added unit test to check for clang-tidy changes

Utilities/ReleaseScripts/test/BuildFile.xml

@@ -1,4 +1,7 @@
 <test name="TestSCRAM" command="run.sh"/>
+<test name="test-clang-tidy" command="test-clang-tidy.sh">
+  <use name="llvm"/>
+</test>
 <test name="TestValgrind" command="test-valgrind.sh">
   <flags PRE_TEST="test-valgrind-memleak"/>
   <use name="valgrind"/>

Utilities/ReleaseScripts/test/test-clang-tidy.cc

@@ -0,0 +1,31 @@
+class BaseClass {
+public:
+  BaseClass(int x) {
+    m_x = x;
+    ch = 0;
+  };
+  virtual ~BaseClass();
+  virtual int someMethod();
+
+protected:
+  int m_x;
+  char* ch;
+};
+
+BaseClass::~BaseClass() {
+  if (ch != 0) {
+    delete ch;
+    ch = 0;
+  }
+}
+int BaseClass::someMethod() { return m_x; }
+
+class DrivedClass : public BaseClass {
+public:
+  DrivedClass(int x) : BaseClass(x){};
+  virtual ~DrivedClass();
+  virtual int someMethod();
+};
+
+DrivedClass::~DrivedClass() {}
+int DrivedClass::someMethod() { return m_x * 2; }

Utilities/ReleaseScripts/test/test-clang-tidy.cc.yaml

@@ -0,0 +1,62 @@
+---
+MainSourceFile:  'Utilities/ReleaseScripts/test/test-clang-tidy.cc'
+Diagnostics:
+  - DiagnosticName:  modernize-use-nullptr
+    DiagnosticMessage:
+      Message:         use nullptr
+      FilePath:        'Utilities/ReleaseScripts/test/test-clang-tidy.cc'
+      FileOffset:      69
+      Replacements:
+        - FilePath:        'Utilities/ReleaseScripts/test/test-clang-tidy.cc'
+          Offset:          69
+          Length:          1
+          ReplacementText: nullptr
+  - DiagnosticName:  modernize-use-nullptr
+    DiagnosticMessage:
+      Message:         use nullptr
+      FilePath:        'Utilities/ReleaseScripts/test/test-clang-tidy.cc'
+      FileOffset:      206
+      Replacements:
+        - FilePath:        'Utilities/ReleaseScripts/test/test-clang-tidy.cc'
+          Offset:          206
+          Length:          1
+          ReplacementText: nullptr
+  - DiagnosticName:  modernize-use-nullptr
+    DiagnosticMessage:
+      Message:         use nullptr
+      FilePath:        'Utilities/ReleaseScripts/test/test-clang-tidy.cc'
+      FileOffset:      235
+      Replacements:
+        - FilePath:        'Utilities/ReleaseScripts/test/test-clang-tidy.cc'
+          Offset:          235
+          Length:          1
+          ReplacementText: nullptr
+  - DiagnosticName:  modernize-use-override
+    DiagnosticMessage:
+      Message:         'prefer using ''override'' or (rarely) ''final'' instead of ''virtual'''
+      FilePath:        'Utilities/ReleaseScripts/test/test-clang-tidy.cc'
+      FileOffset:      385
+      Replacements:
+        - FilePath:        'Utilities/ReleaseScripts/test/test-clang-tidy.cc'
+          Offset:          377
+          Length:          8
+          ReplacementText: ''
+        - FilePath:        'Utilities/ReleaseScripts/test/test-clang-tidy.cc'
+          Offset:          399
+          Length:          0
+          ReplacementText: ' override'
+  - DiagnosticName:  modernize-use-override
+    DiagnosticMessage:
+      Message:         'prefer using ''override'' or (rarely) ''final'' instead of ''virtual'''
+      FilePath:        'Utilities/ReleaseScripts/test/test-clang-tidy.cc'
+      FileOffset:      415
+      Replacements:
+        - FilePath:        'Utilities/ReleaseScripts/test/test-clang-tidy.cc'
+          Offset:          403
+          Length:          8
+          ReplacementText: ''
+        - FilePath:        'Utilities/ReleaseScripts/test/test-clang-tidy.cc'
+          Offset:          427
+          Length:          0
+          ReplacementText: ' override'
+...

Utilities/ReleaseScripts/test/test-clang-tidy.sh

@@ -0,0 +1,5 @@
+#!/bin/bash -ex
+clang-tidy -export-fixes $CMSSW_BASE/test-clang-tidy.cc.yaml -header-filter "$CMSSW_BASE/src/.*" $CMSSW_BASE/src/Utilities/ReleaseScripts/test/test-clang-tidy.cc
+sed -i -e "s|$CMSSW_BASE/src/||" $CMSSW_BASE/test-clang-tidy.cc.yaml
+diff -u $CMSSW_BASE/test-clang-tidy.cc.yaml $CMSSW_BASE/src/Utilities/ReleaseScripts/test/test-clang-tidy.cc.yaml
+rm -f $CMSSW_BASE/test-clang-tidy.cc.yaml