test new common.regsub_file() method that replaces sed calls

tests/build.TestCase

@@ -0,0 +1,65 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+# http://www.drdobbs.com/testing/unit-testing-with-python/240165163
+
+import inspect
+import optparse
+import os
+import re
+import sys
+import unittest
+
+localmodule = os.path.realpath(
+    os.path.join(os.path.dirname(inspect.getfile(inspect.currentframe())), '..'))
+print('localmodule: ' + localmodule)
+if localmodule not in sys.path:
+    sys.path.insert(0, localmodule)
+
+import fdroidserver.build
+import fdroidserver.common
+
+
+class BuildTest(unittest.TestCase):
+    '''fdroidserver/build.py'''
+
+    def _set_build_tools(self):
+        build_tools = os.path.join(fdroidserver.common.config['sdk_path'], 'build-tools')
+        if os.path.exists(build_tools):
+            fdroidserver.common.config['build_tools'] = ''
+            for f in sorted(os.listdir(build_tools), reverse=True):
+                versioned = os.path.join(build_tools, f)
+                if os.path.isdir(versioned) \
+                        and os.path.isfile(os.path.join(versioned, 'aapt')):
+                    fdroidserver.common.config['build_tools'] = versioned
+                    break
+            return True
+        else:
+            print 'no build-tools found: ' + build_tools
+            return False
+
+    def _find_all(self):
+        for cmd in ('aapt', 'adb', 'android', 'zipalign'):
+            path = fdroidserver.common.find_sdk_tools_cmd(cmd)
+            if path is not None:
+                self.assertTrue(os.path.exists(path))
+                self.assertTrue(os.path.isfile(path))
+
+    def test_adapt_gradle(self):
+        teststring = 'FAKE_VERSION_FOR_TESTING'
+        fdroidserver.build.config = {}
+        fdroidserver.build.config['build_tools'] = teststring
+        fdroidserver.build.adapt_gradle(os.path.dirname(__file__))
+        filedata = open(os.path.join(os.path.dirname(__file__), 'build.gradle')).read()
+        self.assertIsNotNone(re.search("\s+buildToolsVersion '%s'\s+" % teststring, filedata))
+
+
+if __name__ == "__main__":
+    parser = optparse.OptionParser()
+    parser.add_option("-v", "--verbose", action="store_true", default=False,
+                      help="Spew out even more information than normal")
+    (fdroidserver.common.options, args) = parser.parse_args(['--verbose'])
+
+    newSuite = unittest.TestSuite()
+    newSuite.addTest(unittest.makeSuite(BuildTest))
+    unittest.main()