test: derive the REST integration specifications - #716
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WalkthroughAdds sandbox-backed REST integration tests to the UTS suite. The changes provide app provisioning, integration clients and polling, coverage for REST endpoints, proxy-based fault tests, and updated test guidance and deviation records. ChangesREST integration test tier
Estimated code review effort: 4 (Complex) | ~60 minutes Merge Risk: 🟡 Moderate · up to Several new integration tests can pass without detecting the behavior they are intended to protect, including duplicate publishing and filtering regressions. Strengthen those assertions before merging the test tier. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
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Inline comments:
In `@test/uts/rest/integration/presence_test.py`:
- Around line 200-202: Extend the test around `rest_channel.presence.history` to
verify both timestamp bounds exclude the generated events: querying with only
`end=time_before` and with only `start=time_after + 1` must return no items.
Keep the existing assertion that the in-window query retrieves the events.
- Around line 255-258: Update the presence-history pagination test after
`page1.next()` to assert that event IDs in `page1.items` and `page2.items` are
disjoint, so a repeated page fails the test.
In `@test/uts/rest/integration/publish_test.py`:
- Around line 73-75: Update any_message_in_history and the surrounding
idempotency check to publish a distinct marker after the three attempts, wait
until that marker appears in channel history, and only then count messages with
the fixed ID. Do not use the first-nonempty history page as the completion
condition.
In `@test/uts/rest/integration/push_admin_test.py`:
- Around line 203-205: Update the removal assertion after
registrations.remove(device_id) to use wall_clock_poll_until around
registrations.get(device_id), waiting until it raises AblyException with status
code 404; follow the polling pattern used by the bulk-removal test.
In `@test/uts/rest/integration/push_channels_test.py`:
- Around line 127-129: In both tests following unsubscribe_device() and
unsubscribe_client(), poll the corresponding filtered channel-subscription list
until it is empty instead of asserting immediately, reusing the polling approach
from test_rsh1c4_remove_channel_subscription.
In `@test/uts/rest/integration/time_stats_test.py`:
- Line 107: Update the fixture and assertions around the stats() call so the
test covers more than five distinct hourly intervals, verifies their IDs are in
ascending order when direction is 'forwards', and confirms exactly five results
are returned for limit=5.
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Inline comments:
In `@test/uts/rest/integration/proxy/rest_fallback_test.py`:
- Around line 350-359: Update the history check in the retry-deduplication test
to continue polling for the existing bounded integration timeout after
`wall_clock_poll_until` first finds a match. On each later history page, assert
that no more than one message matches the existing name and data criteria, then
retain the final assertion that exactly one match was found.
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The integration tier talks to the real Ably sandbox, so it needs the app every specification's BEFORE ALL TESTS block provisions, and the pieces of that preamble that only mean something against a live server. helpers/sandbox.py provisions the app from the canonical app setup in ably-common, vendored under assets/ because the specifications index into its key ordering by position. Provisioning goes over plain httpx rather than through AblyRest: a client that cannot form a request should fail a test rather than look like a broken fixture. Teardown is best effort, since a sandbox app expires on its own. Alongside it are random_id(), the cipher the presence fixtures are encrypted with, and HS256 JWT signing, which the auth specification reaches for a third-party library to do. sandbox_rest_client and sandbox_realtime_client build clients that carry no test_options and reach the network, and wall_clock_poll_until waits on real time, which is what an integration specification's timeouts measure. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
…ions publish, history, pagination and time_stats, against the sandbox rather than a mock: 18 tests, the first two once per protocol. The specifications' timing assumptions need care against a real server. History is not consistent immediately after a publish, so every read polls until the page holds what it expects rather than reading once; a PaginatedResult is always truthy, so a poll returning the page directly would be satisfied by the first empty one. The stats specification guards its assertions on there being stats to read, which a freshly provisioned app has none of, so the tests inject an interval through the sandbox's own endpoint and assert unconditionally; real traffic is aggregated on the server's schedule, with no bounded wait after which it is certainly counted. RSL2b3 keeps the specification's four assertions and adds the converse they omit, that each window excludes the other batch. Without it the test passes with the time range dropped entirely. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
presence and batch_presence, 20 tests, both once per protocol. The presence specifications read the members the app setup pre-populates on persisted:presence_fixtures, one of which is encrypted; a channel carries the cipher from construction, so the test that decodes it holds its own client. Four tests reach for a clientId filter on RestPresence#get that ably-python does not have. Only the one that is about the filter is gated; the three decoding tests use it to pick a fixture, so they select in Python and adapt the count they assert. batch_presence needs Rest#batchPresence, which does not exist at all, so its three tests are gated against the spelling the unit tier already uses. Their setup runs, and the presence members reach the server, so what is gated is the read rather than the whole test. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
