diff --git a/tests/czechlight-cfg-fs/data/v0_sdn-inline_empty/cmdline b/tests/czechlight-cfg-fs/data/v0_sdn-inline_empty/cmdline
new file mode 100644
index 0000000..7231fc3
--- /dev/null
+++ b/tests/czechlight-cfg-fs/data/v0_sdn-inline_empty/cmdline
@@ -0,0 +1 @@
+czechlight=sdn-inline-g2
diff --git a/tests/czechlight-cfg-fs/data/v0_sdn-inline_empty/expected.json b/tests/czechlight-cfg-fs/data/v0_sdn-inline_empty/expected.json
new file mode 100644
index 0000000..0967ef4
--- /dev/null
+++ b/tests/czechlight-cfg-fs/data/v0_sdn-inline_empty/expected.json
@@ -0,0 +1 @@
+{}
diff --git a/tests/czechlight-cfg-fs/data/v0_sdn-inline_empty/startup.json b/tests/czechlight-cfg-fs/data/v0_sdn-inline_empty/startup.json
new file mode 100644
index 0000000..2c63c08
--- /dev/null
+++ b/tests/czechlight-cfg-fs/data/v0_sdn-inline_empty/startup.json
@@ -0,0 +1,2 @@
+{
+}
diff --git a/tests/czechlight-cfg-fs/data/v0_sdn-inline_empty/version b/tests/czechlight-cfg-fs/data/v0_sdn-inline_empty/version
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/tests/czechlight-cfg-fs/data/v0_sdn-inline_empty/version
@@ -0,0 +1 @@
+0
diff --git a/tests/czechlight-cfg-fs/data/v0_sdn-inline_somedata/cmdline b/tests/czechlight-cfg-fs/data/v0_sdn-inline_somedata/cmdline
new file mode 100644
index 0000000..17d977e
--- /dev/null
+++ b/tests/czechlight-cfg-fs/data/v0_sdn-inline_somedata/cmdline
@@ -0,0 +1 @@
+czechlight=sdn-inline
diff --git a/tests/czechlight-cfg-fs/data/v0_sdn-inline_somedata/expected.json b/tests/czechlight-cfg-fs/data/v0_sdn-inline_somedata/expected.json
new file mode 100644
index 0000000..52a1f53
--- /dev/null
+++ b/tests/czechlight-cfg-fs/data/v0_sdn-inline_somedata/expected.json
@@ -0,0 +1,113 @@
+{
+  "ietf-interfaces:interfaces": {
+    "interface": [
+      {
+        "name": "br0",
+        "type": "iana-if-type:bridge",
+        "ietf-ip:ipv4": {
+          "czechlight-network:dhcp-client": true
+        },
+        "ietf-ip:ipv6": {
+          "enabled": true,
+          "autoconf": {
+            "create-global-addresses": true
+          }
+        }
+      },
+      {
+        "name": "eth1",
+        "type": "iana-if-type:ethernetCsmacd",
+        "czechlight-network:bridge": "br0"
+      },
+      {
+        "name": "eth0",
+        "type": "iana-if-type:ethernetCsmacd",
+        "czechlight-network:bridge": "br0"
+      }
+    ]
+  },
+  "ietf-keystore:keystore": {
+    "asymmetric-keys": {
+      "asymmetric-key": [
+        {
+          "name": "genkey",
+          "algorithm": "rsa2048",
+          "public-key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAs/tnburJOGHcvSOKw7SdOfEvZD28WatHUfuWRCWZoElXtX1sNkBFXvRbKahOR8sZ221iRdlZ89bBVtTeX8N2wgPApy+Xi/9X1Icee2cU7QC7UfnNnWMW1C6WEZQS8zt+6IAQsOLk1AWyFeAN1EZQfjM/2UfxOW/kxXBu+MeVvdjouZYs73mW4OyV6VptMkAk4JDk5ieEp65p/rQOF0pIvpnu56nl9cybQ1s3DAQ76ZJP5qf8VdKS2WcBlS7UwXAMvXPM5TiIebnXtrF8jTd3S3ApOyZv00jxn/s5l6L1VA0p5HyB9W4DfNztINRyE56BEBvPeJePNWwNg+sVClLdmQIDAQAB",
+          "private-key": "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"
+        }
+      ]
+    }
+  },
+  "ietf-netconf-acm:nacm": {
+    "rule-list": [
+      {
+        "name": "Allow DWDM control to the optics group",
+        "group": [
+          "optics"
+        ],
+        "rule": [
+          {
+            "name": "czechlight-roadm-device",
+            "module-name": "czechlight-roadm-device",
+            "action": "permit"
+          },
+          {
+            "name": "czechlight-inline-amp",
+            "module-name": "czechlight-inline-amp",
+            "action": "permit"
+          },
+          {
+            "name": "czechlight-coherent-add-drop",
+            "module-name": "czechlight-coherent-add-drop",
+            "action": "permit"
+          },
+          {
+            "name": "czechlight-calibration-device",
+            "module-name": "czechlight-calibration-device",
+            "action": "permit"
+          }
+        ]
+      }
+    ]
+  },
+  "ietf-netconf-server:netconf-server": {
+    "listen": {
+      "endpoint": [
+        {
+          "name": "default-ssh",
+          "ssh": {
+            "tcp-server-parameters": {
+              "local-address": "::",
+              "keepalives": {
+                "idle-time": 1,
