The mutation pass turned up one defect that did not make the suite go red: a reader branch that forgets to advance reads the same character for ever, and dune test waits as long as it is left to. In CI that is a job killed by the runner with nothing named and no output to read. watchdog.ml puts an alarm on every test binary — generous, because an alarm that fires on a slow machine is a flake — and a five-second one around each read in test_flan, where the budget really is small. The first read that does not return wedges the rest, so a looping reader costs five seconds and names the row instead of costing eight minutes or never finishing. Both were watched: the string-escape loop now fails in five seconds with the case named, and the per-binary backstop was armed short and observed to fire.
64 lines
3.0 KiB
Plaintext
64 lines
3.0 KiB
Plaintext
(tests
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(names test_flan test_acceptance test_reload test_agent test_session test_dev test_emacs test_repl test_cider)
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; Explicit because test_sanitize lives in this directory and is not one of
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; these: two stanzas in one directory have to say which modules are whose.
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; watchdog is every binary's clock: a hanging test reports nothing, so each
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; of these arms an alarm that turns "for ever" into a failing run.
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(modules test_flan test_acceptance test_reload test_agent test_session
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test_dev test_emacs test_repl test_cider watchdog)
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(libraries flan unix)
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; The acceptance programs are part of the test corpus: if the reader, the
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; parser or the checker regresses on them we want to know here, not at the CLI.
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(deps
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(file %{workspace_root}/calc-me.flan)
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(file %{workspace_root}/sand.flan)
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; The raylib bindings, because sand.flan and the FFI case import them and an
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; import reads the directory at build time. sand.flan itself is above: the
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; headless case imports it as a single-file package.
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(glob_files %{workspace_root}/vendor/raylib/*)
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; The dev agent package: its Flan declarations and the C that implements them.
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(glob_files %{workspace_root}/vendor/agent/*)
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; The EDN tokenizer, which programs/edn.flan imports.
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(glob_files %{workspace_root}/vendor/edn/*)
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; The ported raylib examples. Only one of them has a headless acceptance
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; case, but it imports its example as a package and that example imports
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; examples/digits.flan, so the directory has to be here whole.
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(glob_files %{workspace_root}/examples/*)
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(glob_files programs/*.flan)
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; The reload primitive's host: a C main that dlopens what Build.shared made.
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(file reload_host.c)
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; test_dev runs the compiler itself: flan dev launches and owns a program.
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(file %{workspace_root}/bin/main.exe)
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; The Emacs client, which test_emacs drives against a real daemon.
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(glob_files %{workspace_root}/emacs/*.el)
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; The WASI host the wasm32 case runs its module under, when no wasmtime or
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; wasmer is installed.
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(file wasm-run.mjs)))
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; The corpus a second time under ASan and UBSan. Its own alias and not part of
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; `dune test`: a sanitized build is a statically linked 1.8MB binary that takes
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; tens of seconds to produce, so the sweep is minutes against the existing
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; suite's seconds, and a test nobody will wait for is a test nobody runs.
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;
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; dune build --root . @sanitize
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; An executable plus a rule rather than a (test ...): a test stanza attaches
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; to the @runtest alias and offers no way to be attached to another one, which
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; is the whole point here.
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(executable
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(name test_sanitize)
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(modules test_sanitize watchdog)
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(libraries flan unix))
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(rule
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(alias sanitize)
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(deps
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test_sanitize.exe
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(file %{workspace_root}/calc-me.flan)
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(file %{workspace_root}/sand.flan)
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(glob_files %{workspace_root}/vendor/raylib/*)
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(glob_files %{workspace_root}/vendor/agent/*)
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(glob_files %{workspace_root}/vendor/edn/*)
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(glob_files %{workspace_root}/examples/*)
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(glob_files programs/*.flan))
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(action (run ./test_sanitize.exe)))
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