add ethtool parser tests

tests/fixtures/generic/ethtool--default1.json

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+{"name":"enp0s3","supported_pause_frame_use":"No","supports_auto_negotiation":true,"supported_fec_modes":"Not reported","advertised_pause_frame_use":false,"advertised_auto_negotiation":true,"advertised_fec_modes":"Not reported","speed":"1000Mb/s","duplex":"Full","port":"Twisted Pair","phyad":"0","transceiver":"internal","auto_negotiation":false,"mdi_x":"off (auto)","supports_wake_on":"umbg","wake_on":"d","link_detected":true,"supported_ports":["TP"],"supported_link_modes":["10baseT/Half","10baseT/Full","100baseT/Half","100baseT/Full","1000baseT/Full"],"advertised_link_modes":["10baseT/Half","10baseT/Full","100baseT/Half","100baseT/Full","1000baseT/Full"],"current_message_level":["0x00000007 (7)","drv probe link"],"speed_bps":1000000000}

tests/fixtures/generic/ethtool--default1.out

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+Settings for enp0s3:
+	Supported ports: [ TP ]
+	Supported link modes:   10baseT/Half 10baseT/Full 
+	                        100baseT/Half 100baseT/Full 
+	                        1000baseT/Full 
+	Supported pause frame use: No
+	Supports auto-negotiation: Yes
+	Supported FEC modes: Not reported
+	Advertised link modes:  10baseT/Half 10baseT/Full 
+	                        100baseT/Half 100baseT/Full 
+	                        1000baseT/Full 
+	Advertised pause frame use: No
+	Advertised auto-negotiation: Yes
+	Advertised FEC modes: Not reported
+	Speed: 1000Mb/s
+	Duplex: Full
+	Port: Twisted Pair
+	PHYAD: 0
+	Transceiver: internal
+	Auto-negotiation: on
+	MDI-X: off (auto)
+	Supports Wake-on: umbg
+	Wake-on: d
+	Current message level: 0x00000007 (7)
+			       drv probe link
+	Link detected: yes

tests/fixtures/generic/ethtool--default2.json

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+{"name":"enp1s0","supported_pause_frame_use":"Symmetric Receive-only","supports_auto_negotiation":true,"supported_fec_modes":"Not reported","advertised_pause_frame_use":false,"advertised_auto_negotiation":true,"advertised_fec_modes":"Not reported","speed":"40000Mb/s","duplex":"Full","auto_negotiation":false,"port":"FIBRE","phyad":"0","transceiver":"internal","supports_wake_on":"d","wake_on":"d","link_detected":true,"supported_ports":["FIBRE"],"supported_link_modes":["10000baseKX4/Full","40000baseCR4/Full","40000baseSR4/Full","56000baseCR4/Full","56000baseSR4/Full","1000baseX/Full","10000baseCR/Full","10000baseSR/Full"],"advertised_link_modes":["10000baseKX4/Full","40000baseCR4/Full","40000baseSR4/Full","1000baseX/Full","10000baseCR/Full","10000baseSR/Full"],"current_message_level":["0x00000014 (20)","link ifdown"],"speed_bps":40000000000}

tests/fixtures/generic/ethtool--default2.out

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+Settings for enp1s0:
+        Supported ports: [ FIBRE ]
+        Supported link modes:   10000baseKX4/Full
+                                40000baseCR4/Full
+                                40000baseSR4/Full
+                                56000baseCR4/Full
+                                56000baseSR4/Full
+                                1000baseX/Full
+                                10000baseCR/Full
+                                10000baseSR/Full
+        Supported pause frame use: Symmetric Receive-only
+        Supports auto-negotiation: Yes
+        Supported FEC modes: Not reported
+        Advertised link modes:  10000baseKX4/Full
+                                40000baseCR4/Full
+                                40000baseSR4/Full
+                                1000baseX/Full
+                                10000baseCR/Full
+                                10000baseSR/Full
+        Advertised pause frame use: Symmetric
+        Advertised auto-negotiation: Yes
+        Advertised FEC modes: Not reported
+        Speed: 40000Mb/s
+        Duplex: Full
+        Auto-negotiation: off
+        Port: FIBRE
+        PHYAD: 0
+        Transceiver: internal
+        Supports Wake-on: d
+        Wake-on: d
+        Current message level: 0x00000014 (20)
+                               link ifdown
+        Link detected: yes

