prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  VERIFY-BOOT-ERROR-WARNINGS.py: fix test case
  Test case is not running properly on redhat. Run the script directly, not through lisav2 to observe this better.
  
  Release: 7.7 Snapshot 5 (most likely 7.6 should also have this behavior)
  
  Issues to be fixed:
  - ignore if syslog is not present (that exists only on ubuntu/debian).
  [root@rhel77gen2 Linux]# python VERIFY-BOOT-ERROR-WARNINGS.py
  2.7.5 (default, Jun 11 2019, 14:33:56)
  [GCC 4.8.5 20150623 (Red Hat 4.8.5-39)]
  grep: /var/log/syslog: No such file or directory
  
  - fix grep search
  [root@rhel77gen2 Linux]#  grep -nw '/var/log/messages' -e 'mlx5'
  [root@rhel77gen2 Linux]# grep /var/log/messages -e mlx5
  Jul 29 10:02:27 rhel77gen2 kernel: mlx5_core ae35:00:02.0: firmware version: 14.23.1020
  
  
  </issue>
  <code>
  [start of Testscripts/Linux/VERIFY-BOOT-ERROR-WARNINGS.py]
  1 #!/usr/bin/python
  2 # Copyright (c) Microsoft Corporation. All rights reserved.
  3 # Licensed under the Apache License.
  4 from azuremodules import *
  5 
  6 white_list_xml = "ignorable-boot-errors.xml"
  7 
  8 
  9 def RunTest():
  10     UpdateState("TestRunning")
  11     RunLog.info("Checking for ERROR and WARNING messages in system logs.")
  12     errors = Run("grep -nw '/var/log/syslog' -e 'error' --ignore-case && grep -nw '/var/log/messages' -e 'error' --ignore-case")
  13     warnings = Run("grep -nw '/var/log/syslog' -e 'warning' --ignore-case && grep -nw '/var/log/messages' -e 'warning' --ignore-case")
  14     failures = Run("grep -nw '/var/log/syslog' -e 'fail' --ignore-case && grep -nw '/var/log/messages' -e 'fail' --ignore-case")
  15     if (not errors and not warnings and not failures):
  16         RunLog.info('Could not find ERROR/WARNING/FAILURE messages in syslog/messages log file.')
  17         ResultLog.info('PASS')
  18     else:
  19         if white_list_xml and os.path.isfile(white_list_xml):
  20             try:
  21                 import xml.etree.cElementTree as ET
  22             except ImportError:
  23                 import xml.etree.ElementTree as ET
  24 
  25             white_list_file = ET.parse(white_list_xml)
  26             xml_root = white_list_file.getroot()
  27 
  28             RunLog.info('Checking ignorable boot ERROR/WARNING/FAILURE messages...')
  29             for node in xml_root:
  30                 if (failures and node.tag == "failures"):
  31                     failures = RemoveIgnorableMessages(failures, node)
  32                 if (errors and node.tag == "errors"):
  33                     errors = RemoveIgnorableMessages(errors, node)
  34                 if (warnings and node.tag == "warnings"):
  35                     warnings = RemoveIgnorableMessages(warnings, node)
  36 
  37         if (errors or warnings or failures):
  38             RunLog.error('Found ERROR/WARNING/FAILURE messages in logs.')
  39             if(errors):
  40                 SplitLog('Errors', errors)
  41             if(warnings):
  42                 SplitLog('warnings', warnings)
  43             if(failures):
  44                 SplitLog('failures', failures)
  45             ResultLog.error('FAIL')
  46         else:
  47             ResultLog.info('PASS')
  48     UpdateState("TestCompleted")
  49 
  50 
  51 def SplitLog(logType, logValues):
  52     for logEntry in logValues:
  53         RunLog.info(logType + ': ' + logEntry)
  54 
  55 
  56 def RemoveIgnorableMessages(messages, keywords_xml_node):
  57     message_list = messages.strip().split('\n')
  58     valid_list = []
  59     for msg in message_list:
  60         for keywords in keywords_xml_node:
  61             if keywords.text in msg:
  62                 RunLog.info('Ignorable ERROR/WARNING/FAILURE message: ' + msg)
  63                 break
  64         else:
  65             valid_list.append(msg)
  66     if len(valid_list) > 0:
  67         return valid_list
  68     else:
  69         return None
  70 
  71 RunTest()
  72
  [end of Testscripts/Linux/VERIFY-BOOT-ERROR-WARNINGS.py]
  </code>
  
