Do not use option `--node`

Do not use option `--node` in test of `plot_components.py`, since we
are going to remove it.

Overlap/Analysis/tests.json

@@ -30,15 +30,21 @@
 	]
     },
     "Plot_components_date": {
-	"description": "plot_components.py with option node and option label with an integer value, so is_node_type is called with an integer value for label.",
-	"command": [
-            "$src_dir/Overlap/Analysis/plot_components.py",
-            "$tests_old_dir/EGr2nd15md4np3/edgelist.csv",
-            "$tests_old_dir/Extraction_eddies_region_2_noise/SHPC",
-            "Anticyclones",
-            "--save=png",
-            "--node=204618",
-            "--label_date=20461"
+	"description": "plot_components.py with option label with an integer value, so is_node_type is called with an integer value for label.",
+	"commands":
+	[
+	    [
+		"ln", "-sf", "$tests_old_dir/EGr2nd15md4np3/e_overestim.txt",
+		"$tests_old_dir/Extract_component_nx_2"
+	    ],
+	    [
+		"$src_dir/Overlap/Analysis/plot_components.py",
+		"$tests_old_dir/Extract_component_nx_2/component.csv",
+		"$tests_old_dir/Extraction_eddies_region_2_noise/SHPC",
+		"Anticyclones",
+		"--save=png",
+		"--label_date=20461"
+	    ]
 	]
     },
     "Extract_component":
@@ -74,5 +80,14 @@
 	["$src_dir/Overlap/Analysis/extract_component_nx.py",
 	 "$tests_old_dir/EGr2nd15md4np3_cyclo/edgelist.csv", "286461",
 	 "component.csv"]
+    },
+    "Extract_component_nx_2":
+    {
+	"description": "Serves as input to test Plot_components_date.",
+	"command":
+	["$src_dir/Overlap/Analysis/extract_component_nx.py",
+	 "$tests_old_dir/EGr2nd15md4np3/edgelist.csv", "204618",
+	 "component.csv"],
+	"exclude_cmp": ["e_overestim.txt"]
     }
 }