hydra/t/lib/HydraTestContext.pm

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use strict;
use warnings;
package HydraTestContext;
use File::Path qw(make_path);
use File::Basename;
use Cwd qw(abs_path getcwd);
use CliRunners;
use Hydra::Helper::Exec;
# Set up the environment for running tests.
#
# Hash Parameters:
#
# * hydra_config: configuration for the Hydra processes for your test.
# * nix_config: text to include in the test's nix.conf
# * use_external_destination_store: Boolean indicating whether hydra should
# use a destination store different from the evaluation store.
# True by default.
# * before_init: a sub which is called after the database is up, but before
# hydra-init is executed. It receives the HydraTestContext object as
# its argument.
#
# This clears several environment variables and sets them to ephemeral
# values: a temporary database, temporary Nix store, temporary Hydra
# data directory, etc.
#
# Note: This function must run _very_ early, before nearly any Hydra
# libraries are loaded. To use this, you very likely need to `use Setup`
# and then run `test_init`, and then `require` the Hydra libraries you
# need.
#
# It returns a tuple: a handle to a temporary directory and a handle to
# the postgres service. If either of these variables go out of scope,
# those resources are released and the test environment becomes invalid.
#
# Look at the top of an existing `.t` file to see how this should be used
# in practice.
sub new {
my ($class, %opts) = @_;
my $deststoredir;
# Cleanup will be managed by yath. By the default it will be cleaned
# up, but can be kept to aid in debugging test failures.
my $dir = File::Temp->newdir(CLEANUP => 0);
$ENV{'HYDRA_DATA'} = "$dir/hydra-data";
mkdir $ENV{'HYDRA_DATA'};
$ENV{'NIX_CONF_DIR'} = "$dir/nix/etc/nix";
make_path($ENV{'NIX_CONF_DIR'});
my $nixconf = "$ENV{'NIX_CONF_DIR'}/nix.conf";
my $nix_config = "sandbox = false\n" . ($opts{'nix_config'} || "");
write_file($nixconf, $nix_config);
$ENV{'HYDRA_CONFIG'} = "$dir/hydra.conf";
my $hydra_config = $opts{'hydra_config'} || "";
$hydra_config = "queue_runner_metrics_address = 127.0.0.1:0\n" . $hydra_config;
if ($opts{'use_external_destination_store'} // 1) {
$deststoredir = "$dir/nix/dest-store";
$hydra_config = "store_uri = file://$dir/nix/dest-store\n" . $hydra_config;
}
write_file($ENV{'HYDRA_CONFIG'}, $hydra_config);
my $nix_store_dir = "$dir/nix/store";
my $nix_state_dir = "$dir/nix/var/nix";
my $nix_log_dir = "$dir/nix/var/log/nix";
$ENV{'NIX_REMOTE_SYSTEMS'} = '';
$ENV{'NIX_REMOTE'} = "local?store=$nix_store_dir&state=$nix_state_dir&log=$nix_log_dir";
$ENV{'NIX_STATE_DIR'} = $nix_state_dir; # FIXME: remove
$ENV{'NIX_STORE_DIR'} = $nix_store_dir; # FIXME: remove
my $pgsql = Test::PostgreSQL->new(
extra_initdb_args => "--locale C.UTF-8"
);
$ENV{'HYDRA_DBI'} = $pgsql->dsn;
my $self = bless {
_db => undef,
db_handle => $pgsql,
tmpdir => $dir,
nix_state_dir => $nix_state_dir,
nix_log_dir => $nix_log_dir,
testdir => abs_path(dirname(__FILE__) . "/.."),
jobsdir => abs_path(dirname(__FILE__) . "/../jobs"),
deststoredir => $deststoredir,
}, $class;
if ($opts{'before_init'}) {
$opts{'before_init'}->($self);
}
expectOkay(5, ("hydra-init"));
return $self;
}
sub db {
my ($self, $setup) = @_;
if (!defined $self->{_db}) {
require Hydra::Schema;
require Hydra::Model::DB;
$self->{_db} = Hydra::Model::DB->new();
if (!(defined $setup && $setup == 0)) {
$self->{_db}->resultset('Users')->create({
username => "root",
emailaddress => 'root@invalid.org',
password => ''
});
}
}
return $self->{_db};
}
sub tmpdir {
my ($self) = @_;
return $self->{tmpdir};
}
sub testdir {
my ($self) = @_;
return $self->{testdir};
}
sub jobsdir {
my ($self) = @_;
return $self->{jobsdir};
}
sub nix_state_dir {
my ($self) = @_;
return $self->{nix_state_dir};
}
# Create a jobset, evaluate it, and optionally build the jobs.
#
# In return, you get a hash of all the Builds records, keyed
# by their Nix attribute name.
#
# This always uses an `expression` from the `jobsdir` directory.
#
# Hash Parameters:
#
# * expression: The file in the jobsdir directory to evaluate
# * jobsdir: An alternative jobsdir to source the expression from
# * build: Bool. Attempt to build all the resulting jobs. Default: false.
sub makeAndEvaluateJobset {
my ($self, %opts) = @_;
my $expression = $opts{'expression'} || die "Mandatory 'expression' option not passed to makeAndEvaluateJobset.\n";
my $jobsdir = $opts{'jobsdir'} // $self->jobsdir;
my $should_build = $opts{'build'} // 0;
my $jobsetCtx = $self->makeJobset(
expression => $expression,
jobsdir => $jobsdir,
);
my $jobset = $jobsetCtx->{"jobset"};
evalSucceeds($jobset) or die "Evaluating jobs/$expression should exit with return code 0.\n";
my $builds = {};
for my $build ($jobset->builds) {
if ($should_build) {
runBuild($build) or die "Build '".$build->job."' from jobs/$expression should exit with return code 0.\n";
$build->discard_changes();
}
$builds->{$build->job} = $build;
}
return $builds;
}
# Create a jobset.
#
# In return, you get a hash of the user, project, and jobset records.
#
# This always uses an `expression` from the `jobsdir` directory.
#
# Hash Parameters:
#
# * expression: The file in the jobsdir directory to evaluate
# * jobsdir: An alternative jobsdir to source the expression from
sub makeJobset {
my ($self, %opts) = @_;
my $expression = $opts{'expression'} || die "Mandatory 'expression' option not passed to makeJobset.\n";
my $jobsdir = $opts{'jobsdir'} // $self->jobsdir;
# Create a new user for this test
my $user = $self->db()->resultset('Users')->create({
username => rand_chars(),
emailaddress => rand_chars() . '@example.org',
password => ''
});
# Create a new project for this test
my $project = $self->db()->resultset('Projects')->create({
name => rand_chars(),
displayname => rand_chars(),
owner => $user->username
});
# Create a new jobset for this test and set up the inputs
my $jobset = $project->jobsets->create({
name => rand_chars(),
nixexprinput => "jobs",
nixexprpath => $expression,
emailoverride => ""
});
my $jobsetinput = $jobset->jobsetinputs->create({name => "jobs", type => "path"});
$jobsetinput->jobsetinputalts->create({altnr => 0, value => $jobsdir});
return {
user => $user,
project => $project,
jobset => $jobset,
};
}
sub DESTROY
{
my ($self) = @_;
$self->db(0)->schema->storage->disconnect();
$self->{db_handle}->stop();
}
sub write_file {
my ($path, $text) = @_;
open(my $fh, '>', $path) or die "Could not open file '$path' $!\n.";
print $fh $text || "";
close $fh;
}
sub rand_chars {
return sprintf("t%08X", rand(0xFFFFFFFF));
}
1;