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import ./make-test-python.nix ({ pkgs, lib, ... }: {
name = "pg_anonymizer";
meta.maintainers = lib.teams.flyingcircus.members;
nodes.machine = { pkgs, ... }: {
environment.systemPackages = [ pkgs.pg-dump-anon ];
services.postgresql = {
enable = true;
extraPlugins = ps: [ ps.anonymizer ];
settings.shared_preload_libraries = "anon";
};
};
testScript = ''
start_all()
machine.wait_for_unit("multi-user.target")
machine.wait_for_unit("postgresql.service")
with subtest("Setup"):
machine.succeed("sudo -u postgres psql --command 'create database demo'")
machine.succeed(
"sudo -u postgres psql -d demo -f ${pkgs.writeText "init.sql" ''
create extension anon cascade;
select anon.init();
create table player(id serial, name text, points int);
insert into player(id,name,points) values (1,'Foo', 23);
insert into player(id,name,points) values (2,'Bar',42);
security label for anon on column player.name is 'MASKED WITH FUNCTION anon.fake_last_name();';
security label for anon on column player.points is 'MASKED WITH VALUE NULL';
''}"
)
def get_player_table_contents():
return [
x.split(',') for x in machine.succeed("sudo -u postgres psql -d demo --csv --command 'select * from player'").splitlines()[1:]
]
def check_anonymized_row(row, id, original_name):
assert row[0] == id, f"Expected first row to have ID {id}, but got {row[0]}"
assert row[1] != original_name, f"Expected first row to have a name other than {original_name}"
assert not bool(row[2]), "Expected points to be NULL in first row"
def find_xsv_in_dump(dump, sep=','):
"""
Expecting to find a CSV (for pg_dump_anon) or TSV (for pg_dump) structure, looking like
COPY public.player ...
1,Shields,
2,Salazar,
\.
in the given dump (the commas are tabs in case of pg_dump).
Extract the CSV lines and split by `sep`.
"""
try:
from itertools import dropwhile, takewhile
return [x.split(sep) for x in list(takewhile(
lambda x: x != "\\.",
dropwhile(
lambda x: not x.startswith("COPY public.player"),
dump.splitlines()
)
))[1:]]
except:
print(f"Dump to process: {dump}")
raise
def check_original_data(output):
assert output[0] == ['1','Foo','23'], f"Expected first row from player table to be 1,Foo,23; got {output[0]}"
assert output[1] == ['2','Bar','42'], f"Expected first row from player table to be 2,Bar,42; got {output[1]}"
def check_anonymized_rows(output):
check_anonymized_row(output[0], '1', 'Foo')
check_anonymized_row(output[1], '2', 'Bar')
with subtest("Check initial state"):
check_original_data(get_player_table_contents())
with subtest("Anonymous dumps"):
check_original_data(find_xsv_in_dump(
machine.succeed("sudo -u postgres pg_dump demo"),
sep='\t'
))
check_anonymized_rows(find_xsv_in_dump(
machine.succeed("sudo -u postgres pg_dump_anon -U postgres -h /run/postgresql -d demo"),
sep=','
))
with subtest("Anonymize"):
machine.succeed("sudo -u postgres psql -d demo --command 'select anon.anonymize_database();'")
check_anonymized_rows(get_player_table_contents())
'';
})
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