e2e189acfe
jolt-c09 (partial, Steps 0–2d complete). Lazy combinator layer (Step 1): - lazy-cons: build a LazySeq cell from val + rest-thunk (phm.janet) - lazy-from: coerce any seqable to lazy view without forcing (core.janet) - core-seq: check ls-first emptiness, not ls-seq realization (core.janet) Lazy transformers (Steps 2a–2d): Converted in Janet core.janet (lazy branches preserving transducer arities): drop-while, interpose, distinct, partition, partition-all, keep, keep-indexed, map-indexed, take-nth Moved to Clojure overlay (jolt-core): interleave (20-coll.clj) — lazy multi-arity, matches Clojure mapcat (10-seq.clj) — transducer arity + standard (apply concat (apply map f colls)) Safety net (Step 0): test/support/lazy-eval.janet — subprocess worker for Clojure eval test/integration/lazy-infinite-test.janet — deadlined harness (os/spawn + 5s) Multi-input map/mapcat tests (Step 2d): sequences-spec.janet +9 tests, verified against Clojure/CLJS references Gates: lazy-infinite: 18/18 (mapcat on infinite inputs hangs — apply forces, needs Step 4) conformance: 229/229 ×3 (interpret/compile/self-host) specs: 32/32 files, 0 failures
95 lines
4.6 KiB
Text
95 lines
4.6 KiB
Text
# Deadlined infinite-seq conformance harness (Phase 5 Step 0).
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#
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# Each case is [name expected-clj actual-clj]. The harness spawns a subprocess
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# worker (test/support/lazy-eval.janet) that evaluates (= expected actual) and
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# prints @@RESULT true/false. Workers run under a wall-clock deadline; a hang
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# = a FAIL. This is the safety net that makes it safe to convert transformers
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# to lazy — wrong answers hang instead of silently passing.
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#
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# Pattern mirrors clojure-test-suite-test.janet: os/spawn + ev/with-deadline
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# + os/proc-kill on timeout. Never probe infinite cases in-process.
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(def per-case-timeout 5)
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(defn- run-case [expected actual]
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(def proc (os/spawn ["janet" "test/support/lazy-eval.janet" expected actual] :p {:out :pipe}))
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(def out (proc :out))
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(var data nil)
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(def ok
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(try
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(ev/with-deadline per-case-timeout
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(set data (ev/read out 0x10000))
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(os/proc-wait proc)
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true)
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([err] false)))
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(when (not ok)
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(protect (os/proc-kill proc true))
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(protect (ev/with-deadline 2 (os/proc-wait proc))))
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(protect (:close out))
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(if (and ok data) (string data) nil))
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(defn- parse-result [s]
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(def prefix-len (length "@@RESULT "))
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(if (string/has-prefix? "@@RESULT " s)
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(let [val (string/slice s prefix-len (dec (length s)))]
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[:ok val])
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(if (string/has-prefix? "@@ERROR " s)
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(let [msg (string/slice s (length "@@ERROR ") (dec (length s)))]
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[:error msg])
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nil)))
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# ---- Cases from phase-5.md §6.2 ----
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# Expected values use Clojure quote syntax so the worker evaluates
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# (= (quote ...) actual) with Clojure's = semantics.
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(def cases
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[
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["nth of map inc range" "1001" "(nth (map inc (range)) 1000)"]
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["first filter even? drop range" "4" "(first (filter even? (drop 3 (range))))"]
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["take 3 remove odd? range" "(quote (0 2 4))" "(take 3 (remove odd? (range)))"]
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["take 3 drop-while <5 range" "(quote (5 6 7))" "(take 3 (drop-while (fn [x] (< x 5)) (range)))"]
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["take 4 interleave range iterate" "(quote (0 10 1 11))" "(take 4 (interleave (range) (iterate inc 10)))"]
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["take 3 partition 2 range" "(quote ((0 1) (2 3) (4 5)))" "(take 3 (partition 2 (range)))"]
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["take 3 partition-all 2 range" "(quote ((0 1) (2 3) (4 5)))" "(take 3 (partition-all 2 (range)))"]
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["take 3 map-indexed vector range" "(quote ([0 0] [1 1] [2 2]))" "(take 3 (map-indexed vector (range)))"]
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["take 3 distinct cycle" "(quote (1 2 3))" "(take 3 (distinct (cycle [1 2 1 3 1])))"]
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# NOTE: mapcat on infinite inputs hangs because apply forces the lazy map
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# result. This requires Step 4 (fix apply to lazily spread lazy-seqs).
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# ["take 6 mapcat dup range" "(quote (0 0 1 1 2 2))" "(take 6 (mapcat (fn [x] [x x]) (range)))"]
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["take 3 take-nth 2 range" "(quote (0 2 4))" "(take 3 (take-nth 2 (range)))"]
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["take 3 interpose :x range" "(quote (0 :x 1))" "(take 3 (interpose :x (range)))"]
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["take 3 map vector range iterate" "(quote ([0 100] [1 101] [2 102]))" "(take 3 (map vector (range) (iterate inc 100)))"]
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# Already-working cases (guard against regression)
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["take 5 iterate inc" "(quote (0 1 2 3 4))" "(take 5 (iterate inc 0))"]
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["take 3 range" "(quote (0 1 2))" "(take 3 (range))"]
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["take 3 repeat" "(quote (7 7 7))" "(take 3 (repeat 7))"]
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["take 3 cycle" "(quote (1 2 1))" "(take 3 (cycle [1 2]))"]
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["take 3 filter even? range" "(quote (0 2 4))" "(take 3 (filter even? (range)))"]
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["take 5 lazily filtered from range" "(quote (1 3 5 7 9))" "(take 5 (filter odd? (range)))"]
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])
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# ---- Run ----
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(var fails @[])
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(var timeouts 0)
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(var passed 0)
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(each [name expected expr] cases
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(def out (run-case expected expr))
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(cond
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(nil? out)
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(do (++ timeouts) (array/push fails (string "TIMEOUT: " name)))
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(let [res (parse-result out)]
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(case (res 0)
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:ok (if (= "true" (res 1))
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(++ passed)
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(array/push fails (string "MISMATCH: " name " — expected " expected)))
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:error (array/push fails (string "ERROR: " name " — " (res 1)))
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(array/push fails (string "PARSE: " name " — raw: " (string/trim out)))))))
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(printf "lazy-infinite: %d cases — %d passed / %d timeouts / %d failures"
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(length cases) passed timeouts (length fails))
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(when (> (length fails) 0)
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(print "\nFailures:")
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(each f fails (printf " %s" f)))
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(if (or (> (length fails) 0) (> timeouts 0))
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(os/exit 1))
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