add version check for highs in tests

Author: ZedongPeng

pyomo/contrib/mindtpy/tests/test_mindtpy.py

@@ -56,7 +56,12 @@
 QCP_model._generate_model()
 extreme_model_list = [LP_model.model, QCP_model.model]
 
-required_solvers = ('ipopt', 'appsi_highs')
+if SolverFactory('appsi_highs').available(exception_flag=False) and SolverFactory(
+    'appsi_highs'
+).version() >= (1, 7, 0):
+    required_solvers = ('ipopt', 'appsi_highs')
+else:
+    required_solvers = ('ipopt', 'glpk')
 if all(SolverFactory(s).available(exception_flag=False) for s in required_solvers):
     subsolvers_available = True
 else:

pyomo/contrib/mindtpy/tests/test_mindtpy_ECP.py

@@ -23,7 +23,13 @@
 from pyomo.environ import SolverFactory, value
 from pyomo.opt import TerminationCondition
 
-required_solvers = ('ipopt', 'appsi_highs')
+if SolverFactory('appsi_highs').available(exception_flag=False) and SolverFactory(
+    'appsi_highs'
+).version() >= (1, 7, 0):
+    required_solvers = ('ipopt', 'appsi_highs')
+else:
+    required_solvers = ('ipopt', 'glpk')
+
 if all(SolverFactory(s).available(exception_flag=False) for s in required_solvers):
     subsolvers_available = True
 else:

pyomo/contrib/mindtpy/tests/test_mindtpy_feas_pump.py

@@ -28,7 +28,13 @@
 from pyomo.contrib.mindtpy.tests.feasibility_pump1 import FeasPump1
 from pyomo.contrib.mindtpy.tests.feasibility_pump2 import FeasPump2
 
-required_solvers = ('ipopt', 'appsi_highs')
+if SolverFactory('appsi_highs').available(exception_flag=False) and SolverFactory(
+    'appsi_highs'
+).version() >= (1, 7, 0):
+    required_solvers = ('ipopt', 'appsi_highs')
+else:
+    required_solvers = ('ipopt', 'glpk')
+
 if all(SolverFactory(s).available(exception_flag=False) for s in required_solvers):
     subsolvers_available = True
 else:

pyomo/contrib/mindtpy/tests/test_mindtpy_grey_box.py

@@ -18,7 +18,14 @@
 from pyomo.contrib.mindtpy.tests.MINLP_simple import SimpleMINLP as SimpleMINLP
 
 model_list = [SimpleMINLP(grey_box=True)]
-required_solvers = ('cyipopt', 'glpk')
+
+if SolverFactory('appsi_highs').available(exception_flag=False) and SolverFactory(
+    'appsi_highs'
+).version() >= (1, 7, 0):
+    required_solvers = ('cyipopt', 'appsi_highs')
+else:
+    required_solvers = ('cyipopt', 'glpk')
+
 if all(SolverFactory(s).available(exception_flag=False) for s in required_solvers):
     subsolvers_available = True
 else: