[gobject-introspection] scanner test: Cross-platform identifier filter

[Emmanuele Bassi <ebassi src gnome org>]

commit 55b99a36cbb9a8cb344f0ebb4b4faaef036d6b3b
Author: Philip Chimento <philip chimento gmail com>
Date:   Wed Dec 2 20:27:05 2015 -0800

    scanner test: Cross-platform identifier filter
    
    The sed filter in this test used \U which is GNU sed only. In order to be
    able to run the tests on OS X, which doesn't have GNU sed by default, we
    reimplement the same filter in Python.
    
    See #139.

 tests/scanner/test_transformer.py | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)
---
diff --git a/tests/scanner/test_transformer.py b/tests/scanner/test_transformer.py
index 175a8d37..8c41fc58 100644
--- a/tests/scanner/test_transformer.py
+++ b/tests/scanner/test_transformer.py
@@ -7,6 +7,7 @@ import unittest
 import tempfile
 import os
 import sys
+import textwrap
 
 if sys.version_info.major < 3:
     import __builtin__ as builtins
@@ -46,12 +47,17 @@ def load_namespace_from_source_string(namespace, source):
 
 
 class TestIdentifierFilter(unittest.TestCase):
-    def test_underscore_t_sed_filter(self):
-        cmd = r"sed " \
-              r"-e 's/^test_t$/TestContext/' " \
-              r"-e 's/\(.*\)_t$/\1/' " \
-              r"-e 's/^test_/Test_/' " \
-              r"-e 's/_\([a-z]\)/" + '\\u' + r"\1/g'"
+    def test_underscore_t_identifier_filter(self):
+        cmd = textwrap.dedent(r"""
+              python -c '
+              import sys, re
+              for line in sys.stdin:
+                  line = re.sub(r"^test_t$", "TestContext", line)
+                  line = re.sub(r"_t$", "", line)
+                  line = re.sub(r"^test_", "Test_", line)
+                  line = re.sub(r"_([a-z])", lambda m: m.group(1).title(),
+                                line)
+                  sys.stdout.write(line)'""")
 
         namespace = ast.Namespace('Test', '1.0')
         xformer = Transformer(namespace, identifier_filter_cmd=cmd)