Harden stage-2 enrichment: durable sidecar, enforceable timeout, tests

Address code-review findings on the metadata pipeline:

- finalize_known! now fsyncs the sidecar bytes before the rename and
  fsyncs done/ after, so the "file in done/ implies sidecar present"
  invariant holds across power loss, not just process crashes. The
  docstring previously claimed an fsync the code never performed.
- run_exiftool's timeout escalates SIGTERM -> (2s grace) -> SIGKILL, so
  an exiftool that ignores SIGTERM can't pin a worker forever on
  wait(proc). Previously the timeout sent only SIGTERM.
- Add test/ (48 tests) covering the correctness-critical paths:
  sanitize_filename, normalize_metadata, degraded build_metadata,
  real exiftool extraction, finalize_known! end-to-end, recover_dir!.
This commit is contained in:
2026-07-02 16:42:01 -04:00
parent 1c7d7d6cad
commit 2a46f5021a
3 changed files with 208 additions and 5 deletions

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test/runtests.jl Normal file
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using Test
using FileServer
using JSON3
# Pull internals into scope. These aren't exported (only `run` is), but the
# whole risk profile of this pipeline lives in these functions, so we test them
# directly rather than only through the HTTP surface.
using FileServer: Job, Config, ChannelQueue, enqueue!, dequeue!, length,
sanitize_filename, recover_dir!, normalize_metadata,
build_metadata, finalize_known!, run_exiftool
# A minimal, valid 1×1 PNG. Lets the real-exiftool tests assert stable facts
# (FileType == "PNG", 1×1 dimensions) that don't drift across exiftool versions.
const PNG_1x1 = UInt8[137,80,78,71,13,10,26,10,0,0,0,13,73,72,68,82,0,0,0,1,0,
0,0,1,8,6,0,0,0,31,21,196,137,0,0,0,11,73,68,65,84,120,218,99,100,248,255,
191,30,0,5,132,2,127,194,91,30,42,0,0,0,0,73,69,78,68,174,66,96,130]
"Build a Config whose data dirs all live under a fresh temp directory."
function tmp_config(root; kwargs...)
cfg = Config(;
spool_dir = joinpath(root, "spool"),
known_dir = joinpath(root, "known"),
unknown_dir = joinpath(root, "unknown"),
done_dir = joinpath(root, "done"),
failed_dir = joinpath(root, "failed"),
kwargs...,
)
FileServer.ensure_dirs(cfg)
return cfg
end
@testset "FileServer" begin
@testset "sanitize_filename" begin
@test sanitize_filename("report.pdf") == "report.pdf"
# Directory components and traversal are stripped, not preserved.
@test sanitize_filename("../../etc/passwd") == "passwd"
@test sanitize_filename("/abs/path/x.txt") == "x.txt"
# Leading dots removed so "..", ".hidden" can't sneak through.
@test sanitize_filename("..") == "unnamed"
@test sanitize_filename(".hidden") == "hidden"
# Unsafe chars collapse to underscores; empty falls back to "unnamed".
@test sanitize_filename("a b&c*.d") == "a_b_c_.d"
@test sanitize_filename("") == "unnamed"
# Length is capped.
@test Base.length(sanitize_filename("a"^500)) == FileServer.MAX_NAME_LEN
end
@testset "normalize_metadata" begin
job = Job("id-1", "photo.jpg", "/data/known/id-1-photo.jpg", 4242, 0.0)
# Group-prefixed tags as exiftool -G emits them are already group-stripped
# by run_exiftool before reaching normalize_metadata, so keys are bare.
bytag = Dict{String,Any}(
"FileType" => "JPEG",
"MIMEType" => "image/jpeg",
"ImageWidth" => 800,
"ImageHeight"=> 600,
"Author" => "Ada Lovelace",
"Creator" => "Acrobat", # feeds created_by, not author
