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# -------------------------------------------------------------------------
# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License. See LICENSE.txt in the project root for
# license information.
# -------------------------------------------------------------------------
import re
from corehttp.paging import ItemPaged
from corehttp.exceptions import HttpResponseError
import pytest
class TestPaging(object):
def test_basic_paging(self):
def get_next(continuation_token=None):
"""Simplify my life and return JSON and not response, but should be response."""
if not continuation_token:
return {"nextLink": "page2", "value": ["value1.0", "value1.1"]}
else:
return {"nextLink": None, "value": ["value2.0", "value2.1"]}
def extract_data(response):
return response["nextLink"], iter(response["value"])
pager = ItemPaged(get_next, extract_data)
result_iterated = list(pager)
assert ["value1.0", "value1.1", "value2.0", "value2.1"] == result_iterated
def test_by_page_paging(self):
def get_next(continuation_token=None):
"""Simplify my life and return JSON and not response, but should be response."""
if not continuation_token:
return {"nextLink": "page2", "value": ["value1.0", "value1.1"]}
else:
return {"nextLink": None, "value": ["value2.0", "value2.1"]}
def extract_data(response):
return response["nextLink"], iter(response["value"])
pager = ItemPaged(get_next, extract_data).by_page()
page1 = next(pager)
assert list(page1) == ["value1.0", "value1.1"]
page2 = next(pager)
assert list(page2) == ["value2.0", "value2.1"]
with pytest.raises(StopIteration):
next(pager)
def test_advance_paging(self):
def get_next(continuation_token=None):
"""Simplify my life and return JSON and not response, but should be response."""
if not continuation_token:
return {"nextLink": "page2", "value": ["value1.0", "value1.1"]}
else:
return {"nextLink": None, "value": ["value2.0", "value2.1"]}
def extract_data(response):
return response["nextLink"], iter(response["value"])
pager = ItemPaged(get_next, extract_data)
page1 = next(pager)
assert page1 == "value1.0"
page1 = next(pager)
assert page1 == "value1.1"
page2 = next(pager)
assert page2 == "value2.0"
page2 = next(pager)
assert page2 == "value2.1"
with pytest.raises(StopIteration):
next(pager)
def test_none_value(self):
def get_next(continuation_token=None):
return {"nextLink": None, "value": None}
def extract_data(response):
return response["nextLink"], iter(response["value"] or [])
pager = ItemPaged(get_next, extract_data)
result_iterated = list(pager)
assert len(result_iterated) == 0
def test_print(self):
def get_next(continuation_token=None):
return {"nextLink": None, "value": None}
def extract_data(response):
return response["nextLink"], iter(response["value"] or [])
pager = ItemPaged(get_next, extract_data)
output = repr(pager)
assert re.match("<iterator object .*\\.ItemPaged at", output)
def test_paging_continue_on_error(self):
def get_next(continuation_token=None):
if not continuation_token:
return {"nextLink": "foo", "value": ["bar"]}
else:
raise HttpResponseError()
def extract_data(response):
return response["nextLink"], iter(response["value"] or [])
pager = ItemPaged(get_next, extract_data)
assert next(pager) == "bar"
with pytest.raises(HttpResponseError) as err:
next(pager)
assert err.value.continuation_token == "foo"
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