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175 lines
6.7 KiB
175 lines
6.7 KiB
12 years ago
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Test suite runner for V8, including support for distributed running.
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====================================================================
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Local usage instructions:
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=========================
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Run the main script with --help to get detailed usage instructions:
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$ tools/run-tests.py --help
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The interface is mostly the same as it was for the old test runner.
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You'll likely want something like this:
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$ tools/run-tests.py --nonetwork --arch ia32 --mode release
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--nonetwork is the default on Mac and Windows. If you don't specify --arch
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and/or --mode, all available values will be used and run in turn (e.g.,
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omitting --mode from the above example will run ia32 in both Release and Debug
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modes).
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Networked usage instructions:
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=============================
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Networked running is only supported on Linux currently. Make sure that all
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machines participating in the cluster are binary-compatible (e.g. mixing
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Ubuntu Lucid and Precise doesn't work).
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Setup:
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------
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1.) Copy tools/test-server.py to a new empty directory anywhere on your hard
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drive (preferably not inside your V8 checkout just to keep things clean).
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Please do create a copy, not just a symlink.
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2.) Navigate to the new directory and let the server setup itself:
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$ ./test-server.py setup
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This will install PIP and UltraJSON, create a V8 working directory, and
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generate a keypair.
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3.) Swap public keys with someone who's already part of the networked cluster.
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$ cp trusted/`cat data/mypubkey`.pem /where/peers/can/see/it/myname.pem
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$ ./test-server.py approve /wherever/they/put/it/yourname.pem
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Usage:
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------
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1.) Start your server:
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$ ./test-server.py start
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2.) (Optionally) inspect the server's status:
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$ ./test-server.py status
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3.) From your regular V8 working directory, run tests:
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$ tool/run-tests.py --arch ia32 --mode debug
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4.) (Optionally) enjoy the speeeeeeeeeeeeeeeed
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Architecture overview:
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======================
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Code organization:
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------------------
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This section is written from the point of view of the tools/ directory.
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./run-tests.py:
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Main script. Parses command-line options and drives the test execution
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procedure from a high level. Imports the actual implementation of all
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steps from the testrunner/ directory.
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./test-server.py:
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Interface to interact with the server. Contains code to setup the server's
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working environment and can start and stop server daemon processes.
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Imports some stuff from the testrunner/server/ directory.
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./testrunner/local/*:
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Implementation needed to run tests locally. Used by run-tests.py. Inspired by
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(and partly copied verbatim from) the original test.py script.
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./testrunner/local/old_statusfile.py:
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Provides functionality to read an old-style <testsuite>.status file and
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convert it to new-style syntax. This can be removed once the new-style
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syntax becomes authoritative (and old-style syntax is no longer supported).
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./status-file-converter.py provides a stand-alone interface to this.
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./testrunner/objects/*:
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A bunch of data container classes, used by the scripts in the various other
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directories; serializable for transmission over the network.
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./testrunner/network/*:
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Equivalents and extensions of some of the functionality in ./testrunner/local/
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as required when dispatching tests to peers on the network.
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./testrunner/network/network_execution.py:
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Drop-in replacement for ./testrunner/local/execution that distributes
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test jobs to network peers instead of running them locally.
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./testrunner/network/endpoint.py:
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Receiving end of a network distributed job, uses the implementation
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in ./testrunner/local/execution.py for actually running the tests.
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./testrunner/server/*:
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Implementation of the daemon that accepts and runs test execution jobs from
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peers on the network. Should ideally have no dependencies on any of the other
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directories, but that turned out to be impractical, so there are a few
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exceptions.
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./testrunner/server/compression.py:
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Defines a wrapper around Python TCP sockets that provides JSON based
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serialization, gzip based compression, and ensures message completeness.
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Networking architecture:
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------------------------
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The distribution stuff is designed to be a layer between deciding which tests
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to run on the one side, and actually running them on the other. The frontend
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that the user interacts with is the same for local and networked execution,
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and the actual test execution and result gathering code is the same too.
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The server daemon starts four separate servers, each listening on another port:
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- "Local": Communication with a run-tests.py script running on the same host.
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The test driving script e.g. needs to ask for available peers. It then talks
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to those peers directly (one of them will be the locally running server).
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- "Work": Listens for test job requests from run-tests.py scripts on the network
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(including localhost). Accepts an arbitrary number of connections at the
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same time, but only works on them in a serialized fashion.
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- "Status": Used for communication with other servers on the network, e.g. for
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exchanging trusted public keys to create the transitive trust closure.
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- "Discovery": Used to detect presence of other peers on the network.
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In contrast to the other three, this uses UDP (as opposed to TCP).
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Give us a diagram! We love diagrams!
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------------------------------------
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.
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Machine A . Machine B
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.
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+------------------------------+ .
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| run-tests.py | .
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| with flag: | .
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|--nonetwork --network | .
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| | / | | .
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| | / | | .
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| v / v | .
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|BACKEND / distribution | .
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+--------- / --------| \ ------+ .
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/ | \_____________________
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/ | . \
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/ | . \
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+----- v ----------- v --------+ . +---- v -----------------------+
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| LocalHandler | WorkHandler | . | WorkHandler | LocalHandler |
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| | | | . | | | |
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| | v | . | v | |
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| | BACKEND | . | BACKEND | |
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|------------- +---------------| . |---------------+--------------|
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| Discovery | StatusHandler <----------> StatusHandler | Discovery |
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+---- ^ -----------------------+ . +-------------------- ^ -------+
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| . |
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+---------------------------------------------------------+
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Note that the three occurrences of "BACKEND" are the same code
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(testrunner/local/execution.py and its imports), but running from three
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distinct directories (and on two different machines).
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