Use fake_statusbar for test_elided_text

See #1313

tests/unit/mainwindow/statusbar/test_textbase.py

@@ -31,7 +31,7 @@ from qutebrowser.mainwindow.statusbar.textbase import TextBase
     (Qt.ElideMiddle, lambda s: '…' in s),
     (Qt.ElideNone, lambda s: '…' not in s),
 ])
-def test_elided_text(qtbot, elidemode, check):
+def test_elided_text(fake_statusbar, qtbot, elidemode, check):
     """Ensure that a widget too small to hold the entire label text will elide.
 
     It is difficult to check what is actually being drawn in a portable way, so
@@ -46,11 +46,11 @@ def test_elided_text(qtbot, elidemode, check):
     """
     label = TextBase(elidemode=elidemode)
     qtbot.add_widget(label)
+    fake_statusbar.hbox.addWidget(label)
+
     long_string = 'Hello world! ' * 100
     label.setText(long_string)
-    label.resize(100, 50)
-    label.show()
-    qtbot.waitForWindowShown(label)
+
     assert check(label._elided_text)