+                "max-probes": 10,
+                "probe-interval": 5
+              }
+            },
+            "ssh-server-parameters": {
+              "server-identity": {
+                "host-key": [
+                  {
+                    "name": "default-key",
+                    "public-key": {
+                      "keystore-reference": "genkey"
+                    }
+                  }
+                ]
+              },
+              "client-authentication": {
+                "supported-authentication-methods": {
+                  "publickey": [null],
+                  "passsword": [null],
+                  "other": [
+                    "interactive"
+                  ]
+                }
+              }
+            }
+          }
+        }
+      ]
+    }
+  }
+}
diff --git a/tests/czechlight-cfg-fs/data/v0_sdn-inline_somedata/startup.json b/tests/czechlight-cfg-fs/data/v0_sdn-inline_somedata/startup.json
new file mode 100644
index 0000000..52a1f53
--- /dev/null
+++ b/tests/czechlight-cfg-fs/data/v0_sdn-inline_somedata/startup.json
@@ -0,0 +1,113 @@
+{
+  "ietf-interfaces:interfaces": {
+    "interface": [
+      {
+        "name": "br0",
+        "type": "iana-if-type:bridge",
+        "ietf-ip:ipv4": {
+          "czechlight-network:dhcp-client": true
+        },
+        "ietf-ip:ipv6": {
+          "enabled": true,
+          "autoconf": {
+            "create-global-addresses": true
+          }
+        }
+      },
+      {
+        "name": "eth1",
+        "type": "iana-if-type:ethernetCsmacd",
+        "czechlight-network:bridge": "br0"
+      },
+      {
+        "name": "eth0",
+        "type": "iana-if-type:ethernetCsmacd",
+        "czechlight-network:bridge": "br0"
+      }
+    ]
+  },
+  "ietf-keystore:keystore": {
+    "asymmetric-keys": {
+      "asymmetric-key": [
+        {
+          "name": "genkey",
+          "algorithm": "rsa2048",
+          "public-key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAs/tnburJOGHcvSOKw7SdOfEvZD28WatHUfuWRCWZoElXtX1sNkBFXvRbKahOR8sZ221iRdlZ89bBVtTeX8N2wgPApy+Xi/9X1Icee2cU7QC7UfnNnWMW1C6WEZQS8zt+6IAQsOLk1AWyFeAN1EZQfjM/2UfxOW/kxXBu+MeVvdjouZYs73mW4OyV6VptMkAk4JDk5ieEp65p/rQOF0pIvpnu56nl9cybQ1s3DAQ76ZJP5qf8VdKS2WcBlS7UwXAMvXPM5TiIebnXtrF8jTd3S3ApOyZv00jxn/s5l6L1VA0p5HyB9W4DfNztINRyE56BEBvPeJePNWwNg+sVClLdmQIDAQAB",
+          "private-key": "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"
+        }
+      ]
+    }
+  },
+  "ietf-netconf-acm:nacm": {
+    "rule-list": [
+      {
+        "name": "Allow DWDM control to the optics group",
+        "group": [
+          "optics"
+        ],
+        "rule": [
+          {
+            "name": "czechlight-roadm-device",
+            "module-name": "czechlight-roadm-device",
+            "action": "permit"
+          },
+          {
+            "name": "czechlight-inline-amp",
+            "module-name": "czechlight-inline-amp",
+            "action": "permit"
+          },
+          {
+            "name": "czechlight-coherent-add-drop",
+            "module-name": "czechlight-coherent-add-drop",
+            "action": "permit"
+          },
+          {
+            "name": "czechlight-calibration-device",
+            "module-name": "czechlight-calibration-device",
+            "action": "permit"
+          }
+        ]
+      }
+    ]
+  },
+  "ietf-netconf-server:netconf-server": {
+    "listen": {
+      "endpoint": [
+        {
+          "name": "default-ssh",
+          "ssh": {
+            "tcp-server-parameters": {
+              "local-address": "::",
+              "keepalives": {
+                "idle-time": 1,
+                "max-probes": 10,
+                "probe-interval": 5
+              }
+            },
+            "ssh-server-parameters": {
+              "server-identity": {
+                "host-key": [
+                  {
+                    "name": "default-key",
+                    "public-key": {
+                      "keystore-reference": "genkey"
+                    }
+                  }
+                ]
+              },
+              "client-authentication": {
+                "supported-authentication-methods": {
+                  "publickey": [null],
+                  "passsword": [null],
