DATAID, RPTID, VID, CEID, ALID,
EXID, OBJID, …) to be encoded as U1, U2, U4, or U8.  Our parsers
route through any_unsigned_first<T> in messages_helpers.hpp.  The
existing per-message round-trip tests prove the U4 path; this
commit adds the cross-width matrix that the interop incident with
secsgem-py demanded:

  - as_u4_scalar accepts U1/U2/U4/U8 inputs for the same value
  - as_u8_scalar accepts every narrower width
  - as_u1_scalar accepts wider widths when the value fits
  - as_u1_scalar / as_u2_scalar REJECT out-of-range values rather
    than silently truncating
  - codec round-trip preserves the format byte AND the value
  - signed counterparts (as_i4_scalar) follow the same rule for I1/I2

If a future code-gen change hard-codes a single width on any
identifier field, the rejection case here breaks loudly.

Closes #12 in the test-gap backlog (renumbered: this is gap entry
"identifier wildcard matrix").

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

This commit is contained in:

Raphael Maenle

2026-06-09 10:54:45 +02:00

parent ef3a07b2d5

commit 158ebed5c8

2 changed files with 123 additions and 0 deletions

									
										CMakeLists.txt
									
		+1
		
												View File
												
				@@ -130,6 +130,7 @@ add_executable(secsgem_tests

				  tests/test_wire_ceid_emission.cpp

				  tests/test_live_gem300.cpp

				  tests/test_e87_wire_scenarios.cpp

				  tests/test_identifier_wildcards.cpp

				)

				target_link_libraries(secsgem_tests PRIVATE secsgem doctest::doctest)

				target_compile_definitions(secsgem_tests PRIVATE