tests: Add test resetting the model
tests: Add test resetting the model

We first set a NULL model and then reset the old model, just to get the
effect of clearing and then resetting.

We reset the cursor and selection afterwards, so the reset doesn't
destroy all the work we did.

jessevdk/gtk,Lyude/gtk-,davidgumberg/gtk,ahodesuka/gtk,alexlarsson/gtk,Adamovskiy/gtk,jigpu/gtk,alexlarsson/gtk,Lyude/gtk-,davidgumberg/gtk,Lyude/gtk-,ahodesuka/gtk,davidgumberg/gtk,bratsche/gtk-,Lyude/gtk-,davidgumberg/gtk,grubersjoe/adwaita,grubersjoe/adwaita,Distrotech/gtk2,davidgumberg/gtk,Distrotech/gtk2,davidgumberg/gtk,alexlarsson/gtk,jessevdk/gtk,ahodesuka/gtk,ahodesuka/gtk,Lyude/gtk-,grubersjoe/adwaita,ebassi/gtk,alexlarsson/gtk,ahodesuka/gtk,ebassi/gtk,davidt/gtk,Sidnioulz/SandboxGtk,msteinert/gtk,bratsche/gtk-,Distrotech/gtk2,ebassi/gtk,jigpu/gtk,davidgumberg/gtk,chergert/gtk,chergert/gtk,ebassi/gtk,grubersjoe/adwaita,Sidnioulz/SandboxGtk,chergert/gtk,jessevdk/gtk,jigpu/gtk,ahodesuka/gtk,jadahl/gtk,alexlarsson/gtk,jigpu/gtk,ebassi/gtk,chergert/gtk,jadahl/gtk,chergert/gtk,Adamovskiy/gtk,jigpu/gtk,chergert/gtk,davidgumberg/gtk,jadahl/gtk,Adamovskiy/gtk,ahodesuka/gtk,Distrotech/gtk2,Adamovskiy/gtk,jigpu/gtk,Distrotech/gtk2,chergert/gtk,jadahl/gtk,jadahl/gtk,msteinert/gtk,bratsche/gtk-,msteinert/gtk,Adamovskiy/gtk,Sidnioulz/SandboxGtk,Lyude/gtk-,Adamovskiy/gtk,davidt/gtk,grubersjoe/adwaita,jigpu/gtk,msteinert/gtk,jessevdk/gtk,jessevdk/gtk,grubersjoe/adwaita,Sidnioulz/SandboxGtk,davidt/gtk,msteinert/gtk,alexlarsson/gtk,alexlarsson/gtk,jessevdk/gtk,davidt/gtk,msteinert/gtk,jigpu/gtk,Adamovskiy/gtk,jadahl/gtk,jadahl/gtk,davidt/gtk,grubersjoe/adwaita,grubersjoe/adwaita,ahodesuka/gtk,chergert/gtk,ebassi/gtk,bratsche/gtk-,Sidnioulz/SandboxGtk,Adamovskiy/gtk,bratsche/gtk-,Distrotech/gtk2,Lyude/gtk-,bratsche/gtk-,jessevdk/gtk,davidt/gtk,jadahl/gtk,alexlarsson/gtk,Sidnioulz/SandboxGtk,Lyude/gtk-