+                  "other": [
+                    "interactive"
+                  ]
+                }
+              }
+            }
+          }
+        }
+      ]
+    }
+  }
+}
diff --git a/tests/czechlight-cfg-fs/data/v0_sdn-inline_somedata/version b/tests/czechlight-cfg-fs/data/v0_sdn-inline_somedata/version
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/tests/czechlight-cfg-fs/data/v0_sdn-inline_somedata/version
@@ -0,0 +1 @@
+0
diff --git a/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_empty/cmdline b/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_empty/cmdline
new file mode 100644
index 0000000..6b1d906
--- /dev/null
+++ b/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_empty/cmdline
@@ -0,0 +1 @@
+czechlight=sdn-roadm-line
diff --git a/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_empty/expected.json b/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_empty/expected.json
new file mode 100644
index 0000000..4ab1a31
--- /dev/null
+++ b/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_empty/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"
+      },
+      {
+        "name": "24.0",
+        "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"
+      },
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+      },
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+      },
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+      },
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+        "lower-frequency": "193775000",
+        "upper-frequency": "193825000"
+      },
+      {
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+        "lower-frequency": "193825000",
+        "upper-frequency": "193875000"
+      },
+      {
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+        "lower-frequency": "193875000",
+        "upper-frequency": "193925000"
+      },
+      {
+        "name": "39.5",
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+        "upper-frequency": "193975000"
+      },
+      {
+        "name": "40.0",
+        "lower-frequency": "193975000",
+        "upper-frequency": "194025000"
+      },
+      {
+        "name": "40.5",
+        "lower-frequency": "194025000",
+        "upper-frequency": "194075000"
+      },
+      {
+        "name": "41.0",
+        "lower-frequency": "194075000",
+        "upper-frequency": "194125000"
+      },
+      {
+        "name": "41.5",
+        "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"
+      },
+      {
+        "name": "45.0",
+        "lower-frequency": "194475000",
+        "upper-frequency": "194525000"
+      },
+      {
+        "name": "45.5",
+        "lower-frequency": "194525000",
+        "upper-frequency": "194575000"
+      },
+      {
+        "name": "46.0",
+        "lower-frequency": "194575000",
+        "upper-frequency": "194625000"
+      },
+      {
+        "name": "46.5",
+        "lower-frequency": "194625000",
+        "upper-frequency": "194675000"
+      },
+      {
+        "name": "47.0",
+        "lower-frequency": "194675000",
+        "upper-frequency": "194725000"
+      },
+      {
+        "name": "47.5",
+        "lower-frequency": "194725000",
+        "upper-frequency": "194775000"
+      },
+      {
+        "name": "48.0",
+        "lower-frequency": "194775000",
+        "upper-frequency": "194825000"
+      },
+      {
+        "name": "48.5",
+        "lower-frequency": "194825000",
+        "upper-frequency": "194875000"
+      },
+      {
+        "name": "49.0",
+        "lower-frequency": "194875000",
+        "upper-frequency": "194925000"
+      },
+      {
+        "name": "49.5",
+        "lower-frequency": "194925000",
+        "upper-frequency": "194975000"
+      },
+      {
+        "name": "50.0",
+        "lower-frequency": "194975000",
+        "upper-frequency": "195025000"
+      },
+      {
+        "name": "50.5",
+        "lower-frequency": "195025000",
+        "upper-frequency": "195075000"
+      },
+      {
+        "name": "51.0",
+        "lower-frequency": "195075000",
+        "upper-frequency": "195125000"
+      },
+      {
+        "name": "51.5",
+        "lower-frequency": "195125000",
+        "upper-frequency": "195175000"
+      },
+      {
+        "name": "52.0",