  I need you to solve this issue by generating a single patch file that I can apply directly to this repository using git apply. Please respond with a single patch file in the following format.
  <patch>
  diff --git a/file.py b/file.py
  --- a/file.py
  +++ b/file.py
  @@ -1,27 +1,35 @@
   def euclidean(a, b):
  -    while b:
  -        a, b = b, a % b
  -    return a
  +    if b == 0:
  +        return a
  +    return euclidean(b, a % b)
   
   
   def bresenham(x0, y0, x1, y1):
       points = []
       dx = abs(x1 - x0)
       dy = abs(y1 - y0)
  -    sx = 1 if x0 < x1 else -1
  -    sy = 1 if y0 < y1 else -1
  -    err = dx - dy
  +    x, y = x0, y0
  +    sx = -1 if x0 > x1 else 1
  +    sy = -1 if y0 > y1 else 1
   
  -    while True:
  -        points.append((x0, y0))
  -        if x0 == x1 and y0 == y1:
  -            break
  -        e2 = 2 * err
  -        if e2 > -dy:
  -            err -= dy
  -            x0 += sx
  -        if e2 < dx:
  -            err += dx
  -            y0 += sy
  +    if dx > dy:
  +        err = dx / 2.0
  +        while x != x1:
  +            points.append((x, y))
  +            err -= dy
  +            if err < 0:
  +                y += sy
  +                err += dx
  +            x += sx
  +    else:
  +        err = dy / 2.0
  +        while y != y1:
  +            points.append((x, y))
  +            err -= dx
  +            if err < 0:
  +                x += sx
  +                err += dy
  +            y += sy
  +
  +    points.append((x, y))
       return points
  
  </patch>
golden_diff: diff --git a/Testscripts/Linux/VERIFY-BOOT-ERROR-WARNINGS.py b/Testscripts/Linux/VERIFY-BOOT-ERROR-WARNINGS.py
  --- a/Testscripts/Linux/VERIFY-BOOT-ERROR-WARNINGS.py
  +++ b/Testscripts/Linux/VERIFY-BOOT-ERROR-WARNINGS.py
  @@ -9,9 +9,9 @@
   def RunTest():
       UpdateState("TestRunning")
       RunLog.info("Checking for ERROR and WARNING messages in system logs.")
  -    errors = Run("grep -nw '/var/log/syslog' -e 'error' --ignore-case && grep -nw '/var/log/messages' -e 'error' --ignore-case")
  -    warnings = Run("grep -nw '/var/log/syslog' -e 'warning' --ignore-case && grep -nw '/var/log/messages' -e 'warning' --ignore-case")
  -    failures = Run("grep -nw '/var/log/syslog' -e 'fail' --ignore-case && grep -nw '/var/log/messages' -e 'fail' --ignore-case")
  +    errors = Run("grep -nw '/var/log/syslog' -e 'error' --ignore-case --no-message && grep /var/log/messages -e error --ignore-case --no-message")
  +    warnings = Run("grep -nw '/var/log/syslog' -e 'warning' --ignore-case --no-message && grep /var/log/messages -e warning --ignore-case --no-message")
  +    failures = Run("grep -nw '/var/log/syslog' -e 'fail' --ignore-case --no-message && grep /var/log/messages -e fail --ignore-case --no-message")
       if (not errors and not warnings and not failures):
           RunLog.info('Could not find ERROR/WARNING/FAILURE messages in syslog/messages log file.')
           ResultLog.info('PASS')
  