…cifications auth, revoke_tokens and mutable_messages, 20 tests, the last once per protocol. The auth specification signs its JWTs with the harness rather than a library. RSC10 is gated: Rest#request passes raise_on_error=False, so the HTTP layer never raises on the 401 and the reauthorise-and-retry branch never runs, while the pre-emptive check is separately inert without a time offset. The same expired token renews correctly through publish(). revoke_tokens needs Auth#revokeTokens, which does not exist, so all four tests are gated. Their assertions were checked against the endpoint directly, which moved two of them: a revoked token does not leave the connection DISCONNECTED with 40141 here, because the client the specification builds holds only a TokenDetails and cannot re-authorise, so RSA4a fails the connection with 40171. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
push_admin and push_channels, 18 tests, json only. A filtered list needs proving. The push admin filter parameters are camelCase on the wire, and the server drops one it does not recognise rather than rejecting it, so a snake_case filter returns the whole unfiltered page. A test asserting that the row it just created is present then passes with the filter doing nothing. Every filtered list here carries a control — a decoy row, or a count taken before the call — so that narrowing is what the assertion rests on. Deletion is asynchronous, so the counts that follow a removal poll. push_channels needs channel.push, client.device and LocalDevice, none of which exist, so both tests are gated. The specification's hard-coded device identity token is also rejected by the server, so the test takes the one the registration issues. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
The skill described a suite where every request came from a mock. It now covers the sandbox-backed tier too: the harness names, the rule that only a specification carrying `## Protocol Variants` takes the protocol fixture, and the traps that came out of deriving the eleven REST integration specifications. Most of those traps produce a test that passes while proving nothing rather than one that fails — a filter the server ignores rather than rejects, a paginated result that is truthy when empty, a guarded assertion that never runs against a fresh app. Each is recorded with the measurement behind it. The timers section now distinguishes three regimes rather than one, since the realtime tier has a clock seam and the integration tier uses real time on purpose. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
…found The eleven REST integration specifications add eleven gated Test IDs to the record. Ten of them land on root causes the unit tiers already found — no Auth#revokeTokens, no Rest#batchPresence, no PushChannel surface, no clientId filter on RestPresence#get — so those entries grow a tier rather than gaining a twin. Both halves now gate on the same spelling, and go green together. Two SDK defects are new. Rest#request never renews an expired token: it is the only call site passing raise_on_error=False, so the HTTP layer returns the 401 instead of raising and the reauthorise-and-retry branch never runs, while the pre-emptive check is separately inert without a time offset. And a basic-auth connection records its clientId as validated and None, so enterClient can never match; every test that needs presence on an anonymous connection passes '*' around it. Four specification faults are recorded and not filed: a device identity token push_channels.md hard-codes that the server rejects, two tests that close the realtime connection the following read depends on, and a time-range test whose assertions hold with the range dropped. The header now separates Test IDs, derived tests and pytest cases, which the integration tier is the first to make diverge in both directions. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
uts/docs/proxy.md puts ably/uts-proxy between the client and the sandbox for the specifications that are about what the SDK does when a request goes wrong. The sandbox answers correctly, so the fault has to be injected in front of it: the proxy binds a port per session, takes plain HTTP on it and speaks TLS onwards, applies the session's rules, and records everything that crosses it. helpers/proxy.py supplies the proxy. The pinned release is downloaded on first use, checked against the sha256 the release publishes and extracted into ~/.cache/uts-proxy/<version>/, under a lock file so the several Python versions CI runs fetch it once between them; UTS_PROXY_LOCAL_PATH substitutes a locally built binary and UTS_PROXY_CONTROL_URL a control API already running. One control process serves a test run, on a free port rather than a fixed one so two suites on a machine do not collide, and it is reaped at the end of the run and again at interpreter exit. create_proxy_session and ProxySession are the specifications' own interface, with rules and log events left as the plain dictionaries their JSON describes. The package's proxy_session fixture opens sessions and closes every one of them, which is the specifications' AFTER EACH TEST. Its per-test timeout is 300 seconds, prepended so it is read in place of the tier's 120: a cold cache downloads the binary before the first test runs, and a specification that provokes a timeout sits through the delay it asked for. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
rest_fallback.md is the twelfth and last of the REST integration specifications, and the only one whose faults the sandbox will not produce on request: a request held past its timeout, a connection dropped mid-response, a CloudFront 403, a 5xx with and without a parseable body, a 4xx that must not be retried, and a publish the server persists while the client is told it failed. Each is a proxy rule firing once, so the retry that follows reaches the sandbox and the test is about what the SDK did in between. Every client authenticates through the specification's token_auth_callback: the session speaks plain HTTP, RSC18 refuses basic auth over it, and a token request routed through the session would be counted by the assertions that count requests, so the callback's own client goes straight to the sandbox. RSC15l2 is gated. The specification's httpRequestTimeout is milliseconds and ably-python's http_request_timeout is seconds, so its 3000 is three thousand seconds: against a session delaying /time by twenty, the request sat out the whole delay and succeeded on the primary host with no fallback attempted. Passing 3 makes the same test pass in 3.1 seconds, so the fallback path itself is compliant and the unit is the whole of the defect. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