+        "lower-frequency": "195175000",
+        "upper-frequency": "195225000"
+      },
+      {
+        "name": "52.5",
+        "lower-frequency": "195225000",
+        "upper-frequency": "195275000"
+      },
+      {
+        "name": "53.0",
+        "lower-frequency": "195275000",
+        "upper-frequency": "195325000"
+      },
+      {
+        "name": "53.5",
+        "lower-frequency": "195325000",
+        "upper-frequency": "195375000"
+      },
+      {
+        "name": "54.0",
+        "lower-frequency": "195375000",
+        "upper-frequency": "195425000"
+      },
+      {
+        "name": "54.5",
+        "lower-frequency": "195425000",
+        "upper-frequency": "195475000"
+      },
+      {
+        "name": "55.0",
+        "lower-frequency": "195475000",
+        "upper-frequency": "195525000"
+      },
+      {
+        "name": "55.5",
+        "lower-frequency": "195525000",
+        "upper-frequency": "195575000"
+      },
+      {
+        "name": "56.0",
+        "lower-frequency": "195575000",
+        "upper-frequency": "195625000"
+      },
+      {
+        "name": "56.5",
+        "lower-frequency": "195625000",
+        "upper-frequency": "195675000"
+      },
+      {
+        "name": "57.0",
+        "lower-frequency": "195675000",
+        "upper-frequency": "195725000"
+      },
+      {
+        "name": "57.5",
+        "lower-frequency": "195725000",
+        "upper-frequency": "195775000"
+      },
+      {
+        "name": "58.0",
+        "lower-frequency": "195775000",
+        "upper-frequency": "195825000"
+      },
+      {
+        "name": "58.5",
+        "lower-frequency": "195825000",
+        "upper-frequency": "195875000"
+      },
+      {
+        "name": "59.0",
+        "lower-frequency": "195875000",
+        "upper-frequency": "195925000"
+      },
+      {
+        "name": "59.5",
+        "lower-frequency": "195925000",
+        "upper-frequency": "195975000"
+      },
+      {
+        "name": "60.0",
+        "lower-frequency": "195975000",
+        "upper-frequency": "196025000"
+      },
+      {
+        "name": "60.5",
+        "lower-frequency": "196025000",
+        "upper-frequency": "196075000"
+      },
+      {
+        "name": "61.0",
+        "lower-frequency": "196075000",
+        "upper-frequency": "196125000"
+      },
+      {
+        "name": "14 (100GHz)",
+        "lower-frequency": "191350000",
+        "upper-frequency": "191450000"
+      },
+      {
+        "name": "15 (100GHz)",
+        "lower-frequency": "191450000",
+        "upper-frequency": "191550000"
+      },
+      {
+        "name": "16 (100GHz)",
+        "lower-frequency": "191550000",
+        "upper-frequency": "191650000"
+      },
+      {
+        "name": "17 (100GHz)",
+        "lower-frequency": "191650000",
+        "upper-frequency": "191750000"
+      },
+      {
+        "name": "18 (100GHz)",
+        "lower-frequency": "191750000",
+        "upper-frequency": "191850000"
+      },
+      {
+        "name": "19 (100GHz)",
+        "lower-frequency": "191850000",
+        "upper-frequency": "191950000"
+      },
+      {
+        "name": "20 (100GHz)",
+        "lower-frequency": "191950000",
+        "upper-frequency": "192050000"
+      },
+      {
+        "name": "21 (100GHz)",
+        "lower-frequency": "192050000",
+        "upper-frequency": "192150000"
+      },
+      {
+        "name": "22 (100GHz)",
+        "lower-frequency": "192150000",
+        "upper-frequency": "192250000"
+      },
+      {
+        "name": "23 (100GHz)",
+        "lower-frequency": "192250000",
+        "upper-frequency": "192350000"
+      },
+      {
+        "name": "24 (100GHz)",
+        "lower-frequency": "192350000",
+        "upper-frequency": "192450000"
+      },
+      {
+        "name": "25 (100GHz)",
+        "lower-frequency": "192450000",
+        "upper-frequency": "192550000"
+      },
+      {
+        "name": "26 (100GHz)",
+        "lower-frequency": "192550000",
+        "upper-frequency": "192650000"
+      },
+      {
+        "name": "27 (100GHz)",
+        "lower-frequency": "192650000",
+        "upper-frequency": "192750000"
+      },
+      {
+        "name": "28 (100GHz)",
+        "lower-frequency": "192750000",
