diff --git a/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_with_altered_initial_data/expected.json b/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_with_altered_initial_data/expected.json
new file mode 100644
index 0000000..4ab1a31
--- /dev/null
+++ b/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_with_altered_initial_data/expected.json
@@ -0,0 +1,732 @@
+{
+  "czechlight-roadm-device:channel-plan": {
+    "channel": [
+      {
+        "name": "C-band",
+        "lower-frequency": "191325000",
+        "upper-frequency": "196125000"
+      },
+      {
+        "name": "13.5",
+        "lower-frequency": "191325000",
+        "upper-frequency": "191375000"
+      },
+      {
+        "name": "14.0",
+        "lower-frequency": "191375000",
+        "upper-frequency": "191425000"
+      },
+      {
+        "name": "14.5",
+        "lower-frequency": "191425000",
+        "upper-frequency": "191475000"
+      },
+      {
+        "name": "15.0",
+        "lower-frequency": "191475000",
+        "upper-frequency": "191525000"
+      },
+      {
+        "name": "15.5",
+        "lower-frequency": "191525000",
+        "upper-frequency": "191575000"
+      },
+      {
+        "name": "16.0",
+        "lower-frequency": "191575000",
+        "upper-frequency": "191625000"
+      },
+      {
+        "name": "16.5",
+        "lower-frequency": "191625000",
+        "upper-frequency": "191675000"
+      },
+      {
+        "name": "17.0",
+        "lower-frequency": "191675000",
+        "upper-frequency": "191725000"
+      },
+      {
+        "name": "17.5",
+        "lower-frequency": "191725000",
+        "upper-frequency": "191775000"
+      },
+      {
+        "name": "18.0",
+        "lower-frequency": "191775000",
+        "upper-frequency": "191825000"
+      },
+      {
+        "name": "18.5",
+        "lower-frequency": "191825000",
+        "upper-frequency": "191875000"
+      },
+      {
+        "name": "19.0",
+        "lower-frequency": "191875000",
+        "upper-frequency": "191925000"
+      },
+      {
+        "name": "19.5",
+        "lower-frequency": "191925000",
+        "upper-frequency": "191975000"
+      },
+      {
+        "name": "20.0",
+        "lower-frequency": "191975000",
+        "upper-frequency": "192025000"
+      },
+      {
+        "name": "20.5",
+        "lower-frequency": "192025000",
+        "upper-frequency": "192075000"
+      },
+      {
+        "name": "21.0",
+        "lower-frequency": "192075000",
+        "upper-frequency": "192125000"
+      },
+      {
+        "name": "21.5",
+        "lower-frequency": "192125000",
+        "upper-frequency": "192175000"
+      },
+      {
+        "name": "22.0",
+        "lower-frequency": "192175000",
+        "upper-frequency": "192225000"
+      },
+      {
+        "name": "22.5",
+        "lower-frequency": "192225000",
+        "upper-frequency": "192275000"
+      },
+      {
+        "name": "23.0",
+        "lower-frequency": "192275000",
+        "upper-frequency": "192325000"
+      },
+      {
+        "name": "23.5",
+        "lower-frequency": "192325000",
+        "upper-frequency": "192375000"
+      },
+      {
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+        "lower-frequency": "192375000",
+        "upper-frequency": "192425000"
+      },
+      {
+        "name": "24.5",
+        "lower-frequency": "192425000",
+        "upper-frequency": "192475000"
+      },
+      {
+        "name": "25.0",
+        "lower-frequency": "192475000",
+        "upper-frequency": "192525000"
+      },
+      {
+        "name": "25.5",
+        "lower-frequency": "192525000",
+        "upper-frequency": "192575000"
+      },
+      {
+        "name": "26.0",
+        "lower-frequency": "192575000",
+        "upper-frequency": "192625000"
+      },
+      {
+        "name": "26.5",
+        "lower-frequency": "192625000",
+        "upper-frequency": "192675000"
+      },
+      {
+        "name": "27.0",
+        "lower-frequency": "192675000",
+        "upper-frequency": "192725000"
+      },
+      {
+        "name": "27.5",
+        "lower-frequency": "192725000",
+        "upper-frequency": "192775000"
+      },
+      {
+        "name": "28.0",
+        "lower-frequency": "192775000",
+        "upper-frequency": "192825000"
+      },
+      {
+        "name": "28.5",
+        "lower-frequency": "192825000",
+        "upper-frequency": "192875000"
+      },
+      {
+        "name": "29.0",
+        "lower-frequency": "192875000",
+        "upper-frequency": "192925000"
+      },
+      {
+        "name": "29.5",
+        "lower-frequency": "192925000",
+        "upper-frequency": "192975000"
+      },
+      {
+        "name": "30.0",
+        "lower-frequency": "192975000",
+        "upper-frequency": "193025000"
