def test_log_file_shows_warm_start_failure(self):
log_file_text = """
Warning: No solution found from 1 MIP starts.
"""
with open(self.solver._log_file, "w") as f:
f.write(log_file_text)
results = CPLEXSHELL.process_logfile(self.solver)
self.assertEqual(results.solver.mip_start_failed, True)
def test_log_file_shows_n_solutions_found_when_single(self):
log_file_text = """
Solution pool: 1 solution saved.
"""
with open(self.solver._log_file, "w") as f:
f.write(log_file_text)
results = CPLEXSHELL.process_logfile(self.solver)
self.assertEqual(results.solver.n_solutions_found, 1)
def test_log_file_shows_number_of_binary_variables_when_integer_variables_are_present(
self):
log_file_text = """
Variables : 7 [Nneg: 1, Binary: 4, General Integer: 2]
"""
with open(self.solver._log_file, "w") as f:
f.write(log_file_text)
results = CPLEXSHELL.process_logfile(self.solver)
self.assertEqual(results.problem.number_of_binary_variables, 4)
def test_log_file_shows_warm_start_objective_value(self):
log_file_text = """
1 of 1 MIP starts provided solutions.
MIP start 'm1' defined initial solution with objective 25210.5363.
"""
with open(self.solver._log_file, "w") as f:
f.write(log_file_text)
results = CPLEXSHELL.process_logfile(self.solver)
self.assertEqual(results.solver.warm_start_objective_value, 25210.5363)
def test_log_file_shows_number_of_continuous_variables(self):
log_file_text = """
Objective sense : Minimize
Variables : 506 [Nneg: 206, Binary: 300]
Objective nonzeros : 32
"""
with open(self.solver._log_file, "w") as f:
f.write(log_file_text)
results = CPLEXSHELL.process_logfile(self.solver)
self.assertEqual(results.problem.number_of_continuous_variables, 206)
def test_log_file_shows_tree_processing_time_when_sequential(self):
log_file_text = """
Presolve time = 0.14 sec. (181.11 ticks)
Root node processing (before b&c):
Real time = 123.45 sec. (211.39 ticks)
Sequential b&c:
Real time = 67.89 sec. (56.98 ticks)
Sync time (average) = 0.00 sec.
Wait time (average) = 0.00 sec.
------------
Total (root+branch&cut) = 191.34 sec. (268.37 ticks)
"""
with open(self.solver._log_file, "w") as f:
f.write(log_file_text)
results = CPLEXSHELL.process_logfile(self.solver)
self.assertEqual(results.solver.tree_processing_time, 67.89)
def test_log_file_shows_max_deterministic_time_limit_exceeded_with_feasible_solution(
self):
log_file_text = """
MIP - Deterministic time limit exceeded, integer feasible: Objective = 0.0000000000e+00
Current MIP best bound = 0.0000000000e+00 (gap = 10.0, 10.00%)
Solution time = 10.00 sec. Iterations = 10000 Nodes = 1000 (1)
Deterministic time = 100.00 ticks (10.00 ticks/sec)
CPLEX> Incumbent solution written to file '/var/folders/_x/xxxx/T/tmpxxx.cplex.sol'.
CPLEX>"""
with open(self.solver._log_file, "w") as f:
f.write(log_file_text)
results = CPLEXSHELL.process_logfile(self.solver)
self.assertEqual(results.solver.status, SolverStatus.ok)
self.assertEqual(results.solver.termination_condition,
TerminationCondition.maxTimeLimit)
self.assertEqual(results.solver.deterministic_time, 100.00)
def test_log_file_shows_infeasible(self):
log_file_text = """
MIP - Integer infeasible.
Current MIP best bound = 0.0000000000e+00 (gap is infinite)
Solution time = 0.00 sec. Iterations = 0 Nodes = 0
Deterministic time = 0.00 ticks (0.20 ticks/sec)
CPLEX> CPLEX Error 1217: No solution exists.
No file written.
CPLEX>"""
with open(self.solver._log_file, "w") as f:
f.write(log_file_text)
results = CPLEXSHELL.process_logfile(self.solver)
self.assertEqual(results.solver.status, SolverStatus.warning)
self.assertEqual(results.solver.termination_condition,
TerminationCondition.infeasible)
self.assertEqual(results.solver.termination_message,
"MIP - Integer infeasible.")
self.assertEqual(results.solver.return_code, 1217)
def test_log_file_shows_presolve_infeasible(self):
log_file_text = """
Infeasibility row 'c_e_x18_': 0 = -1.
Presolve time = 0.00 sec. (0.00 ticks)
Presolve - Infeasible.
Solution time = 0.00 sec.
Deterministic time = 0.00 ticks (0.61 ticks/sec)
CPLEX> CPLEX Error 1217: No solution exists.
No file written.
CPLEX>"""
with open(self.solver._log_file, "w") as f:
f.write(log_file_text)
results = CPLEXSHELL.process_logfile(self.solver)
self.assertEqual(results.solver.status, SolverStatus.warning)
self.assertEqual(results.solver.termination_condition,
TerminationCondition.infeasible)
self.assertEqual(results.solver.termination_message,
"Presolve - Infeasible.")
self.assertEqual(results.solver.return_code, 1217)