Update pcieutil error message on loading common pcie module (sonic-ne…

…t#2786)

* Update pcieutil load module error message

* Add pcieutil test for load module warning to not print to output

* Update pcieutil import test

* Update pcieutil import test

* Fix pcieutil import test

pcieutil/main.py

@@ -54,7 +54,7 @@ def load_platform_pcieutil():
         from sonic_platform.pcie import Pcie
         platform_pcieutil = Pcie(platform_path)
     except ImportError as e:
-        log.log_warning("Failed to load platform Pcie module. Error : {}, fallback to load Pcie common utility.".format(str(e)), True)
+        log.log_warning("Failed to load platform Pcie module. Warning : {}, fallback to load Pcie common utility.".format(str(e)))
         try:
             from sonic_platform_base.sonic_pcie.pcie_common import PcieUtil
             platform_pcieutil = PcieUtil(platform_path)

tests/pcieutil_test.py

@@ -3,6 +3,7 @@
 from unittest import mock
 
 from click.testing import CliRunner
+from io import StringIO
 
 test_path = os.path.dirname(os.path.abspath(__file__))
 modules_path = os.path.dirname(test_path)
@@ -156,6 +157,8 @@
 +---------------------+-----------+
 """
 
+pcieutil_load_module_warning_msg = "Failed to load platform Pcie module. Warning : No module named 'sonic_platform.pcie', fallback to load Pcie common utility."
+
 class TestPcieUtil(object):
     @classmethod
     def setup_class(cls):
@@ -199,6 +202,16 @@ def test_aer_option_device(self):
         result = runner.invoke(pcieutil.cli.commands["pcie-aer"].commands["correctable"], ["-d", "0:1.0"])
         assert result.output == pcieutil_pcie_aer_correctable_dev_output
 
+    def test_load_pcie_module_warning(self): 
+        stdout = sys.stdout
+        sys.stdout = result = StringIO()
+        try:
+            pcieutil.load_platform_pcieutil()
+        except ImportError:
+            pass
+        sys.stdout = stdout
+        assert pcieutil_load_module_warning_msg not in result.getvalue()
+
     @classmethod
     def teardown_class(cls):
         print("TEARDOWN")