The suite's README gains what a reader needs about the proxy package: where the binary comes from, the two environment variables that change how it is obtained, and the shape of a client built against a session. The translation skill gains what a writer needs — the harness table, a worked example and the traps the derivation hit, among them that a parent package's pytest timeout marker wins over a subpackage's unless the subpackage prepends its own, and that pytest-asyncio runs a session-scoped async fixture on a different event loop from the tests. deviations.md carries the one gated test and its measurement. The unit mismatch on http_request_timeout was already recorded twice, as something readable only off the options object; the proxy measures it reaching the wire, so both rows are corrected and the defect is counted once, as a root cause, where the gated test is. Its blast radius is bounded by the defaults coming out right by coincidence — 4 and 10 seconds being TO3l3's and TO3l4's 4000 and 10000 milliseconds — so only a client that configures the option is affected. Issue #709 is already filed against the same line for a different defect and the two are cross-referenced, since both change what one attempt may spend of the RSC15 retry budget. The counts are recomputed throughout: 1059 Test IDs, 1068 derived tests, 1139 pytest cases, and 67 gated root causes. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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Derives all twelve
uts/rest/integrationspecifications fromably/specificationinto 84 tests that run against the real Ably sandbox, and builds the two pieces of infrastructure they need: the sandbox app, and the programmable proxy the fault specifications route their traffic through.This is the first tier here that reaches the network. The unit tiers below it serve every request from a mock; these tests exercise the actual path to the server, which is the point —
uts/docs/integration-testing.mdasks for integration coverage exactly where correctness depends on client and server agreeing, and a mock cannot answer that question.What runs
## Protocol Variantsand run once per protocolRUN_DEVIATIONS=1for its own stated reasonWhole suite, after this branch:
Nothing under
ably/changes.The harness
test/uts/helpers/sandbox.pyprovisions one app per session over plainhttpxrather than throughAblyRest— provisioning is infrastructure, and a client that cannot form a request should fail a test rather than look like a broken fixture. Teardown is best effort, since a sandbox app expires on its own.The app setup is the canonical
test-resources/test-app-setup.jsonfromably/ably-common, vendored attest/uts/assets/. This matters more than it looks: the specifications index their keys by position —keys[0]full access,keys[2]per-channel,keys[4]revocable tokens — and this repository's existingtest/assets/testAppSpec.jsonhas different capabilities at those indices and putspushEnabledon a different namespace. Reusing it would have produced tests that pass while asserting the wrong thing.Alongside it:
sandbox_rest_client/sandbox_realtime_client,wall_clock_poll_until(the unit tier'spoll_untilspins on the event loop, which is right for a mock and wrong against a network),random_id, the cipher the presence fixtures are encrypted with, and HS256 JWT signing. The auth specification asks for a third-party JWT library;pyjwtis not in the lock, and adding it would break the mandatory--frozen.A
use_binary_protocolfixture parametrises only the tests that ask for it, and the 120-second timeoutintegration-testing.mdcalls for is scoped to this package alone.The proxy
rest_fallback.mdis about what the SDK does when a request goes wrong — a connection dropped mid-response, a 503 with and without a parseable body, a CloudFront 403, a 4xx that must not be retried, a request held past its timeout, and a publish the server persists while the client is told it failed. The sandbox answers correctly, souts/docs/proxy.mdputs ably/uts-proxy in front of it.test/uts/helpers/proxy.pysupplies it. The pinned v0.3.0 release is downloaded on first use, checked against the sha256 the release publishes, and extracted into~/.cache/uts-proxy/<version>/under a lock file, so the seven Python versions CI runs fetch it once between them. The download is anonymous — the repository is public — so CI needs no token and no new secret.UTS_PROXY_LOCAL_PATHsubstitutes a locally built binary or distributive, andUTS_PROXY_CONTROL_URLa control API already running, which the suite then leaves alone. One control process serves a test run, on a free port rather than a fixed one so two suites on a machine do not collide, and it is reaped at the end of the run and again at interpreter exit.create_proxy_sessionandProxySessionare the interfaceproxy.mdspecifies, complete rather than narrowed to whatrest_fallback.mdhappens to need: the seven realtime proxy specifications and the Objects one usetrigger_action,add_rules(position='prepend')andws_connectmatching, and need nothing added here. Rules and log events stay the plain dictionaries the specifications' JSON describes, so a rule in a test reads as the rule in the specification. The package'sproxy_sessionfixture opens sessions and closes every one of them.Every client in the package authenticates through a callback. The session speaks plain HTTP, RSC18 refuses basic auth over it, and a token request routed through the session would be counted by the assertions that count requests — so the callback's own client goes straight to the sandbox.
