ludic/examples/library/coverage.ludic
Orkuncakilkaya bf36bc8a8f refactor(runtime,packages,examples): named constants, package enums, idiom sweep
- runtime: HEADLESS_FRAME_PATH, STICK_DEADZONE / STICK_LEFT_X/Y, key and
  byte codes as char literals throughout (`k == 'w'`, `fill(rt_map, ' ', …)`)
- ludic.gameplay/stats: drop the duplicate `stat_field` (it answered "atk"
  for every build stat); Stats.base uses stats_field_name
- ludic.shooter: compare aim modes and fire patterns with AimMode.* and
  WeaponPattern.* instead of raw ints; STICK_RIGHT_X/Y
- ludic.npcai: DecisionMade / brain_set_state use AiState.*
- examples/games/menu.ludic uses Font.load / Ui.* with FONT_PATH and
  BACKDROP named; strings.ludic header says what it prints
- whole tree: `x = x + 1` → `x += 1` (single-term right-hand sides only),
  `0 - x` → `-x`, ASCII codes → char literals; every .ludic and every
  ```ludic fence reformatted with the fixed formatter (whitespace only)

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
2026-09-05 01:12:26 +03:00

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# coverage.ludic — a spec built to be measured by `bin/x test --coverage` (issue
# #45). Compiled with `--coverage`, every statement bumps a per-source-line hit
# counter; at exit the counts are dumped and `bin/x test --coverage` turns them
# into a per-file line-coverage report.
#
# The tests below exercise `sign` fully but only the taken branches of `grade`,
# so the report flags `grade`'s unreached line — the whole point of coverage:
# it shows you the branch your tests forgot.
#
# As an ordinary spec it still passes and prints:
# == 3 passed, 0 failed ==
program CoverageSpec {
# fully covered: the tests below hit all three returns.
function sign(n: int) -> int {
if n > 0 {
return 1
}
if n < 0 {
return -1
}
return 0
}
# partially covered: no test passes a score below 60, so the `return 0` (fail)
# line is never reached and shows up as uncovered in the report.
function grade(score: int) -> int {
if score >= 90 {
return 4
}
if score >= 60 {
return 2
}
return 0
}
test "sign covers every branch" {
expect_eq(sign(7), 1)
expect_eq(sign(-3), -1)
expect_eq(sign(0), 0)
}
test "grade: high scores" {
expect_eq(grade(95), 4)
expect_eq(grade(75), 2)
}
test "grade: boundary" {
expect_eq(grade(90), 4)
expect_eq(grade(60), 2)
}
}