tests/fixtures/generic/ethtool--module-info.json

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+{"identifier":"0x03 (SFP)","extended_identifier":"0x04 (GBIC/SFP defined by 2-wire interface ID)","connector":"0x21 (Copper pigtail)","transceiver_codes":"0x01 0x00 0x00 0x04 0x00 0x04 0x80 0xd5 0x00","transceiver_type":["Infiniband: 1X Copper Passive","Ethernet: 1000BASE-CX","Passive Cable","FC: Twin Axial Pair (TW)","FC: 1200 MBytes/sec","FC: 800 MBytes/sec","FC: 400 MBytes/sec","FC: 200 MBytes/sec","FC: 100 MBytes/sec"],"encoding":"0x00 (unspecified)","br_nominal":"10300MBd","rate_identifier":"0x00 (unspecified)","length_smf_km":"0km","length_smf":"0m","length_50um":"0m","length_62_5um":"0m","length_copper":"2m","length_om3":"0m","passive_cu_cmplnce":"0x01 (SFF-8431 appendix E) [SFF-8472 rev10.4 only]","vendor_name":"UbiquitiNetworks","vendor_oui":"00:40:20","vendor_pn":"UDC-2","vendor_rev":"","option_values":"0x00 0x00","br_margin_max":"0%","br_margin_min":"0%"}

tests/fixtures/generic/ethtool--module-info.out

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+        Identifier                                : 0x03 (SFP)
+        Extended identifier                       : 0x04 (GBIC/SFP defined by 2-wire interface ID)
+        Connector                                 : 0x21 (Copper pigtail)
+        Transceiver codes                         : 0x01 0x00 0x00 0x04 0x00 0x04 0x80 0xd5 0x00
+        Transceiver type                          : Infiniband: 1X Copper Passive
+        Transceiver type                          : Ethernet: 1000BASE-CX
+        Transceiver type                          : Passive Cable
+        Transceiver type                          : FC: Twin Axial Pair (TW)
+        Transceiver type                          : FC: 1200 MBytes/sec
+        Transceiver type                          : FC: 800 MBytes/sec
+        Transceiver type                          : FC: 400 MBytes/sec
+        Transceiver type                          : FC: 200 MBytes/sec
+        Transceiver type                          : FC: 100 MBytes/sec
+        Encoding                                  : 0x00 (unspecified)
+        BR, Nominal                               : 10300MBd
+        Rate identifier                           : 0x00 (unspecified)
+        Length (SMF,km)                           : 0km
+        Length (SMF)                              : 0m
+        Length (50um)                             : 0m
+        Length (62.5um)                           : 0m
+        Length (Copper)                           : 2m
+        Length (OM3)                              : 0m
+        Passive Cu cmplnce.                       : 0x01 (SFF-8431 appendix E) [SFF-8472 rev10.4 only]
+        Vendor name                               : UbiquitiNetworks
+        Vendor OUI                                : 00:40:20
+        Vendor PN                                 : UDC-2
+        Vendor rev                                : 
+        Option values                             : 0x00 0x00
+        BR margin, max                            : 0%
+        BR margin, min                            : 0%

tests/test_ethtool.py

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+import unittest
+
+from tests import utils_for_test as test_utils
+
+# Execute these steps for standard tests:
+# - Save this file as `test_{parser_name}.py` since the helper methods extract parser names from the filename.
+# - Organize fixtures in `tests/fixtures` for optimal structure.
+# - Format fixtures as follows (using double dashes):
+#     - `{parser_name}--{some_test_description}.out` for command output.
+#     - `{parser_name}--{some_test_description}.json` for expected JSON after parsing.
+
+class MyTests(unittest.TestCase):
+
+    def test_ethtool_nodata(self):
+        """
+        Test 'ethtool' with no data
+        """
+        test_utils.run_no_data(self, __file__, {})
+
+    def test_ethtool_all_fixtures(self):
+        """
+        Test 'ethtool' with various fixtures
+        """
+        test_utils.run_all_fixtures(self, __file__)
+
+
+if __name__ == '__main__':
+    unittest.main()