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"""Test migrations that alter tables adding/removing columns."""
from contextlib import closing
import pytest
import sqlite3
from gn3.migrations import get_migration, apply_migrations, rollback_migrations
from tests.unit.auth.conftest import (
apply_single_migration, rollback_single_migration, migrations_up_to)
query = "SELECT sql FROM sqlite_schema WHERE name=?"
test_params = (
("20221109_01_HbD5F-add-resource-meta-field-to-resource-categories-field.py",
"resource_categories", "resource_meta TEXT", True),
("20221110_08_23psB-add-privilege-category-and-privilege-description-columns-to-privileges-table.py",
"privileges", "privilege_category TEXT", True),
("20221110_08_23psB-add-privilege-category-and-privilege-description-columns-to-privileges-table.py",
"privileges", "privilege_description TEXT", True))
def found(haystack: str, needle: str) -> bool:
return any([
(line.strip().find(needle) >= 0) for line in haystack.split("\n")])
def pristine_before_migration(adding: bool, result_str: str, column: str) -> bool:
col_was_found = found(result_str, column)
if adding:
return not col_was_found
return col_was_found
def applied_successfully(adding: bool, result_str: str, column: str) -> bool:
col_was_found = found(result_str, column)
if adding:
return col_was_found
return not col_was_found
@pytest.mark.unit_test
@pytest.mark.parametrize(
"migration_file,the_table,the_column,adding", test_params)
def test_apply_add_remove_column(
auth_migrations_dir, auth_testdb_path, backend, migration_file,
the_table, the_column, adding):
"""
GIVEN: A migration that alters a table, adding or removing a column
WHEN: The migration is applied
THEN: Ensure the column exists if `adding` is True, otherwise, ensure the
column has been dropped
"""
migration_path = f"{auth_migrations_dir}/{migration_file}"
older_migrations = migrations_up_to(migration_path, auth_migrations_dir)
the_migration = get_migration(migration_path)
apply_migrations(backend, older_migrations)
with closing(sqlite3.connect(auth_testdb_path)) as conn, closing(conn.cursor()) as cursor:
cursor.execute(query, (the_table,))
results_before_migration = cursor.fetchone()
apply_single_migration(backend, the_migration)
cursor.execute(query, (the_table,))
results_after_migration = cursor.fetchone()
rollback_migrations(backend, older_migrations + [the_migration])
assert pristine_before_migration(
adding, results_before_migration[0], the_column), (
"Database inconsistent before applying migration.")
assert applied_successfully(
adding, results_after_migration[0], the_column), "Migration failed"
@pytest.mark.unit_test
@pytest.mark.parametrize(
"migration_file,the_table,the_column,adding", test_params)
def test_rollback_add_remove_column(
auth_migrations_dir, auth_testdb_path, backend, migration_file,
the_table, the_column, adding):
"""
GIVEN: A migration that alters a table, adding or removing a column
WHEN: The migration is applied
THEN: Ensure the column is dropped if `adding` is True, otherwise, ensure
the column has been restored
"""
migration_path = f"{auth_migrations_dir}/{migration_file}"
older_migrations = migrations_up_to(migration_path, auth_migrations_dir)
the_migration = get_migration(migration_path)
apply_migrations(backend, older_migrations)
apply_single_migration(backend, the_migration)
with closing(sqlite3.connect(auth_testdb_path)) as conn, closing(conn.cursor()) as cursor:
cursor.execute(query, (the_table,))
results_before_migration = cursor.fetchone()
rollback_single_migration(backend, the_migration)
cursor.execute(query, (the_table,))
results_after_migration = cursor.fetchone()
rollback_migrations(backend, older_migrations + [the_migration])
assert pristine_before_migration(
not adding, results_before_migration[0], the_column), (
"Database inconsistent before applying migration.")
assert applied_successfully(
not adding, results_after_migration[0], the_column), "Migration failed"
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