def issue_voucher(self, request, voucher_pool):
[request_id] = request.args['request_id']
[operator] = request.args['operator']
[denomination] = request.args['denomination']
conn = yield self.engine.connect()
pool = VoucherPool(voucher_pool, conn)
try:
voucher = yield pool.issue_voucher(operator, denomination)
except NoVoucherPool:
request.setResponseCode(404)
returnValue(json.dumps({
'request_id': request_id,
'error': 'Voucher pool does not exist.',
}))
except NoVoucherAvailable:
# This is a normal condition, so we still return a 200 OK.
returnValue(json.dumps({
'request_id': request_id,
'error': 'No voucher available.',
}))
finally:
yield conn.close()
request.setHeader('Content-Type', 'application/json')
returnValue(json.dumps({
'request_id': request_id,
'voucher': voucher['voucher'],
}))
def test_issue_voucher(self):
pool = VoucherPool('testpool', self.conn)
self.populate_pool(pool, ['Tank'], ['red'], [0])
rows = self.successResultOf(pool.count_vouchers())
assert rows == [('Tank', 'red', False, 1)]
voucher = self.successResultOf(pool.issue_voucher('Tank', 'red'))
assert voucher['operator'] == 'Tank'
assert voucher['denomination'] == 'red'
assert voucher['voucher'] == 'Tank-red-0'
rows = self.successResultOf(pool.count_vouchers())
assert rows == [('Tank', 'red', True, 1)]
self.failureResultOf(
pool.issue_voucher('Tank', 'red'), NoVoucherAvailable)
