Add a test case for the case of 2 adjacent fibers

make sure that their loss is not concatenated

Signed-off-by: EstherLerouzic <esther.lerouzic@orange.com>
Change-Id: I63678dd5b72f7f6984101c4367320f3f981cb573

tests/data/bugfixiteratortopo.json

@@ -53,6 +53,48 @@
         }
       }
     },
+    {
+      "uid": "fiber7",
+      "type": "Fiber",
+      "type_variety": "SSMF",
+      "params": {
+        "length": 1.0,
+        "loss_coef": 0.2,
+        "length_units": "km",
+        "att_in": 0,
+        "con_in": 0.0,
+        "con_out": 0.0
+      },
+      "metadata": {
+        "location": {
+          "latitude": 0,
+          "longitude": 0,
+          "city": null,
+          "region": null
+        }
+      }
+    },
+    {
+      "uid": "fiber8",
+      "type": "Fiber",
+      "type_variety": "SSMF",
+      "params": {
+        "length": 60.0,
+        "loss_coef": 0.2,
+        "length_units": "km",
+        "att_in": 0,
+        "con_in": 0.0,
+        "con_out": 0.0
+      },
+      "metadata": {
+        "location": {
+          "latitude": 0,
+          "longitude": 0,
+          "city": null,
+          "region": null
+        }
+      }
+    },
     {
       "uid": "fused1",
       "type": "Fused",
@@ -387,6 +429,18 @@
     {
       "from_node": "nodeB",
       "to_node": "Site_B"
+    },
+    {
+      "from_node": "nodeA",
+      "to_node": "fiber7"
+    },
+    {
+      "from_node": "fiber7",
+      "to_node": "fiber8"
+    },
+    {
+      "from_node": "fiber8",
+      "to_node": "nodeB"
     }
   ]
 }

tests/test_network_functions.py

@@ -30,6 +30,9 @@ NETWORK_FILENAME = TEST_DIR / 'data/bugfixiteratortopo.json'
     # fourth span
     ['fiber6', 17],
     ['fused7', 17],
+    # fifth span
+    ['fiber7', 0.2],
+    ['fiber8', 12],
     # all other nodes
     ['Site_A', 0],
     ['nodeA', 0],