Unlock 30% off on Manual Testing Annual Plans this Holiday Season.

Copied to Clipboard!

How to use lsof_check method in Pytest

Best Python code snippet using pytest

test_capture.py

Source:test_capture.py

...93    tmpfile = SomeFileWrapper()94    assert py.io.dupfile(tmpfile) is tmpfile95    with py.test.raises(AttributeError):96        py.io.dupfile(tmpfile, raising=True)97def lsof_check(func):98    pid = os.getpid()99    try:100        out = py.process.cmdexec("lsof -p %d" % pid)101    except py.process.cmdexec.Error:102        py.test.skip("could not run 'lsof'")103    func()104    out2 = py.process.cmdexec("lsof -p %d" % pid)105    len1 = len([x for x in out.split("\n") if "REG" in x])106    len2 = len([x for x in out2.split("\n") if "REG" in x])107    assert len2 < len1 + 3, out2108class TestFDCapture:109    pytestmark = needsdup110    def test_not_now(self, tmpfile):111        fd = tmpfile.fileno()112        cap = py.io.FDCapture(fd, now=False)113        data = tobytes("hello")114        os.write(fd, data)115        f = cap.done()116        s = f.read()117        assert not s118        cap = py.io.FDCapture(fd, now=False)119        cap.start()120        os.write(fd, data)121        f = cap.done()122        s = f.read()123        assert s == "hello"124    def test_simple(self, tmpfile):125        fd = tmpfile.fileno()126        cap = py.io.FDCapture(fd)127        data = tobytes("hello")128        os.write(fd, data)129        f = cap.done()130        s = f.read()131        assert s == "hello"132        f.close()133    def test_simple_many(self, tmpfile):134        for i in range(10):135            self.test_simple(tmpfile)136    def test_simple_many_check_open_files(self, tmpfile):137        lsof_check(lambda: self.test_simple_many(tmpfile))138    def test_simple_fail_second_start(self, tmpfile):139        fd = tmpfile.fileno()140        cap = py.io.FDCapture(fd)141        f = cap.done()142        py.test.raises(ValueError, cap.start)143        f.close()144    def test_stderr(self):145        cap = py.io.FDCapture(2, patchsys=True)146        print_("hello", file=sys.stderr)147        f = cap.done()148        s = f.read()149        assert s == "hello\n"150    def test_stdin(self, tmpfile):151        tmpfile.write(tobytes("3"))152        tmpfile.seek(0)153        cap = py.io.FDCapture(0, tmpfile=tmpfile)154        # check with os.read() directly instead of raw_input(), because155        # sys.stdin itself may be redirected (as py.test now does by default)156        x = os.read(0, 100).strip()157        f = cap.done()158        assert x == tobytes("3")159    def test_writeorg(self, tmpfile):160        data1, data2 = tobytes("foo"), tobytes("bar")161        try:162            cap = py.io.FDCapture(tmpfile.fileno())163            tmpfile.write(data1)164            cap.writeorg(data2)165        finally:166            tmpfile.close()167        f = cap.done()168        scap = f.read()169        assert scap == totext(data1)170        stmp = open(tmpfile.name, 'rb').read()171        assert stmp == data2172class TestStdCapture:173    def getcapture(self, **kw):174        return py.io.StdCapture(**kw)175    def test_capturing_done_simple(self):176        cap = self.getcapture()177        sys.stdout.write("hello")178        sys.stderr.write("world")179        outfile, errfile = cap.done()180        s = outfile.read()181        assert s == "hello"182        s = errfile.read()183        assert s == "world"184    def test_capturing_reset_simple(self):185        cap = self.getcapture()186        print("hello world")187        sys.stderr.write("hello error\n")188        out, err = cap.reset()189        assert out == "hello world\n"190        assert err == "hello error\n"191    def test_capturing_readouterr(self):192        cap = self.getcapture()193        try:194            print ("hello world")195            sys.stderr.write("hello error\n")196            out, err = cap.readouterr()197            assert out == "hello world\n"198            assert err == "hello error\n"199            sys.stderr.write("error2")200        finally:201            out, err = cap.reset()202        assert err == "error2"203    def test_capturing_readouterr_unicode(self):204        cap = self.getcapture()205        print ("hx\xc4\x85\xc4\x87")206        out, err = cap.readouterr()207        assert out == py.builtin._totext("hx\xc4\x85\xc4\x87\n", "utf8")208    @py.test.mark.skipif('sys.version_info >= (3,)',209                      reason='text output different for bytes on python3')210    def test_capturing_readouterr_decode_error_handling(self):211        cap = self.getcapture()212        # triggered a internal error in pytest213        print('\xa6')214        out, err = cap.readouterr()215        assert out == py.builtin._totext('\ufffd\n', 'unicode-escape')216    def test_capturing_mixed(self):217        cap = self.getcapture(mixed=True)218        sys.stdout.write("hello ")219        sys.stderr.write("world")220        sys.stdout.write(".")221        out, err = cap.reset()222        assert out.strip() == "hello world."223        assert not err224    def test_reset_twice_error(self):225        cap = self.getcapture()226        print ("hello")227        out, err = cap.reset()228        py.test.raises(ValueError, cap.reset)229        assert out == "hello\n"230        assert not err231    def test_capturing_modify_sysouterr_in_between(self):232        oldout = sys.stdout233        olderr = sys.stderr234        cap = self.getcapture()235        sys.stdout.write("hello")236        