nix-bitcoin/test/lib/make-test.nix
Erik Arvstedt 44439e2a81
tests: optimize building multiple tests at once
The result of `import tests.nix {}` is now an attrset of tests.
This makes it easier and more efficient to evaluate or build multiple
tests in one call to `nix build`.

Simplify tests.nix by removing the large module args scope in favor of
self-contained scenario module definitions.

Add CPU core and memory size defaults to the test configuration to
enable building tests without `run-tests.sh`.

Add the following top-level args to tests.nix:
- `extraScenarios` to provide a nix-level way to define extra scenarios.
- `pkgs` to allow building tests with custom pkgs or systems.
2021-03-22 14:35:29 +01:00

66 lines
1.5 KiB
Nix

pkgs:
let
makeVM = import ./make-test-vm.nix pkgs;
inherit (pkgs) lib;
in
name: testConfig:
{
vm = makeVM {
name = "nix-bitcoin-${name}";
machine = {
imports = [ testConfig ];
virtualisation = {
# Needed because duplicity requires 270 MB of free temp space, regardless of backup size
diskSize = 1024;
# Min. 800 MiB needed to avoid 'out of memory' errors
memorySize = lib.mkDefault 2048;
cores = lib.mkDefault 2;
};
};
testScript = nodes: let
cfg = nodes.nodes.machine.config;
data = {
data = cfg.test.data;
tests = cfg.tests;
};
dataFile = pkgs.writeText "test-data" (builtins.toJSON data);
initData = ''
import json
with open("${dataFile}") as f:
data = json.load(f)
enabled_tests = set(test for (test, enabled) in data["tests"].items() if enabled)
test_data = data["data"]
'';
in
builtins.concatStringsSep "\n\n" [
initData
(builtins.readFile ./../tests.py)
# Don't run tests in interactive mode.
# is_interactive is set in ../run-tests.sh
''
if not "is_interactive" in vars():
run_tests()
''
];
};
container = {
# The container name has a 11 char length limit
containers.nb-test = { config, ... }: {
config = {
extra = config.config.test.container;
config = testConfig;
};
};
};
config = testConfig;
}