Add unit test infrastructure (sonic-net#139)

Add infrastructure for running unit tests

Author: vdahiya12

.gitignore

@@ -1,5 +1,13 @@
 *.pyc
 */__pycache__/
+tests/*.pyc
+tests/__pycache__/
+
+# Distribution / packaging
 build/
 sonic_platform_common.egg-info/
-.cache
+.cache
+
+# Unit test / coverage reports
+.coverage
+htmlcov/

pytest.ini

@@ -0,0 +1,2 @@
+[pytest]
+addopts = --cov=sonic_platform_base --cov-report html

setup.cfg

@@ -0,0 +1,2 @@
+[aliases]
+test=pytest

setup.py

@@ -34,9 +34,14 @@
         'redis',
         'sonic-py-common'
     ],
-    setup_requires= [
+    setup_requires = [
+        'pytest-runner',
         'wheel'
     ],
+    tests_require = [
+        'pytest',
+        'pytest-cov',
+    ],
     classifiers=[
         'Development Status :: 3 - Alpha',
         'Environment :: Plugins',

tests/__init__.py

@@ -0,0 +1,54 @@
+import os
+import sys
+
+import pytest
+try:
+    import sonic_platform_base.sonic_sfp.sfputilhelper
+except Exception as e:
+    print("Failed to load sonic_platform_base.sonic_sfp.sfputilhelper  due to {}".format(repr(e)))
+
+
+@pytest.fixture(scope="class")
+def setup_class(request):
+    # Configure the setup
+    test_dir = os.path.dirname(os.path.realpath(__file__))
+    request.cls.port_config = os.path.join(
+        test_dir, 't0-sample-port-config.ini')
+
+    request.cls.port_config = sonic_platform_base.sonic_sfp.sfputilhelper.SfpUtilHelper()
+
+
+@pytest.mark.usefixtures("setup_class")
+class TestSfpUtilHelper(object):
+
+    platform_sfputil = None
+    port_config = None
+
+    def test_read_port_mappings(self):
+
+        try:
+            platform_sfputil.read_porttab_mappings(self.port_config, 0)
+        except Exception as e:
+            print("Failed to read port tab mappings to {}".format(repr(e)))
+
+        PORT_LIST = ["Ethernet0",
+                     "Ethernet4",
+                     "Ethernet8",
+                     "Ethernet12",
+                     "Ethernet16",
+                     "Ethernet20",
+                     "Ethernet24",
+                     "Ethernet28",
+                     "Ethernet32",
+                     "Ethernet36",
+                     "Ethernet40",
+                     "Ethernet44",
+                     "Ethernet48"]
+
+        if self.platform_sfputil is not None:
+            logical_port_list = self.platform_sfputil.logical
+            assert len(logical_port_name) == len(self.port_list)
+            for logical_port_name in logical_port_list:
+                assert logical_port_name in PORT_LIST
+        else:
+            print("platform_sfputil is None, cannot read Ports")

tests/sfputilhelper_test.py

@@ -0,0 +1,14 @@
+# name          lanes             alias
+Ethernet0       29,30,31,32       fortyGigE0/0
+Ethernet4       25,26,27,28       fortyGigE0/4
+Ethernet8       37,38,39,40       fortyGigE0/8
+Ethernet12      33,34,35,36       fortyGigE0/12
+Ethernet16      41,42,43,44       fortyGigE0/16
+Ethernet20      45,46,47,48       fortyGigE0/20
+Ethernet24      5,6,7,8           fortyGigE0/24
+Ethernet28      1,2,3,4           fortyGigE0/28
+Ethernet32      9,10,11,12        fortyGigE0/32
+Ethernet36      13,14,15,16       fortyGigE0/36
+Ethernet40      21,22,23,24       fortyGigE0/40
+Ethernet44      17,18,19,20       fortyGigE0/44
+Ethernet48      49,50,51,52       fortyGigE0/48