sys.stderr.write("world")237        sys.stdout = py.io.TextIO()238        sys.stderr = py.io.TextIO()239        print ("not seen")240        sys.stderr.write("not seen\n")241        out, err = cap.reset()242        assert out == "hello"243        assert err == "world"244        assert sys.stdout == oldout245        assert sys.stderr == olderr246    def test_capturing_error_recursive(self):247        cap1 = self.getcapture()248        print ("cap1")249        cap2 = self.getcapture()250        print ("cap2")251        out2, err2 = cap2.reset()252        out1, err1 = cap1.reset()253        assert out1 == "cap1\n"254        assert out2 == "cap2\n"255    def test_just_out_capture(self):256        cap = self.getcapture(out=True, err=False)257        sys.stdout.write("hello")258        sys.stderr.write("world")259        out, err = cap.reset()260        assert out == "hello"261        assert not err262    def test_just_err_capture(self):263        cap = self.getcapture(out=False, err=True)264        sys.stdout.write("hello")265        sys.stderr.write("world")266        out, err = cap.reset()267        assert err == "world"268        assert not out269    def test_stdin_restored(self):270        old = sys.stdin271        cap = self.getcapture(in_=True)272        newstdin = sys.stdin273        out, err = cap.reset()274        assert newstdin != sys.stdin275        assert sys.stdin is old276    def test_stdin_nulled_by_default(self):277        print ("XXX this test may well hang instead of crashing")278        print ("XXX which indicates an error in the underlying capturing")279        print ("XXX mechanisms")280        cap = self.getcapture()281        py.test.raises(IOError, "sys.stdin.read()")282        out, err = cap.reset()283    def test_suspend_resume(self):284        cap = self.getcapture(out=True, err=False, in_=False)285        try:286            print ("hello")287            sys.stderr.write("error\n")288            out, err = cap.suspend()289            assert out == "hello\n"290            assert not err291            print ("in between")292            sys.stderr.write("in between\n")293            cap.resume()294            print ("after")295            sys.stderr.write("error_after\n")296        finally:297            out, err = cap.reset()298        assert out == "after\n"299        assert not err300class TestStdCaptureNotNow(TestStdCapture):301    def getcapture(self, **kw):302        kw['now'] = False303        cap = py.io.StdCapture(**kw)304        cap.startall()305        return cap306class TestStdCaptureFD(TestStdCapture):307    pytestmark = needsdup308    def getcapture(self, **kw):309        return py.io.StdCaptureFD(**kw)310    def test_intermingling(self):311        cap = self.getcapture()312        oswritebytes(1, "1")313        sys.stdout.write(str(2))314        sys.stdout.flush()315        oswritebytes(1, "3")316        oswritebytes(2, "a")317        sys.stderr.write("b")318        sys.stderr.flush()319        oswritebytes(2, "c")320        out, err = cap.reset()321        assert out == "123"322        assert err == "abc"323    def test_callcapture(self):324        def func(x, y):325            print (x)326            py.std.sys.stderr.write(str(y))327            return 42328        res, out, err = py.io.StdCaptureFD.call(func, 3, y=4)329        assert res == 42330        assert out.startswith("3")331        assert err.startswith("4")332    def test_many(self, capfd):333        def f():334            for i in range(10):335                cap = py.io.StdCaptureFD()336                cap.reset()337        lsof_check(f)338class TestStdCaptureFDNotNow(TestStdCaptureFD):339    pytestmark = needsdup340    def getcapture(self, **kw):341        kw['now'] = False342        cap = py.io.StdCaptureFD(**kw)343        cap.startall()344        return cap345@needsdup346def test_stdcapture_fd_tmpfile(tmpfile):347    capfd = py.io.StdCaptureFD(out=tmpfile)348    os.write(1, "hello".encode("ascii"))349    os.write(2, "world".encode("ascii"))350    outf, errf = capfd.done()351    assert outf == tmpfile...

Pytest Tutorial

Looking for an in-depth tutorial around pytest? LambdaTest covers the detailed pytest tutorial that has everything related to the pytest, from setting up the pytest framework to automation testing. Delve deeper into pytest testing by exploring advanced use cases like parallel testing, pytest fixtures, parameterization, executing multiple test cases from a single file, and more.

Chapters

What is pytest
Pytest installation: Want to start pytest from scratch? See how to install and configure pytest for Python automation testing.
Run first test with pytest framework: Follow this step-by-step tutorial to write and run your first pytest script.
Parallel testing with pytest: A hands-on guide to parallel testing with pytest to improve the scalability of your test automation.
Generate pytest reports: Reports make it easier to understand the results of pytest-based test runs. Learn how to generate pytest reports.
Pytest Parameterized tests: Create and run your pytest scripts while avoiding code duplication and increasing test coverage with parameterization.
Pytest Fixtures: Check out how to implement pytest fixtures for your end-to-end testing needs.
Execute Multiple Test Cases: Explore different scenarios for running multiple test cases in pytest from a single file.
Stop Test Suite after N Test Failures: See how to stop your test suite after n test failures in pytest using the @pytest.mark.incremental decorator and maxfail command-line option.