tests: add test for duplicate headers

Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

tests/CMakeLists.txt

@@ -9,6 +9,11 @@ if (PYTHON_DEFAULT_AVAILABLE)
     add_test (NAME check_file_encoding COMMAND ${PYTHON_DEFAULT_EXECUTABLE}
         ${CMAKE_CURRENT_SOURCE_DIR}/check_file_encoding.py
         WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/src)
+
+    # Check for duplicate headers
+    add_test (NAME check_duplicate_headers COMMAND ${PYTHON_DEFAULT_EXECUTABLE}
+        ${CMAKE_CURRENT_SOURCE_DIR}/check_duplicate_headers.py
+        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})
 endif (PYTHON_DEFAULT_AVAILABLE)
 
 # Add some java tests

tests/check_duplicate_headers.py

@@ -0,0 +1,27 @@
+#!/usr/bin/python
+
+import unittest
+import os
+
+class DuplicateHeadersTests(unittest.TestCase):
+    '''Checks for duplicate header names. Since all sensor headers get
+      installed as part of the API, duplicate headers can cause bad linking,
+      namespace class collisions and so on.'''
+
+    def test_duplicate_headers(self):
+        # Keep a list of all the header files in library
+        header_files = []
+
+        # Recusively search cwd for headers and add them to the list
+        for root, dirs, files in os.walk(os.curdir):
+            for file in files:
+                if file.endswith(('.h', '.hpp', '.hxx')):
+                    header_files.append(file)
+
+        # Test for duplicates
+        duplicates = len(header_files) - len(set(header_files))
+        self.assertEqual(duplicates, 0,
+                "\nDuplicate headers: %d\n" % duplicates)
+
+if __name__ == '__main__':
+    unittest.main()