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from __future__ import annotations
import os
import sys
from io import BytesIO
from pathlib import Path
from typing import TYPE_CHECKING, cast
import pytest
from pexpect.popen_spawn import PopenSpawn
from scrapy.utils.reactor import _asyncio_reactor_path
from tests import NON_EXISTING_RESOLVABLE, tests_datadir
from tests.utils.cmdline import proc
if TYPE_CHECKING:
from tests.mockserver.http import MockServer
class TestShellCommand:
def test_empty(self) -> None:
_, out, _ = proc("shell", "-c", "item")
assert "{}" in out
def test_response_body(self, mockserver: MockServer) -> None:
_, out, _ = proc("shell", mockserver.url("/text"), "-c", "response.body")
assert "Works" in out
def test_response_type_text(self, mockserver: MockServer) -> None:
_, out, _ = proc("shell", mockserver.url("/text"), "-c", "type(response)")
assert "TextResponse" in out
def test_response_type_html(self, mockserver: MockServer) -> None:
_, out, _ = proc("shell", mockserver.url("/html"), "-c", "type(response)")
assert "HtmlResponse" in out
def test_response_selector_html(self, mockserver: MockServer) -> None:
xpath = "response.xpath(\"//p[@class='one']/text()\").get()"
_, out, _ = proc("shell", mockserver.url("/html"), "-c", xpath)
assert out.strip() == "Works"
def test_response_encoding_gb18030(self, mockserver: MockServer) -> None:
_, out, _ = proc(
"shell", mockserver.url("/enc-gb18030"), "-c", "response.encoding"
)
assert out.strip() == "gb18030"
def test_redirect(self, mockserver: MockServer) -> None:
_, out, _ = proc("shell", mockserver.url("/redirect"), "-c", "response.url")
assert out.strip().endswith("/redirected")
def test_redirect_follow_302(self, mockserver: MockServer) -> None:
_, out, _ = proc(
"shell",
mockserver.url("/redirect-no-meta-refresh"),
"-c",
"response.status",
)
assert out.strip().endswith("200")
def test_redirect_not_follow_302(self, mockserver: MockServer) -> None:
_, out, _ = proc(
"shell",
"--no-redirect",
mockserver.url("/redirect-no-meta-refresh"),
"-c",
"response.status",
)
assert out.strip().endswith("302")
def test_fetch_redirect_follow_302(self, mockserver: MockServer) -> None:
"""Test that calling ``fetch(url)`` follows HTTP redirects by default."""
url = mockserver.url("/redirect-no-meta-refresh")
code = f"fetch('{url}')"
ret, out, err = proc("shell", "-c", code)
assert ret == 0, out
assert "Redirecting (302)" in err
assert "Crawled (200)" in err
def test_fetch_redirect_not_follow_302(self, mockserver: MockServer) -> None:
"""Test that calling ``fetch(url, redirect=False)`` disables automatic redirects."""
url = mockserver.url("/redirect-no-meta-refresh")
code = f"fetch('{url}', redirect=False)"
ret, out, err = proc("shell", "-c", code)
assert ret == 0, out
assert "Crawled (302)" in err
def test_request_replace(self, mockserver: MockServer) -> None:
url = mockserver.url("/text")
code = f"fetch('{url}') or fetch(response.request.replace(method='POST'))"
ret, out, _ = proc("shell", "-c", code)
assert ret == 0, out
def test_scrapy_import(self, mockserver: MockServer) -> None:
url = mockserver.url("/text")
code = f"fetch(scrapy.Request('{url}'))"
ret, out, _ = proc("shell", "-c", code)
assert ret == 0, out
def test_local_file(self) -> None:
filepath = Path(tests_datadir, "test_site", "index.html")
_, out, _ = proc("shell", str(filepath), "-c", "item")
assert "{}" in out
def test_local_nofile(self) -> None:
filepath = "file:///tests/sample_data/test_site/nothinghere.html"
ret, out, err = proc("shell", filepath, "-c", "item")
assert ret == 1, out or err
assert "No such file or directory" in err
def test_dns_failures(self, mockserver: MockServer) -> None:
if NON_EXISTING_RESOLVABLE:
pytest.skip("Non-existing hosts are resolvable")
url = "www.somedomainthatdoesntexi.st"
ret, out, err = proc("shell", url, "-c", "item")
assert ret == 1, out or err
assert "DNS lookup failed" in err
def test_shell_fetch_async(self, mockserver: MockServer) -> None:
url = mockserver.url("/html")
code = f"fetch('{url}')"
ret, _, err = proc(
"shell", "-c", code, "--set", f"TWISTED_REACTOR={_asyncio_reactor_path}"
)
assert ret == 0, err
assert "RuntimeError: There is no current event loop in thread" not in err
class TestInteractiveShell:
def test_fetch(self, mockserver: MockServer) -> None:
args = (
sys.executable,
"-m",
"scrapy.cmdline",
"shell",
)
env = os.environ.copy()
env["SCRAPY_PYTHON_SHELL"] = "python"
logfile = BytesIO()
# https://github.com/python/typeshed/issues/14915
p = PopenSpawn(args, env=cast("os._Environ", env), timeout=5)
p.logfile_read = logfile
p.expect_exact("Available Scrapy objects")
p.sendline(f"fetch('{mockserver.url('/')}')")
p.sendline("type(response)")
p.expect_exact("HtmlResponse")
p.sendeof()
p.wait()
logfile.seek(0)
assert "Traceback" not in logfile.read().decode()
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