"CreateDate" => "2020:01:02 03:04:05",
"ModifyDate" => "2020:01:02 03:04:06",
"PageCount" => 12,
)
m = normalize_metadata(job, bytag)
@test m.file_type == "JPEG"
@test m.mime_type == "image/jpeg"
@test m.dimensions == (width = 800, height = 600)
@test m.author == "Ada Lovelace"
@test m.created_by == "Acrobat"
@test m.created_date == "2020:01:02 03:04:05"
@test m.page_count == 12
@test m.error === nothing
@test m.raw === bytag
# file_size is authoritative from the Job, never from exiftool.
@test m.file_size == 4242
end
@testset "normalize_metadata: missing tags degrade to nothing" begin
job = Job("id-2", "blob.bin", "/data/known/id-2-blob.bin", 7, 0.0)
m = normalize_metadata(job, Dict{String,Any}())
@test m.file_type === nothing
@test m.dimensions === nothing # neither width nor height present
@test m.author === nothing
@test m.file_size == 7
@test m.error === nothing # empty-but-present dict is still "success"
end
@testset "build_metadata: degraded on extraction failure" begin
mktempdir() do root
cfg = tmp_config(root; exiftool_timeout=5)
# Point at a nonexistent file → exiftool exits non-zero → degraded.
job = Job("id-3", "gone.dat", joinpath(cfg.known_dir, "id-3-gone.dat"), 99, 0.0)
m = build_metadata(job, cfg)
@test m.error !== nothing
@test m.file_type === nothing
@test m.raw === nothing
@test m.file_size == 99 # still authoritative from the Job
@test m.id == "id-3"
end
end
@testset "run_exiftool: real extraction on a PNG" begin
mktempdir() do root
p = joinpath(root, "pixel.png")
write(p, PNG_1x1)
bytag = run_exiftool(p, 30)
@test bytag !== nothing
@test bytag["FileType"] == "PNG"
@test bytag["ImageWidth"] == 1
@test bytag["ImageHeight"] == 1
end
end
@testset "finalize_known!: sidecar-first commit, end to end" begin
mktempdir() do root
cfg = tmp_config(root)
# A real known-stage file to enrich.
src = joinpath(cfg.known_dir, "id-9-pixel.png")
write(src, PNG_1x1)
job = Job("id-9", "pixel.png", src, Base.length(PNG_1x1), 0.0)
meta = build_metadata(job, cfg)
file_dest, sidecar = finalize_known!(cfg, job, meta)
# File moved into done/, original gone from known/.
@test isfile(file_dest)
@test dirname(file_dest) == cfg.done_dir
@test !isfile(src)
# Sidecar committed alongside it, valid JSON, no leftover .tmp.
@test isfile(sidecar)
@test endswith(sidecar, ".meta.json")
@test !isfile(string(sidecar, ".tmp"))
parsed = JSON3.read(read(sidecar, String))
@test parsed.file_type == "PNG"
@test parsed.file_size == Base.length(PNG_1x1)
@test parsed.error === nothing
end
end
@testset "recover_dir!: re-enqueues work, skips sidecars" begin
mktempdir() do root
dir = joinpath(root, "known"); mkpath(dir)
uuid = "0123456789abcdef0123456789abcdef0123" # 36 chars
work = joinpath(dir, string(uuid, "-report.pdf"))
write(work, "x")
write(joinpath(dir, string(uuid, "-report.pdf.meta.json")), "{}") # sidecar
write(joinpath(dir, "shortname"), "y") # no uuid prefix
q = ChannelQueue(10)
n = recover_dir!(dir, q)
@test n == 2 # the two real files, not the sidecar
@test length(q) == 2
jobs = [dequeue!(q), dequeue!(q)] # sorted by filename on recovery
# "0123...-report.pdf" sorts before "shortname".
@test jobs[1].id == uuid
@test jobs[1].original_name == "report.pdf"
@test jobs[1].path == work
# File with no uuid prefix keeps its whole name; gets a minted id.
@test jobs[2].original_name == "shortname"
@test !isempty(jobs[2].id)
end
end
end