All PUSHW values fit in signed 16-bit range.

raycast function should be declared with a return type.

Compiled font can be saved and reloaded without corruption.

create_variable_poc_font returns the output path it was given.

build_doom_font returns the output path it was given.

A returning function should leave exactly one value on stack.

fpgm bytecode is identical after round-trip.

Font survives a save-load round-trip.

Scale=1 produces sin(90deg) == 1.

Scale=32767 produces sin(90deg) == 32767.

set_point_y intrinsic generates SCFS assembly.

Point index should be pushed before coordinate.

sin(0) == 0.

sin(180 deg) == 0.

sin(270 deg) == -scale (-256).

sin(90 deg) == scale (256).

Tables have the expected number of entries.

sin(90 deg) = sin(entry 64) should be the scale factor.

sin(x) == -sin(x + 128) for all x (half-circle symmetry).

Default sin table has exactly 256 entries.

All sin values have magnitude <= scale.

sin(0) should be 0.

Very small fixed-point values (sub-unit precision). 0.001 cannot be exactly represented in 16.16 (65536 * 0.001 = 65.536, truncated t

doom.doom source file must exist.

Standard library functions are registered.

Storage arrays are allocated with correct sizes.

Invalid DSL source raises an appropriate error.

Total function count stays within practical limits.

Total storage allocation stays within practical limits.

Call to undefined function raises an error.

Reference to undefined variable raises an error.

All user functions are assigned FDEF IDs.

A void function should consume all pushed values.

Number of wall cells matches non-zero map entries stored in prep.

While loop helper functions are allocated.

build_font injects actual assembly and it round-trips.

Total number of function IDs allocated so far.

Total number of storage slots allocated so far.

Generate the variable POC font once per test module.