+        "upper-frequency": "192850000"
+      },
+      {
+        "name": "29 (100GHz)",
+        "lower-frequency": "192850000",
+        "upper-frequency": "192950000"
+      },
+      {
+        "name": "30 (100GHz)",
+        "lower-frequency": "192950000",
+        "upper-frequency": "193050000"
+      },
+      {
+        "name": "31 (100GHz)",
+        "lower-frequency": "193050000",
+        "upper-frequency": "193150000"
+      },
+      {
+        "name": "32 (100GHz)",
+        "lower-frequency": "193150000",
+        "upper-frequency": "193250000"
+      },
+      {
+        "name": "33 (100GHz)",
+        "lower-frequency": "193250000",
+        "upper-frequency": "193350000"
+      },
+      {
+        "name": "34 (100GHz)",
+        "lower-frequency": "193350000",
+        "upper-frequency": "193450000"
+      },
+      {
+        "name": "35 (100GHz)",
+        "lower-frequency": "193450000",
+        "upper-frequency": "193550000"
+      },
+      {
+        "name": "36 (100GHz)",
+        "lower-frequency": "193550000",
+        "upper-frequency": "193650000"
+      },
+      {
+        "name": "37 (100GHz)",
+        "lower-frequency": "193650000",
+        "upper-frequency": "193750000"
+      },
+      {
+        "name": "38 (100GHz)",
+        "lower-frequency": "193750000",
+        "upper-frequency": "193850000"
+      },
+      {
+        "name": "39 (100GHz)",
+        "lower-frequency": "193850000",
+        "upper-frequency": "193950000"
+      },
+      {
+        "name": "40 (100GHz)",
+        "lower-frequency": "193950000",
+        "upper-frequency": "194050000"
+      },
+      {
+        "name": "41 (100GHz)",
+        "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"
+    }
+  ]
+}
diff --git a/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_empty/startup.json b/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_empty/startup.json
new file mode 100644
index 0000000..2c63c08
--- /dev/null
+++ b/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_empty/startup.json
@@ -0,0 +1,2 @@
+{
+}
diff --git a/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_empty/version b/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_empty/version
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_empty/version
@@ -0,0 +1 @@
+0
diff --git a/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_with_altered_initial_data/cmdline b/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_with_altered_initial_data/cmdline
new file mode 100644
index 0000000..6b1d906
--- /dev/null
+++ b/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_with_altered_initial_data/cmdline
@@ -0,0 +1 @@
+czechlight=sdn-roadm-line
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"
+      },
+      {
+        "name": "24.0",
+        "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"
+      },
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+        "lower-frequency": "192350000",
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+      {
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+      },
+      {
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+        "lower-frequency": "194050000",
+        "upper-frequency": "194150000"
+      },
+      {
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+        "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"
+    }
+  ]
+}
diff --git a/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_with_altered_initial_data/startup.json b/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_with_altered_initial_data/startup.json
new file mode 100644
index 0000000..4435818
--- /dev/null
+++ b/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_with_altered_initial_data/startup.json
@@ -0,0 +1,11 @@
+{
+  "czechlight-roadm-device:channel-plan": {
+    "channel": [
+      {
+        "name": "haha",
+        "lower-frequency": "195325000",
+        "upper-frequency": "195425000"
+      }
+    ]
+  }
+}
diff --git a/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_with_altered_initial_data/version b/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_with_altered_initial_data/version
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_with_altered_initial_data/version
@@ -0,0 +1 @@
+0