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import os
import sys
from io import BytesIO
from pathlib import Path
from pexpect.popen_spawn import PopenSpawn
from twisted.internet import defer
from twisted.trial import unittest
from tests import NON_EXISTING_RESOLVABLE, tests_datadir
from tests.mockserver import MockServer
from tests.utils.testproc import ProcessTest
from tests.utils.testsite import SiteTest
class TestShellCommand(ProcessTest, SiteTest, unittest.TestCase):
command = "shell"
@defer.inlineCallbacks
def test_empty(self):
_, out, _ = yield self.execute(["-c", "item"])
assert b"{}" in out
@defer.inlineCallbacks
def test_response_body(self):
_, out, _ = yield self.execute([self.url("/text"), "-c", "response.body"])
assert b"Works" in out
@defer.inlineCallbacks
def test_response_type_text(self):
_, out, _ = yield self.execute([self.url("/text"), "-c", "type(response)"])
assert b"TextResponse" in out
@defer.inlineCallbacks
def test_response_type_html(self):
_, out, _ = yield self.execute([self.url("/html"), "-c", "type(response)"])
assert b"HtmlResponse" in out
@defer.inlineCallbacks
def test_response_selector_html(self):
xpath = "response.xpath(\"//p[@class='one']/text()\").get()"
_, out, _ = yield self.execute([self.url("/html"), "-c", xpath])
assert out.strip() == b"Works"
@defer.inlineCallbacks
def test_response_encoding_gb18030(self):
_, out, _ = yield self.execute(
[self.url("/enc-gb18030"), "-c", "response.encoding"]
)
assert out.strip() == b"gb18030"
@defer.inlineCallbacks
def test_redirect(self):
_, out, _ = yield self.execute([self.url("/redirect"), "-c", "response.url"])
assert out.strip().endswith(b"/redirected")
@defer.inlineCallbacks
def test_redirect_follow_302(self):
_, out, _ = yield self.execute(
[self.url("/redirect-no-meta-refresh"), "-c", "response.status"]
)
assert out.strip().endswith(b"200")
@defer.inlineCallbacks
def test_redirect_not_follow_302(self):
_, out, _ = yield self.execute(
[
"--no-redirect",
self.url("/redirect-no-meta-refresh"),
"-c",
"response.status",
]
)
assert out.strip().endswith(b"302")
@defer.inlineCallbacks
def test_fetch_redirect_follow_302(self):
"""Test that calling ``fetch(url)`` follows HTTP redirects by default."""
url = self.url("/redirect-no-meta-refresh")
code = f"fetch('{url}')"
errcode, out, errout = yield self.execute(["-c", code])
assert errcode == 0, out
assert b"Redirecting (302)" in errout
assert b"Crawled (200)" in errout
@defer.inlineCallbacks
def test_fetch_redirect_not_follow_302(self):
"""Test that calling ``fetch(url, redirect=False)`` disables automatic redirects."""
url = self.url("/redirect-no-meta-refresh")
code = f"fetch('{url}', redirect=False)"
errcode, out, errout = yield self.execute(["-c", code])
assert errcode == 0, out
assert b"Crawled (302)" in errout
@defer.inlineCallbacks
def test_request_replace(self):
url = self.url("/text")
code = f"fetch('{url}') or fetch(response.request.replace(method='POST'))"
errcode, out, _ = yield self.execute(["-c", code])
assert errcode == 0, out
@defer.inlineCallbacks
def test_scrapy_import(self):
url = self.url("/text")
code = f"fetch(scrapy.Request('{url}'))"
errcode, out, _ = yield self.execute(["-c", code])
assert errcode == 0, out
@defer.inlineCallbacks
def test_local_file(self):
filepath = Path(tests_datadir, "test_site", "index.html")
_, out, _ = yield self.execute([str(filepath), "-c", "item"])
assert b"{}" in out
@defer.inlineCallbacks
def test_local_nofile(self):
filepath = "file:///tests/sample_data/test_site/nothinghere.html"
errcode, out, err = yield self.execute(
[filepath, "-c", "item"], check_code=False
)
assert errcode == 1, out or err
assert b"No such file or directory" in err
@defer.inlineCallbacks
def test_dns_failures(self):
if NON_EXISTING_RESOLVABLE:
raise unittest.SkipTest("Non-existing hosts are resolvable")
url = "www.somedomainthatdoesntexi.st"
errcode, out, err = yield self.execute([url, "-c", "item"], check_code=False)
assert errcode == 1, out or err
assert b"DNS lookup failed" in err
@defer.inlineCallbacks
def test_shell_fetch_async(self):
reactor_path = "twisted.internet.asyncioreactor.AsyncioSelectorReactor"
url = self.url("/html")
code = f"fetch('{url}')"
args = ["-c", code, "--set", f"TWISTED_REACTOR={reactor_path}"]
_, _, err = yield self.execute(args, check_code=True)
assert b"RuntimeError: There is no current event loop in thread" not in err
class TestInteractiveShell:
def test_fetch(self):
args = (
sys.executable,
"-m",
"scrapy.cmdline",
"shell",
)
env = os.environ.copy()
env["SCRAPY_PYTHON_SHELL"] = "python"
logfile = BytesIO()
p = PopenSpawn(args, env=env, timeout=5)
p.logfile_read = logfile
p.expect_exact("Available Scrapy objects")
with MockServer() as mockserver:
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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