import unittest

import json

from app import app

class TestApp(unittest.TestCase):

    def setUp(self):

        self.app = app.test_client()

        self.app.testing = True

    def test_create_item(self):

        data = {‘name’:‘New Item’}

        response = self.app.post(‘/api/items’, json=data)

        result = json.loads(response.data.decode(‘utf-8’))

        self.assertEqual(response.status_code, 201)

        self.assertEqual(result[‘message’], ‘Item created successfully’)

    def test_create_item_with_missing_name(self):

        data = {}

        response = self.app.post(‘/api/items’, json=data)

        result = json.loads(response.data.decode(‘utf-8’))

        self.assertEqual(response.status_code, 400)

        self.assertIn(‘error’, result)

    def test_get_all_items(self):

        response = self.app.get(‘/api/items’)

        result = json.loads(response.data.decode(‘utf-8’))

        self.assertEqual(response.status_code, 200)

        self.assertIn(‘items’, result)

    def test_create_items_and_get_count(self):

        response = self.app.get(‘/api/items’)

        items_count = json.loads(response.data.decode(‘utf-8’))

        items_count_before_test = len(items_count.get(‘items’,[]))

        # Create `n` additional items

        n = 5

        for i in range(n):

            data = {

                    ‘name’: f‘Item-{i+1}’

                    }

            self.app.post(‘/api/items’, json=data)

        # Get all items:

        response = self.app.get(‘/api/items’)

        result = json.loads(response.data.decode(‘utf-8’))

        self.assertEqual(response.status_code, 200)

        # Check the if the count() is `n`:

        items_count = len(result.get(‘items’, []))

        self.assertEqual(items_count, n + items_count_before_test)

if __name__ == ‘__main__’:

    unittest.main()