[sonic_eeprom] Add unit test for eeprom_tlvinfo_test

tests/eeprom_tlvinfo_test.py

@@ -0,0 +1,58 @@
+
+from queue import Empty
+import os
+import sys
+if sys.version_info.major == 3:
+    from unittest import mock
+else:
+    import mock
+
+from sonic_eeprom import eeprom_base
+from sonic_eeprom import eeprom_tlvinfo
+
+""" test_eeprom output:
+TlvInfo Header:
+   Id String:    TlvInfo
+   Version:      1
+   Total Length: 177
+TLV Name             Code Len Value
+-------------------- ---- --- -----
+Product Name         0x21  11 7215 IXS-T1
+Part Number          0x22  14 3HE16794AARA01
+Serial Number        0x23  11 NK203110020
+Base MAC Address     0x24   6 50:E0:EF:51:27:91
+Manufacture Date     0x25  19 08/24/2020 16:25:29
+Platform Name        0x28  26 armhf-nokia_ixs7215_52x-r0
+ONIE Version         0x29  45 2019.11-onie_version-nokia_ixs7215_52x-v1.5.1
+MAC Addresses        0x2A   2 64
+Service Tag          0x2F  10 0000000000
+Vendor Extension     0xFD   7 
+CRC-32               0xFE   4 0x7E1374C3
+
+(checksum valid) """
+
+tests_dir = os.path.dirname(os.path.abspath(__file__))
+eeprom_path = os.path.join(tests_dir, 'test_eeprom')
+
+class TestEEpromTlvInfo:
+    def test_eeprom(self):
+        tlvInfo = eeprom_tlvinfo.TlvInfoDecoder(eeprom_path, 0, "", True)
+        e = tlvInfo.read_eeprom_bytes(256)
+        tlvInfo.decode_eeprom(e)
+
+        assert(tlvInfo.p == eeprom_path)
+        assert(tlvInfo._TLV_DISPLAY_VENDOR_EXT == True)
+
+        assert(tlvInfo.is_valid_tlvinfo_header(e) == True)
+        (tf, crc) = tlvInfo.is_checksum_valid(e)
+        assert(tf == True)
+
+        (tf, s) = tlvInfo.get_tlv_field(e, tlvInfo._TLV_CODE_PRODUCT_NAME)
+        assert(tf == True)
+        assert(s[2].decode() == "7215 IXS-T1")
+
+        (tf, s) = tlvInfo.get_tlv_field(e, tlvInfo._TLV_CODE_PART_NUMBER)
+        assert(tf == True)
+        assert(s[2].decode() == "3HE16794AARA01")
+
+        assert(tlvInfo.base_mac_addr(e) == "50:E0:EF:51:27:91")