podman/test/apiv2
Ed Santiago f5b3dc976c Tests: Fix common flakes, and improve apiv2 test log
- apiv2 - the 'ten /info requests' test is flaking often,
  taking ~8 seconds (our limit is 7, up from 5 a few weeks
  ago). Brent suggested that the first /info call might be
  expensive, because it needs to access storage. So, let's
  prime it by running one /info outside the timing loop.
  And, because even that continues to fail, bump it up
  to 10 seconds and file #8076 to track the slowdown.

- toolbox test - WaitForReady() has timed out, even on one
  occasion causing a run failure because it failed 3 times.
  Solution: bump up timeout from 2s to 5s. Not really great,
  but CI systems are underpowered, and it's not unreasonable
  that 2s might be too low.

- sdnotify test - add a 'podman wait' between stop & rm.
  This may prevent a "cannot rm container as it is running"
  race condition.

While working on this, Brent and I noticed a few ways that
test-apiv2 logging can be improved:

- test name: when request is POST, display the jsonified
  parameters, not the original input ones. This should
  make it much easier to reproduce failures.

- use curl's "--write-out" option to capture http code,
  content type, and request time. We were getting the
  first two via grep from logged headers; this is cleaner.
  And there was no other way to get timing. We now include
  the timing as X-Response-Time in the log file.

- abort on *any* curl error, not just 7 (cannot connect).
  Any error at all from curl is bad news.

Signed-off-by: Ed Santiago <santiago@redhat.com>
2020-10-20 11:32:49 -06:00
..
rest_api Restore 'id' stanza in pull results 2020-09-21 08:51:52 -07:00
00-TEMPLATE Tests for API v2 2020-01-17 09:59:22 -07:00
01-basic.at Tests: Fix common flakes, and improve apiv2 test log 2020-10-20 11:32:49 -06:00
10-images.at APIv2 tests: get them passing again 2020-10-12 08:45:39 -06:00
12-imagesMore.at APIv2 tests: get them passing again 2020-10-12 08:45:39 -06:00
20-containers.at APIv2 tests: get them passing again 2020-10-12 08:45:39 -06:00
22-stop.at APIv2 tests: add tests for stop 2020-03-03 06:40:27 -07:00
25-containersMore.at APIv2 test: add more tests for containers 2020-09-01 04:00:39 -04:00
30-volumes.at Tests for API v2 2020-01-17 09:59:22 -07:00
35-networks.at APIv2 tests: try again to fix them 2020-10-12 13:57:59 -06:00
40-pods.at APIv2 tests: get them passing again 2020-10-12 08:45:39 -06:00
README.md Tests for API v2 2020-01-17 09:59:22 -07:00
test-apiv2 Tests: Fix common flakes, and improve apiv2 test log 2020-10-20 11:32:49 -06:00

API v2 tests

This directory contains tests for the podman version 2 API (HTTP).

Tests themselves are in files of the form 'NN-NAME.at' where NN is a two-digit number, NAME is a descriptive name, and '.at' is just an extension I picked.

Running Tests

The main test runner is test-apiv2. Usage is:

$ sudo ./test-apiv2 [NAME [...]]

...where NAME is one or more optional test names, e.g. 'image' or 'pod' or both. By default, test-apiv2 will invoke all *.at tests.

test-apiv2 connects to localhost only and via TCP. There is no support here for remote hosts or for UNIX sockets. This is a framework for testing the API, not all possible protocols.

test-apiv2 will start the service if it isn't already running.

Writing Tests

The main test function is t. It runs curl against the server, with POST parameters if present, and compares return status and (optionally) string results from the server:

t GET /_ping 200 OK
  ^^^ ^^^^^^ ^^^ ^^
  |   |      |   +--- expected string result
  |   |      +------- expected return code
  |   +-------------- endpoint to access
  +------------------ method (GET, POST, DELETE, HEAD)


t POST libpod/volumes/create name=foo 201 .ID~[0-9a-f]\\{12\\}
       ^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^ ^^^ ^^^^^^^^^^^^^^^^^^^^
       |                     |        |   JSON '.ID': expect 12-char hex
       |                     |        +-- expected code
       |                     +----------- POST params
       +--------------------------------- note the missing slash

Notes:

  • If the endpoint has a leading slash (/_ping), t leaves it unchanged. If there's no leading slash, t prepends /v1.40. This is a simple convenience for simplicity of writing tests.

  • When method is POST, the argument after the endpoint must be a series of POST arguments in the form 'key=value', separated by commas. t will convert those to JSON form for passing to the server.

  • The final arguments are one or more expected string results. If an argument starts with a dot, t will invoke jq on the output to fetch that field, and will compare it to the right-hand side of the argument. If the separator is = (equals), t will require an exact match; if ~ (tilde), t will use expr to compare.