test: Add verify-flatbuffer test

This runs update_fbs.py --verify as a unit test, and fail accordingly.
The test passes if git executable is not found or the schema files are
not within a git repo, because both are not a dependency of UHD.

2 files changed, 34 insertions, 0 deletions

diff --git a/host/tests/CMakeLists.txt b/host/tests/CMakeLists.txt
index 44888c153..8c8a1cbc3 100644
--- a/host/tests/CMakeLists.txt
+++ b/host/tests/CMakeLists.txt
@@ -68,6 +68,7 @@ set(test_sources
 # only differ in the cpp/py file extension). If in doubt, prepend 'py'
 set(pytest_sources
     pyranges_test.py
+    verify_fbs_test.py
 )
 
 #turn each test cpp file into an executable with an int main() function
diff --git a/host/tests/verify_fbs_test.py b/host/tests/verify_fbs_test.py
new file mode 100644
index 000000000..c3ee763e4
--- /dev/null
+++ b/host/tests/verify_fbs_test.py
@@ -0,0 +1,33 @@
+#
+# Copyright 2020 Ettus Research, a National Instruments Brand
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+"""
+Unit test for uhd.types.*Range
+"""
+
+import os
+import sys
+import unittest
+import importlib
+import pathlib
+
+class VerifyFBSTest(unittest.TestCase):
+    """ Test Python-wrapped ranges classes """
+    def test_flatbuffer_files(self):
+        """ Check FBS file """
+        utils_path = os.path.normpath(os.path.join(
+            pathlib.Path(__file__).parent.absolute(),
+            '..', 'utils', 'update_fbs.py'))
+        print(utils_path)
+        spec = importlib.util.spec_from_file_location("update_fbs", utils_path)
+        update_fbs = importlib.util.module_from_spec(spec)
+        spec.loader.exec_module(update_fbs)
+        try:
+            git_exe = update_fbs.find_executable("git")
+        except RuntimeError:
+            # No git, no test. We pass b/c git is not a UHD dependency.
+            return
+        sys.argv.append('--verify')
+        self.assertTrue(update_fbs.verify(git_exe))