add parallel computing interface regression test

tests/reg_tests/parallel_computing_interface_regression_test.py

@@ -0,0 +1,50 @@
+
+import copy
+
+import numpy as np
+
+from floris.tools import FlorisInterface, ParallelComputingInterface
+from tests.conftest import (
+    assert_results_arrays,
+)
+
+
+DEBUG = True
+VELOCITY_MODEL = "gauss"
+DEFLECTION_MODEL = "gauss"
+
+
+def test_parallel_turbine_powers(sample_inputs_fixture):
+    """
+    The calculate_no_wake function calculates the power production of a wind farm
+    assuming no wake losses. It does this by initializing and finalizing the
+    floris simulation while skipping the wake calculation. The power for all wind
+    turbines should be the same for a uniform wind condition. The chosen wake model
+    is not important since it will not actually be used. However, it is left enabled
+    instead of using "None" so that additional tests can be constructed here such
+    as one with yaw activated.
+    """
+    sample_inputs_fixture.floris["wake"]["model_strings"]["velocity_model"] = VELOCITY_MODEL
+    sample_inputs_fixture.floris["wake"]["model_strings"]["deflection_model"] = DEFLECTION_MODEL
+
+    fi_serial = FlorisInterface(sample_inputs_fixture.floris)
+    fi_parallel_input = copy.deepcopy(fi_serial)
+    fi_serial.calculate_wake()
+
+    serial_turbine_powers = fi_serial.get_turbine_powers()
+
+    fi_parallel = ParallelComputingInterface(
+        fi=fi_parallel_input,
+        max_workers=2,
+        n_wind_condition_splits=2,
+        interface="concurrent",
+        print_timings=False,
+    )
+
+    parallel_turbine_powers = fi_parallel.get_turbine_powers()
+
+    if DEBUG:
+        print(serial_turbine_powers)
+        print(parallel_turbine_powers)
+
+    assert_results_arrays(parallel_turbine_powers, serial_turbine_powers)