added `-Werror` to pytest calls and fixed reported warnings (#5483)

.github/workflows/CI-unixish.yml

@@ -366,11 +366,11 @@ jobs:
       - name: Run test/cli
         run: |
           cd test/cli
-          python3 -m pytest --strict -vv test-*.py
+          python3 -m pytest -Werror --strict-markers -vv test-*.py
           cd ../../..
           ln -s cppcheck 'cpp check'
           cd 'cpp check/test/cli'
-          python3 -m pytest --strict -vv test-*.py
+          python3 -m pytest -Werror --strict-markers -vv test-*.py
 
       - name: Run cfg tests
         if: matrix.os != 'ubuntu-22.04'

.github/workflows/CI-windows.yml

@@ -168,13 +168,13 @@ jobs:
           copy .\bin\cppcheck.exe .\cppcheck.exe || exit /b !errorlevel!
           copy .\bin\cppcheck-core.dll .\cppcheck-core.dll || exit /b !errorlevel!
           cd test/cli || exit /b !errorlevel!
-          :: python -m pytest --strict -vv --suppress-no-test-exit-code test-clang-import.py || exit /b !errorlevel!
-          python -m pytest --strict -vv test-helloworld.py || exit /b !errorlevel!
-          python -m pytest --strict -vv test-inline-suppress.py || exit /b !errorlevel!
-          python -m pytest --strict -vv test-more-projects.py || exit /b !errorlevel!
-          python -m pytest --strict -vv test-other.py || exit /b !errorlevel!
-          python -m pytest --strict -vv test-proj2.py || exit /b !errorlevel!
-          python -m pytest --strict -vv test-suppress-syntaxError.py || exit /b !errorlevel!
+          :: python -m pytest -Werror --strict-markers -vv --suppress-no-test-exit-code test-clang-import.py || exit /b !errorlevel!
+          python -m pytest -Werror --strict-markers -vv test-helloworld.py || exit /b !errorlevel!
+          python -m pytest -Werror --strict-markers -vv test-inline-suppress.py || exit /b !errorlevel!
+          python -m pytest -Werror --strict-markers -vv test-more-projects.py || exit /b !errorlevel!
+          python -m pytest -Werror --strict-markers -vv test-other.py || exit /b !errorlevel!
+          python -m pytest -Werror --strict-markers -vv test-proj2.py || exit /b !errorlevel!
+          python -m pytest -Werror --strict-markers -vv test-suppress-syntaxError.py || exit /b !errorlevel!
 
       - name: Test addons
         if: matrix.config == 'release'

.github/workflows/scriptcheck.yml

@@ -135,9 +135,18 @@ jobs:
         run: |
           python tools/test_matchcompiler.py
 
+      # we cannot specify -Werror since xml/etree/ElementTree.py in Python 3.9/3.10 contains an unclosed file
       - name: test addons
+        if: matrix.python-version == '3.9' || matrix.python-version == '3.10'
         run: |
-          python -m pytest --strict -vv addons/test/test-*.py
+          python -m pytest --strict-markers -vv addons/test/test-*.py
+        env:
+          PYTHONPATH: ./addons
+
+      - name: test addons
+        if: matrix.python-version != '3.9' && matrix.python-version != '3.10'
+        run: |
+          python -m pytest -Werror --strict-markers -vv addons/test/test-*.py
         env:
           PYTHONPATH: ./addons
 
@@ -149,21 +158,21 @@ jobs:
 
       - name: test reduce
         run: |
-          python -m pytest --strict -vv tools/test_reduce.py
+          python -m pytest -Werror --strict-markers -vv tools/test_reduce.py
         env:
           PYTHONPATH: ./tools
 
       - name: test donate_cpu_lib
         if: matrix.python-version != '2.7'
         run: |
-          python -m pytest --strict -vv tools/test_donate_cpu_lib.py
+          python -m pytest -Werror --strict-markers -vv tools/test_donate_cpu_lib.py
         env:
           PYTHONPATH: ./tools
 
       - name: test donate_cpu_server
         if: matrix.python-version != '2.7'
         run: |
-          python -m pytest --strict -vv tools/test_donate_cpu_server.py
+          python -m pytest -Werror --strict-markers -vv tools/test_donate_cpu_server.py
         env:
           PYTHONPATH: ./tools
 

addons/misra.py

@@ -1106,11 +1106,12 @@ def getAddonRules():
     """Returns dict of MISRA rules handled by this addon."""
     addon_rules = []
     compiled = re.compile(r'.*def[ ]+misra_([0-9]+)_([0-9]+)[(].*')
-    for line in open(__file__):
-        res = compiled.match(line)
-        if res is None:
-            continue
-        addon_rules.append(res.group(1) + '.' + res.group(2))
+    with open(__file__) as f:
+        for line in f:
+            res = compiled.match(line)
+            if res is None:
+                continue
+            addon_rules.append(res.group(1) + '.' + res.group(2))
     return addon_rules
 
 
@@ -4155,6 +4156,7 @@ class MisraChecker:
                 file_stream.readlines()
                 file_stream.seek(0)
             except UnicodeDecodeError:
+                file_stream.close()
                 file_stream = None
             else:
                 break
@@ -4234,6 +4236,8 @@ class MisraChecker:
                 self.ruleTexts[rule.num] = rule
                 expect_more = True
 
+        file_stream.close()
+
     def verifyRuleTexts(self):
         """Prints rule numbers without rule text."""
         rule_texts_rules = []

addons/test/util.py

@@ -25,11 +25,13 @@ def dump_create(fpath, *argv):
     p.communicate()
     if p.returncode != 0:
         raise OSError("cppcheck returns error code: %d" % p.returncode)
-    subprocess.Popen(["sync"])
+    p = subprocess.Popen(["sync"])
+    p.communicate()
 
 
 def dump_remove(fpath):
-    subprocess.Popen(["rm", "-f", fpath + ".dump"])
+    p = subprocess.Popen(["rm", "-f", fpath + ".dump"])
+    p.communicate()
 
 
 def convert_json_output(raw_json_strings):