Four SDK defects this found
Rest#requestnever renews an expired token. It is the only call site passingraise_on_error=False(ably/rest/rest.py:145), somake_requestskipsraise_for_responseand returns the 401 instead of raising, and the reactive branch ofreauth_if_expirednever runs. The pre-emptive branch is separately inert becausetoken_details_has_expired()returns False with no time offset. The same expired token renews correctly throughpublish(). Gates RSC10.enter_clientis impossible on an anonymous connection. The server answers basic auth withclientId: "*", and the branch guarding a configured clientId against a server wildcard (ably/rest/auth.py:335-353) fires whenoriginal_client_idisNone, recording the client id as validated andNone.can_assume_client_idthen refuses every id, and theis Noneescape is unreachable. RSA7b4 says it should become'*'. One line from a fix; every test needing presence on an anonymous connection passesclient_id='*'around it.httpRequestTimeoutis applied as seconds where the specification counts milliseconds.ably/http/http.py:193hands(http_open_timeout, http_request_timeout)tohttpx, which reads seconds, so the specification'shttpRequestTimeout: 3000is a three-thousand-second deadline. Measured against a proxy session delaying/timeby twenty seconds: the request sat out the whole delay and succeeded on the primary host, attempting no fallback, wherehttp_request_timeout=3timed out at 3.1 seconds and the fallback retry succeeded. The defaults come out right by coincidence — 4 and 10 seconds are TO3l3's and TO3l4's 4000 and 10000 ms — so only a client that configures the option is affected, which is why the file recorded this twice as an internal difference readable off the options object. It is not internal. Distinct from the already-filed #709, which is about the same value bounding one socket read rather than the request. Gates RSC15l2.Push admin's snake_case filters return everything, not nothing. The server drops an unrecognised query parameter rather than rejecting it, so
list(client_id=x)is the whole unfiltered page — measured 2 / 3 / 3 for camelCase, snake_case and unfiltered. A test asserting that the row it just created is present passes with the filter doing nothing, so every filtered list here carries a control proving it narrowed.Four specification faults, not filed
push_channels.mdhard-codes"test-device-identity-token", which the sandbox rejects 40005. Its own comment says the token comes from the registration response. This test could never have passed as written, whatever the SDK did.batch_presence.md's restricted-key test ends its setup withAWAIT realtime.close()and then asserts on the presence that close destroys. The file's other two tests get this right and say so.presence.md's RSP4b2 has the same misplaced close, which produces a data-less LEAVE that lands asitems[0]and breaks the specification's own== "third".RSL2b3's four assertions all hold with the time range dropped entirely. The derived test keeps them and adds the converse they omit.Ten more gated tests, on root causes already recorded
Auth#revokeTokens,Rest#batchPresence, thePushChannelsurface and theclientIdfilter onRestPresence#getdo not exist in ably-python. The unit tiers already record all four, so these extend those entries rather than opening new ones, and gate on the same spellings so both tiers go green together when an API lands.The gated halves are not stubs. Their setups run against the sandbox, and where the assertions sit behind a missing API they were checked against the endpoint directly — which moved two of them: a revoked token does not leave the connection DISCONNECTED with 40141 here, because the client the specification builds holds only a
TokenDetailsand cannot re-authorise, so RSA4a fails it with 40171 instead. Left as written, all four revocation tests would have failed for a second, unrecorded reason on the day the API landed.🤖 Generated with Claude Code
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