Refactor TestCase files into python modules

Convert all TestCase files into standard python modules to be run and
discovered by unittest.

tests/vcs.TestCase

@@ -1,104 +0,0 @@
-#!/usr/bin/env python3
-
-# http://www.drdobbs.com/testing/unit-testing-with-python/240165163
-
-import inspect
-import logging
-import os
-import sys
-import unittest
-
-from git import Repo
-
-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
-import fdroidserver.metadata
-import fdroidserver.scanner
-from testcommon import mkdtemp, parse_args_for_test
-
-
-class VCSTest(unittest.TestCase):
-    """For some reason the VCS classes are in fdroidserver/common.py"""
-
-    def setUp(self):
-        logging.basicConfig(level=logging.DEBUG)
-        self.basedir = os.path.join(localmodule, 'tests')
-        os.chdir(self.basedir)
-        self._td = mkdtemp()
-        self.testdir = self._td.name
-
-    def tearDown(self):
-        self._td.cleanup()
-        os.chdir(self.basedir)
-
-    def test_remote_set_head_can_fail(self):
-        os.chdir(self.testdir)
-        # First create an upstream repo with one commit
-        upstream_repo = Repo.init("upstream_repo")
-        with open(upstream_repo.working_dir + "/file", 'w') as f:
-            f.write("Hello World!")
-        upstream_repo.index.add([upstream_repo.working_dir + "/file"])
-        upstream_repo.index.commit("initial commit")
-        commitid = upstream_repo.head.commit.hexsha
-
-        # Now clone it once manually, like gitlab runner gitlab-runner sets up a repo during CI
-        clone1 = Repo.init("clone1")
-        clone1.create_remote("upstream", "file://" + upstream_repo.working_dir)
-        clone1.remote("upstream").fetch()
-        clone1.head.reference = clone1.commit(commitid)
-        clone1.head.reset(index=True, working_tree=True)
-        self.assertTrue(clone1.head.is_detached)
-
-        # and now we want to use this clone as a source repo for fdroid build
-        config = {}
-        os.mkdir("build")
-        config['sdk_path'] = 'MOCKPATH'
-        config['ndk_paths'] = {'r10d': os.getenv('ANDROID_NDK_HOME')}
-        config['java_paths'] = {'fake': 'fake'}
-        fdroidserver.common.config = config
-        app = fdroidserver.metadata.App()
-        app.RepoType = 'git'
-        app.Repo = clone1.working_dir
-        app.id = 'com.gpl.rpg.AndorsTrail'
-        build = fdroidserver.metadata.Build()
-        build.commit = commitid
-        build.androidupdate = ['no']
-        vcs, build_dir = fdroidserver.common.setup_vcs(app)
-        # force an init of the repo, the remote head error only occurs on the second gotorevision call
-        vcs.gotorevision(build.commit)
-        fdroidserver.common.prepare_source(
-            vcs,
-            app,
-            build,
-            build_dir=build_dir,
-            srclib_dir="ignore",
-            extlib_dir="ignore",
-        )
-        self.assertTrue(os.path.isfile("build/com.gpl.rpg.AndorsTrail/file"))
-
-
-if __name__ == "__main__":
-    os.chdir(os.path.dirname(__file__))
-
-    import argparse
-
-    parser = argparse.ArgumentParser()
-    parser.add_argument(
-        "-v",
-        "--verbose",
-        action="store_true",
-        default=False,
-        help="Spew out even more information than normal",
-    )
-    parse_args_for_test(parser, sys.argv)
-
-    newSuite = unittest.TestSuite()
-    newSuite.addTest(unittest.makeSuite(VCSTest))
-    unittest.main(failfast=False)