Added import_serial_numbers command test.

lms/djangoapps/licenses/tests.py

+import logging
+from uuid import uuid4
+from random import shuffle
+from tempfile import NamedTemporaryFile
+
+from django.test import TestCase
+from django.core.management import call_command
+
+from models import CourseSoftware, UserLicense
+
+COURSE_1 = 'MITx/6.002x/2012_Fall'
+
+SOFTWARE_1 = 'matlab'
+SOFTWARE_2 = 'stata'
+
+log = logging.getLogger(__name__)
+
+
+class CommandTest(TestCase):
+    def test_import_serial_numbers(self):
+        size = 20
+
+        log.debug('Adding one set of serials for {0}'.format(SOFTWARE_1))
+        with generate_serials_file(size) as temp_file:
+            args = [COURSE_1, SOFTWARE_1, temp_file.name]
+            call_command('import_serial_numbers', *args)
+
+        log.debug('Adding one set of serials for {0}'.format(SOFTWARE_2))
+        with generate_serials_file(size) as temp_file:
+            args = [COURSE_1, SOFTWARE_2, temp_file.name]
+            call_command('import_serial_numbers', *args)
+
+        log.debug('There should be only 2 course-software entries')
+        software_count = CourseSoftware.objects.all().count()
+        self.assertEqual(2, software_count)
+
+        log.debug('We added two sets of {0} serials'.format(size))
+        licenses_count = UserLicense.objects.all().count()
+        self.assertEqual(2 * size, licenses_count)
+
+        log.debug('Adding more serial numbers to {0}'.format(SOFTWARE_1))
+        with generate_serials_file(size) as temp_file:
+            args = [COURSE_1, SOFTWARE_1, temp_file.name]
+            call_command('import_serial_numbers', *args)
+
+        log.debug('There should be still only 2 course-software entries')
+        software_count = CourseSoftware.objects.all().count()
+        self.assertEqual(2, software_count)
+
+        log.debug('Now we should have 3 sets of 20 serials'.format(size))
+        licenses_count = UserLicense.objects.all().count()
+        self.assertEqual(3 * size, licenses_count)
+
+        cs = CourseSoftware.objects.get(pk=1)
+
+        lics = UserLicense.objects.filter(software=cs)[:size]
+        known_serials = list(l.serial for l in lics)
+        known_serials.extend(generate_serials(10))
+
+        shuffle(known_serials)
+
+        log.debug('Adding some new and old serials to {0}'.format(SOFTWARE_1))
+        with NamedTemporaryFile() as f:
+            f.write('\n'.join(known_serials))
+            f.flush()
+            args = [COURSE_1, SOFTWARE_1, f.name]
+            call_command('import_serial_numbers', *args)
+
+        log.debug('Check if we added only the new ones')
+        licenses_count = UserLicense.objects.filter(software=cs).count()
+        self.assertEqual((2 * size) + 10, licenses_count)
+
+
+def generate_serials(size=20):
+    return [str(uuid4()) for _ in range(size)]
+
+
+def generate_serials_file(size=20):
+    serials = generate_serials(size)
+
+    temp_file = NamedTemporaryFile()
+    temp_file.write('\n'.join(serials))
+    temp_file.flush()
+
+    return temp_file