From 67e0ceb48dfdc5f4e7fe8fc54c360c82b609ee4d Mon Sep 17 00:00:00 2001
From: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
Date: Fri, 3 Feb 2017 21:26:42 -0800
Subject: [PATCH] tests: add test for duplicate headers

Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
---
 tests/CMakeLists.txt             |  5 +++++
 tests/check_duplicate_headers.py | 27 +++++++++++++++++++++++++++
 2 files changed, 32 insertions(+)
 create mode 100644 tests/check_duplicate_headers.py

diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 2a6f732c..ca7f6509 100644
--- a/tests/CMakeLists.txt
+++ b/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
diff --git a/tests/check_duplicate_headers.py b/tests/check_duplicate_headers.py
new file mode 100644
index 00000000..cd4e6e06
--- /dev/null
+++ b/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()