Implements alt_get_field(): applies wpmc_alt_get_field_post_id filter for
post_id remapping, guards against missing ACF, runs do_shortcode on string
results, passes arrays/null through unchanged. 4 new tests; full suite
22 tests / 58 assertions green.
Note: Brain Monkey FunctionStub::__construct calls function_exists()
internally; expect() calls must precede when('function_exists')->alias()
in each test to avoid the alias intercepting the stub-creation check and
causing eval redeclaration errors.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Vladimir Bryzgalov