"""Validation logic tests."""

import unittest

from manualadjustment import constants
from manualadjustment.logic import manual_adjustment


class TestGetParamValidation(unittest.TestCase):
    """Test validation of GET /manual_adjustment input parameters."""

    def test_validation_success(self):
        """Assert that a valid set of params returns success."""
        res = manual_adjustment.validate_params(
            parent_id=1, parent_type='vendor',
            page_offset=0, page_limit=1)
        self.assertTrue(res.success)

    def test_null_parent_id(self):
        """Verify that null parent_id returns error."""
        res = manual_adjustment.validate_params(
            parent_id=None, parent_type='vendor', page_offset=0,
            page_limit=1)
        self.assertEqual(res.status, 400)

    def test_null_parent_type(self):
        """Verify that null parent_type returns error."""
        res = manual_adjustment.validate_params(
            parent_id=1, parent_type=None, page_offset=0,
            page_limit=1)
        self.assertEqual(res.status, 400)

    def test_neg_page_offset(self):
        """Verify that negative page offset returns error."""
        res = manual_adjustment.validate_params(
            parent_id=1, parent_type='vendor', page_offset=-1,
            page_limit=1)
        self.assertEqual(res.status, 400)

    def test_neg_page_limit(self):
        """Verify that negative page limit returns error."""
        res = manual_adjustment.validate_params(
            parent_id=1, parent_type='vendor', page_offset=0,
            page_limit=-11)
        self.assertEqual(res.status, 400)

    def test_exceed_max_page_limit(self):
        """Verify that exceeding max page limit returns error."""
        res = manual_adjustment.validate_params(
            parent_id=1, parent_type='vendor', page_offset=0,
            page_limit=constants.PAGE_LIMIT_MAX_ACCEPTABLE + 1)
        self.assertEqual(res.status, 400)

    def test_meet_max_page_limit(self):
        """Vefify that meeting max page limit returns success."""
        res = manual_adjustment.validate_params(
            parent_id=1, parent_type='vendor',
            page_offset=0, page_limit=constants.PAGE_LIMIT_MAX_ACCEPTABLE)
        self.assertTrue(res.success)