#2793 update test

Author: rtimms

CHANGELOG.md

@@ -10,6 +10,7 @@
 
 ## Bug fixes
 
+- Fixed a bug where variable bounds could not contain `InputParameters` ([#2795](https://github.com/pybamm-team/PyBaMM/pull/2795))
 - Improved `model.latexify()` to have a cleaner and more readable output ([#2764](https://github.com/pybamm-team/PyBaMM/pull/2764))
 - Fixed electrolyte conservation in the case of concentration-dependent transference number ([#2758](https://github.com/pybamm-team/PyBaMM/pull/2758))
 - Fixed `plot_voltage_components` so that the sum of overpotentials is now equal to the voltage ([#2740](https://github.com/pybamm-team/PyBaMM/pull/2740))

tests/unit/test_discretisations/test_discretisation.py

@@ -144,9 +144,10 @@ def test_discretise_slicing(self):
 
         # bounds with an InputParameter
         a = pybamm.InputParameter("a")
-        v = pybamm.Variable("v", domain=whole_cell, bounds=(0, a))
+        b = pybamm.InputParameter("b")
+        v = pybamm.Variable("v", domain=whole_cell, bounds=(a, b))
         disc.set_variable_slices([v])
-        np.testing.assert_array_equal(disc.bounds[0], [0] * 100)
+        np.testing.assert_array_equal(disc.bounds[0], [-np.inf] * 100)
         np.testing.assert_array_equal(disc.bounds[1], [np.inf] * 100)
 
     def test_process_symbol_base(self):