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[libclang][test] Suppress annoying 'LIBCLANG TOOLING ERROR' output 

check-all invokes check-clang-python which prints the annoying message:

LIBCLANG TOOLING ERROR: fixed-compilation-database: Error while opening fixed database: No such file or directory
json-compilation-database: Error while opening JSON database: No such file or directory

Let's fix it now with os.dup os.dup2 trick.

llvm-svn: 357562
This commit is contained in:
Fangrui Song 2019-04-03 07:25:04 +00:00
parent d9c24dca73
commit 2374bff376
1 changed files with 9 additions and 0 deletions
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9
clang/bindings/python/tests/cindex/test_cdb.py
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@ -23,8 +23,17 @@ class TestCDB(unittest.TestCase):
def test_create_fail(self): def test_create_fail(self):
"""Check we fail loading a database with an assertion""" """Check we fail loading a database with an assertion"""
path = os.path.dirname(__file__) path = os.path.dirname(__file__)
# clang_CompilationDatabase_fromDirectory calls fprintf(stderr, ...)
# Suppress its output.
stderr = os.dup(2)
with open(os.devnull, 'wb') as null:
os.dup2(null.fileno(), 2)
with self.assertRaises(CompilationDatabaseError) as cm: with self.assertRaises(CompilationDatabaseError) as cm:
cdb = CompilationDatabase.fromDirectory(path) cdb = CompilationDatabase.fromDirectory(path)
os.dup2(stderr, 2)
os.close(stderr)
e = cm.exception e = cm.exception
self.assertEqual(e.cdb_error, self.assertEqual(e.cdb_error,
CompilationDatabaseError.ERROR_CANNOTLOADDATABASE) CompilationDatabaseError.ERROR_CANNOTLOADDATABASE)