added a test for nonuniform solver

Author: cheginit

test.py

@@ -47,6 +47,8 @@ def do_tests(build, out_file, do_standalone=True, do_main=True,
         tests.append(PyroTest("advection_rk", "smooth", "inputs.smooth", opts))
         tests.append(PyroTest("advection_fv4",
                               "smooth", "inputs.smooth", opts))
+        tests.append(PyroTest("advection_nonuniform",
+                              "slotted", "inputs.slotted", opts))
         tests.append(PyroTest("compressible", "quad", "inputs.quad", opts))
         tests.append(PyroTest("compressible", "sod", "inputs.sod.x", opts))
         tests.append(PyroTest("compressible", "rt", "inputs.rt", opts))