verification_info: {"golden_diff": "diff --git a/Testscripts/Linux/VERIFY-BOOT-ERROR-WARNINGS.py b/Testscripts/Linux/VERIFY-BOOT-ERROR-WARNINGS.py\n--- a/Testscripts/Linux/VERIFY-BOOT-ERROR-WARNINGS.py\n+++ b/Testscripts/Linux/VERIFY-BOOT-ERROR-WARNINGS.py\n@@ -9,9 +9,9 @@\n def RunTest():\n     UpdateState(\"TestRunning\")\n     RunLog.info(\"Checking for ERROR and WARNING messages in system logs.\")\n-    errors = Run(\"grep -nw '/var/log/syslog' -e 'error' --ignore-case && grep -nw '/var/log/messages' -e 'error' --ignore-case\")\n-    warnings = Run(\"grep -nw '/var/log/syslog' -e 'warning' --ignore-case && grep -nw '/var/log/messages' -e 'warning' --ignore-case\")\n-    failures = Run(\"grep -nw '/var/log/syslog' -e 'fail' --ignore-case && grep -nw '/var/log/messages' -e 'fail' --ignore-case\")\n+    errors = Run(\"grep -nw '/var/log/syslog' -e 'error' --ignore-case --no-message && grep /var/log/messages -e error --ignore-case --no-message\")\n+    warnings = Run(\"grep -nw '/var/log/syslog' -e 'warning' --ignore-case --no-message && grep /var/log/messages -e warning --ignore-case --no-message\")\n+    failures = Run(\"grep -nw '/var/log/syslog' -e 'fail' --ignore-case --no-message && grep /var/log/messages -e fail --ignore-case --no-message\")\n     if (not errors and not warnings and not failures):\n         RunLog.info('Could not find ERROR/WARNING/FAILURE messages in syslog/messages log file.')\n         ResultLog.info('PASS')\n", "issue": "VERIFY-BOOT-ERROR-WARNINGS.py: fix test case\nTest case is not running properly on redhat. Run the script directly, not through lisav2 to observe this better.\r\n\r\nRelease: 7.7 Snapshot 5 (most likely 7.6 should also have this behavior)\r\n\r\nIssues to be fixed:\r\n- ignore if syslog is not present (that exists only on ubuntu/debian).\r\n[root@rhel77gen2 Linux]# python VERIFY-BOOT-ERROR-WARNINGS.py\r\n2.7.5 (default, Jun 11 2019, 14:33:56)\r\n[GCC 4.8.5 20150623 (Red Hat 4.8.5-39)]\r\ngrep: /var/log/syslog: No such file or directory\r\n\r\n- fix grep search\r\n[root@rhel77gen2 Linux]#  grep -nw '/var/log/messages' -e 'mlx5'\r\n[root@rhel77gen2 Linux]# grep /var/log/messages -e mlx5\r\nJul 29 10:02:27 rhel77gen2 kernel: mlx5_core ae35:00:02.0: firmware version: 14.23.1020\r\n\n", "before_files": [{"content": "#!/usr/bin/python\n# Copyright (c) Microsoft Corporation. All rights reserved.\n# Licensed under the Apache License.\nfrom azuremodules import *\n\nwhite_list_xml = \"ignorable-boot-errors.xml\"\n\n\ndef RunTest():\n    UpdateState(\"TestRunning\")\n    RunLog.info(\"Checking for ERROR and WARNING messages in system logs.\")\n    errors = Run(\"grep -nw '/var/log/syslog' -e 'error' --ignore-case && grep -nw '/var/log/messages' -e 'error' --ignore-case\")\n    warnings = Run(\"grep -nw '/var/log/syslog' -e 'warning' --ignore-case && grep -nw '/var/log/messages' -e 'warning' --ignore-case\")\n    failures = Run(\"grep -nw '/var/log/syslog' -e 'fail' --ignore-case && grep -nw '/var/log/messages' -e 'fail' --ignore-case\")\n    if (not errors and not warnings and not failures):\n        RunLog.info('Could not find ERROR/WARNING/FAILURE messages in syslog/messages log file.')\n        ResultLog.info('PASS')\n    else:\n        if white_list_xml and os.path.isfile(white_list_xml):\n            try:\n                import xml.etree.cElementTree as ET\n            except ImportError:\n                import xml.etree.ElementTree as ET\n\n            white_list_file = ET.parse(white_list_xml)\n            xml_root = white_list_file.getroot()\n\n            RunLog.info('Checking ignorable boot ERROR/WARNING/FAILURE messages...')\n            for node in xml_root:\n                if (failures and node.tag == \"failures\"):\n                    failures = RemoveIgnorableMessages(failures, node)\n                if (errors and node.tag == \"errors\"):\n                    errors = RemoveIgnorableMessages(errors, node)\n                if (warnings and node.tag == \"warnings\"):\n                    warnings = RemoveIgnorableMessages(warnings, node)\n\n        if (errors or warnings or failures):\n            RunLog.error('Found ERROR/WARNING/FAILURE messages in logs.')\n            if(errors):\n                SplitLog('Errors', errors)\n            if(warnings):\n                SplitLog('warnings', warnings)\n            if(failures):\n                SplitLog('failures', failures)\n            ResultLog.error('FAIL')\n        else:\n            ResultLog.info('PASS')\n    UpdateState(\"TestCompleted\")\n\n\ndef SplitLog(logType, logValues):\n    for logEntry in logValues:\n        RunLog.info(logType + ': ' + logEntry)\n\n\ndef RemoveIgnorableMessages(messages, keywords_xml_node):\n    message_list = messages.strip().split('\\n')\n    valid_list = []\n    for msg in message_list:\n        for keywords in keywords_xml_node:\n            if keywords.text in msg:\n                RunLog.info('Ignorable ERROR/WARNING/FAILURE message: ' + msg)\n                break\n        else:\n            valid_list.append(msg)\n    if len(valid_list) > 0:\n        return valid_list\n    else:\n        return None\n\nRunTest()\n", "path": "Testscripts/Linux/VERIFY-BOOT-ERROR-WARNINGS.py"}]}