Add test

Tests/short_tests.json

@@ -1125,5 +1125,15 @@
 	    "$src_dir/Convert_Matlab/inst_eddies_HDF5.py",
 	    "$src_dir/Tests/Input/Eurec4A_OA/adt_2019-12-15.mat"
 	]
+    },
+    {
+	"title": "Plot_eddy_contours_Mat",
+	"description":
+	"plot_eddy_contours.py on a file coming from the Matlab program.",
+	"command":
+	[
+	    "$src_dir/Analysis/plot_eddy_contours.py",
+	    "$tests_old_dir/Mat_v6_to_shapefiles/Snapshot_cyclo", "--save=png"
+	]
     }
 ]