Issues when runnning tests with Xvfb

Hi,

I am trying to run some tests with pytest-qt using Travis and to simulate at my workstation the same issue I am using pytest-xvfb.

The following test works when running at my computer without the Xvfb but something very similar fails at Travis and also at my computer when using Xvfb.

from PyQt5.QtWidgets import QLineEdit

def test_focus(qtbot):
    line_edit = QLineEdit()
    qtbot.addWidget(line_edit)
    with qtbot.waitExposed(line_edit):
        line_edit.show()

    line_edit.setFocus()

    qtbot.waitUntil(lambda: line_edit.hasFocus())

    assert line_edit.hasFocus()

I tried to follow the same as the solution on this issue in here: https://github.com/pytest-dev/pytest-qt/issues/160 but no lucky so far.

[hhslepicka]

Thank you @nicoddemus and @The-Compiler for the input. It was really an issue of not having the window manager.

Here is what did the trick for me:

sudo: required

before_install:
  - sudo apt-get update
  - sudo apt-get install -y xvfb herbstluftwm
  -...

install:
  - "export DISPLAY=:99.0"
  - "/sbin/start-stop-daemon --start --quiet --pidfile /tmp/custom_xvfb_99.pid --make-pidfile --background --exec /usr/bin/Xvfb -- :99 -screen 0 1920x1200x24 -ac +extension GLX +render -noreset"
  - sleep 3

before_script:
  - "herbstluftwm &"
  - sleep 1

Now all my tests are passing and working as expected. Thank you for this great tool! 👍

[hhslepicka]

Sure! I’m just not sure if I added it to the best place but here it is: https://github.com/pytest-dev/pytest-qt/pull/207 👍