Add Restart Test for ZUDL Character Limit

Uses the example model from PR OPM/opm-tests#1279 in which the
defining expression of one UDQ is exactly 128 characters long.  This
expression will overflow the character limit if we insert any new
characters like blanks or quotes.

restartTests.cmake

@@ -92,6 +92,19 @@ add_test_compare_restarted_simulation(CASENAME network_01_reroute_restart
                                       DIR network
                                       TEST_ARGS --enable-tuning=true --local-well-solve-control-switching=true)
 
+# Restart run in which a UDQ defining expression has exactly 128
+# characters.  Verifies that we don't overflow the ZUDL character
+# limit in restart files.
+add_test_compare_restarted_simulation(CASENAME udq_reg_02
+  FILENAME UDQ_REG-02
+  SIMULATOR flow
+  ABS_TOL ${abs_tol_restart}
+  REL_TOL ${rel_tol_restart}
+  RESTART_STEP 2
+  DIR udq_actionx
+  TEST_ARGS --enable-tuning=true
+)
+
 # The dynamic MSW data is not written to /read from the restart file
 # We therefore accept significant deviation in the results.
 # Note also that we use --sched-restart=true since some necessary