+      },
+      {
+        "name": "30.5",
+        "lower-frequency": "193025000",
+        "upper-frequency": "193075000"
+      },
+      {
+        "name": "31.0",
+        "lower-frequency": "193075000",
+        "upper-frequency": "193125000"
+      },
+      {
+        "name": "31.5",
+        "lower-frequency": "193125000",
+        "upper-frequency": "193175000"
+      },
+      {
+        "name": "32.0",
+        "lower-frequency": "193175000",
+        "upper-frequency": "193225000"
+      },
+      {
+        "name": "32.5",
+        "lower-frequency": "193225000",
+        "upper-frequency": "193275000"
+      },
+      {
+        "name": "33.0",
+        "lower-frequency": "193275000",
+        "upper-frequency": "193325000"
+      },
+      {
+        "name": "33.5",
+        "lower-frequency": "193325000",
+        "upper-frequency": "193375000"
+      },
+      {
+        "name": "34.0",
+        "lower-frequency": "193375000",
+        "upper-frequency": "193425000"
+      },
+      {
+        "name": "34.5",
+        "lower-frequency": "193425000",
+        "upper-frequency": "193475000"
+      },
+      {
+        "name": "35.0",
+        "lower-frequency": "193475000",
+        "upper-frequency": "193525000"
+      },
+      {
+        "name": "35.5",
+        "lower-frequency": "193525000",
+        "upper-frequency": "193575000"
+      },
+      {
+        "name": "36.0",
+        "lower-frequency": "193575000",
+        "upper-frequency": "193625000"
+      },
+      {
+        "name": "36.5",
+        "lower-frequency": "193625000",
+        "upper-frequency": "193675000"
+      },
+      {
+        "name": "37.0",
+        "lower-frequency": "193675000",
+        "upper-frequency": "193725000"
+      },
+      {
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+        "lower-frequency": "193725000",
+        "upper-frequency": "193775000"
+      },
+      {
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+        "lower-frequency": "193775000",
+        "upper-frequency": "193825000"
+      },
+      {
+        "name": "38.5",
+        "lower-frequency": "193825000",
+        "upper-frequency": "193875000"
+      },
+      {
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+        "lower-frequency": "193875000",
+        "upper-frequency": "193925000"
+      },
+      {
+        "name": "39.5",
+        "lower-frequency": "193925000",
+        "upper-frequency": "193975000"
+      },
+      {
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+        "lower-frequency": "193975000",
+        "upper-frequency": "194025000"
+      },
+      {
+        "name": "40.5",
+        "lower-frequency": "194025000",
+        "upper-frequency": "194075000"
+      },
+      {
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+        "lower-frequency": "194075000",
+        "upper-frequency": "194125000"
+      },
+      {
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+        "lower-frequency": "194125000",
+        "upper-frequency": "194175000"
+      },
+      {
+        "name": "42.0",
+        "lower-frequency": "194175000",
+        "upper-frequency": "194225000"
+      },
+      {
+        "name": "42.5",
+        "lower-frequency": "194225000",
+        "upper-frequency": "194275000"
+      },
+      {
+        "name": "43.0",
+        "lower-frequency": "194275000",
+        "upper-frequency": "194325000"
+      },
+      {
+        "name": "43.5",
+        "lower-frequency": "194325000",
+        "upper-frequency": "194375000"
+      },
+      {
+        "name": "44.0",
+        "lower-frequency": "194375000",
+        "upper-frequency": "194425000"
+      },
+      {
+        "name": "44.5",
+        "lower-frequency": "194425000",
+        "upper-frequency": "194475000"
+      },
+      {
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+        "lower-frequency": "194475000",
+        "upper-frequency": "194525000"
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+      {
+        "name": "45.5",
+        "lower-frequency": "194525000",
+        "upper-frequency": "194575000"
+      },
+      {
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+      {
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+      },
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+      {
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+        "lower-frequency": "195875000",
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+        "lower-frequency": "195925000",
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+      {
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+        "lower-frequency": "191450000",
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+      },
+      {
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+      },
+      {
