e48373382f
For some reason, the passt/pasta tests and examples use dhclient for DHCPv6, but in most cases use udhcpc for DHCPv4. Change it to use dhclient for both DHCPv4 and DHCPv6. This means one less tool we need for testing, plus dhclient is easily available on Fedora whereas udhcpc is not. Note that the passt tests still rely on udhcpc indirectly because mbuto wants to put it into the guest images it generates. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
100 lines
3.1 KiB
Markdown
100 lines
3.1 KiB
Markdown
<!---
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SPDX-License-Identifier: AGPL-3.0-or-later
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Copyright (c) 2021-2022 Red Hat GmbH
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Author: Stefano Brivio <sbrivio@redhat.com>
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-->
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# Scope
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This directory contains test cases for _passt_ and _pasta_ and a simple
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POSIX shell-based framework to define them, and run them as a suite.
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These tests can be run as part of a continuous integration workflow, and are
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also used to provide short usage demos, with video recording, for _passt_ and
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_pasta_ basic use cases.
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# Run
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## Dependencies
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### Packages
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The tests require some package dependencies commonly available in Linux
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distributions. If some packages are not available, the test groups that need
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them will be selectively skipped.
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This is a non-exhaustive list of packages that might not commonly be installed
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on a system, i.e. common utilities such as a shell are not included here.
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Example for Debian, and possibly most Debian-based distributions:
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build-essential git jq strace iperf3 qemu-system-x86 tmux sipcalc bc
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clang-tidy cppcheck isc-dhcp-common psmisc linux-cpupower
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netcat-openbsd fakeroot lz4 lm-sensors qemu-system-arm qemu-system-ppc
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qemu-system-misc qemu-system-x86 valgrind
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### Other tools
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Test measuring request-response and connect-request-response latencies use
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`neper`, which is not commonly packaged by distributions and needs to be built
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and installed manually:
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git clone https://github.com/google/neper
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cd neper; make
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cp tcp_crr tcp_rr udp_rr /usr/local/bin
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Virtual machine images are built during test executions using
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[mbuto](https://mbuto.lameexcu.se/), the shell script is sourced via _git_
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as needed, so there's no need to actually install it.
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### Special requirements for continuous integration and demo modes
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Running the test suite as continuous integration or demo modes will record the
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terminal with the steps being executed, using asciinema(1), and create binary
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packages.
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The following additional packages are commonly needed:
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alien asciinema linux-perf tshark
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## Regular test
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Just issue:
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./run
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from the `test` directory. Elevated privileges are not needed. Environment
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variable settings: DEBUG=1 enables debugging messages, TRACE=1 enables tracing
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(further debugging messages), PCAP=1 enables packet captures. Example:
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PCAP=1 TRACE=1 ./run
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## Continuous integration
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Issuing:
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./ci
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will run the whole test suite while recording the execution, and it will also
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build JavaScript fragments used on http://passt.top/ for performance data tables
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and links to specific offsets in the captures.
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## Demo mode
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Issuing:
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./demo
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will run the demo cases under `demo`, with terminal captures as well.
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# Framework
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The implementation of the testing framework is under `lib`, and it provides
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facilities for terminal and _tmux_ session management, interpretation of test
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directives, video recording, and suchlike. Test cases are organised in the
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remaining directories.
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Test cases can be implemented as POSIX shell scripts, or as a set of directives,
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which are not formally documented here, but should be clear enough from the
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existing cases. The entry point for interpretation of test directives is
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implemented in `lib/test`.
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