Add discrete plane wave reframe test

reframe_tests/tests/src/source_tests/discrete_plane_wave_fs.in

@@ -0,0 +1,8 @@
+#title: Discrete plane wave in free-space
+#domain: 0.100 0.100 0.100
+#dx_dy_dz: 0.001 0.001 0.001
+#time_window: 3e-9
+
+#waveform: gaussiandot 1 1e9 myWave
+#discrete_plane_wave: 0.010 0.010 0.010 0.040 0.040 0.040 90.0 63.4 36.7 myWave
+#rx: 0.070 0.070 0.070

reframe_tests/tests/test_sources.py

@@ -22,6 +22,13 @@ class TestMagneticDipoleSource(GprMaxRegressionTest):
     model = parameter(["magnetic_dipole_fs"])
 
 
+@rfm.simple_test
+class TestDiscretePlaneWaveSource(GprMaxRegressionTest):
+    tags = {"test", "serial", "discrete_plane_wave", "waveform"}
+    sourcesdir = "src/source_tests"
+    model = parameter(["discrete_plane_wave_fs"])
+
+
 @rfm.simple_test
 class TestTransmissionLineSource(GprMaxRegressionTest):
     tags = {"test", "serial", "transmission_line", "waveform"}