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+      },
+      {
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+        "lower-frequency": "192150000",
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+      },
+      {
+        "name": "23 (100GHz)",
+        "lower-frequency": "192250000",
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+      {
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+      },
+      {
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+      {
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+      },
+      {
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+      {
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+      },
+      {
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+        "lower-frequency": "192950000",
+        "upper-frequency": "193050000"
+      },
+      {
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+        "lower-frequency": "193050000",
+        "upper-frequency": "193150000"
+      },
+      {
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+        "lower-frequency": "193150000",
+        "upper-frequency": "193250000"
+      },
+      {
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+      {
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+      },
+      {
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+      {
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+      },
+      {
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+        "lower-frequency": "193650000",
+        "upper-frequency": "193750000"
+      },
+      {
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+        "lower-frequency": "193750000",
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+      {
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+        "lower-frequency": "193850000",
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+      },
+      {
+        "name": "40 (100GHz)",
+        "lower-frequency": "193950000",
+        "upper-frequency": "194050000"
+      },
+      {
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+        "lower-frequency": "194050000",
+        "upper-frequency": "194150000"
+      },
+      {
+        "name": "42 (100GHz)",
+        "lower-frequency": "194150000",
+        "upper-frequency": "194250000"
+      },
+      {
+        "name": "43 (100GHz)",
+        "lower-frequency": "194250000",
+        "upper-frequency": "194350000"
+      },
+      {
+        "name": "44 (100GHz)",
+        "lower-frequency": "194350000",
+        "upper-frequency": "194450000"
+      },
+      {
+        "name": "45 (100GHz)",
+        "lower-frequency": "194450000",
+        "upper-frequency": "194550000"
+      },
+      {
+        "name": "46 (100GHz)",
+        "lower-frequency": "194550000",
+        "upper-frequency": "194650000"
+      },
+      {
+        "name": "47 (100GHz)",
+        "lower-frequency": "194650000",
+        "upper-frequency": "194750000"
+      },
+      {
+        "name": "48 (100GHz)",
+        "lower-frequency": "194750000",
+        "upper-frequency": "194850000"
+      },
+      {
+        "name": "49 (100GHz)",
+        "lower-frequency": "194850000",
+        "upper-frequency": "194950000"
+      },
+      {
+        "name": "50 (100GHz)",
+        "lower-frequency": "194950000",
+        "upper-frequency": "195050000"
+      },
+      {
+        "name": "51 (100GHz)",
+        "lower-frequency": "195050000",
+        "upper-frequency": "195150000"
+      },
+      {
+        "name": "52 (100GHz)",
+        "lower-frequency": "195150000",
+        "upper-frequency": "195250000"
+      },
+      {
+        "name": "53 (100GHz)",
+        "lower-frequency": "195250000",
+        "upper-frequency": "195350000"
+      },
+      {
+        "name": "54 (100GHz)",
+        "lower-frequency": "195350000",
+        "upper-frequency": "195450000"
+      },
+      {
+        "name": "55 (100GHz)",
+        "lower-frequency": "195450000",
+        "upper-frequency": "195550000"
+      },
+      {
+        "name": "56 (100GHz)",
+        "lower-frequency": "195550000",
+        "upper-frequency": "195650000"
+      },
+      {
+        "name": "57 (100GHz)",
+        "lower-frequency": "195650000",
+        "upper-frequency": "195750000"
+      },
+      {
+        "name": "58 (100GHz)",
+        "lower-frequency": "195750000",
+        "upper-frequency": "195850000"
+      },
+      {
+        "name": "59 (100GHz)",
+        "lower-frequency": "195850000",
+        "upper-frequency": "195950000"
+      },
+      {
+        "name": "60 (100GHz)",
+        "lower-frequency": "195950000",
+        "upper-frequency": "196050000"
+      }
+    ]
+  },
+  "czechlight-roadm-device:media-channels": [
+    {
+      "channel": "C-band",
+      "description": "Whole-band overview"
+    }
+  ]
+}