test: Add test for the plugin loader

Fix #8

testsuite/meson.build

@@ -3,6 +3,7 @@ runtests = files('runtests.py')
 tests = [
     ['Test gst', 'test_gst.py'],
     ['Test fundamentals', 'test_types.py'],
+    ['Test plugins', 'test_plugin.py'],
 ]
 
 pluginsdirs = []
@@ -25,10 +26,23 @@ if runcmd.returncode() != 0
     error('Could not configure testsuite config file.' + runcmd.stderr())
 endif
 
+pluginsdirs = []
+if gst_dep.type_name() == 'pkgconfig'
+  pbase = dependency('gstreamer-plugins-base-' + api_version, required : false)
+  pluginsdirs = [gst_dep.get_pkgconfig_variable('pluginsdir'),
+                 pbase.get_pkgconfig_variable('pluginsdir')]
+endif
+
+pypluginsdir = [join_paths (meson.build_root(), 'plugin'), meson.current_source_dir()]
+
 foreach i: tests
     test_name = i.get(0)
     env = environment()
     env.set('GST_OVERRIDE_SRC_PATH', join_paths (meson.current_source_dir(), '..', 'gi', 'overrides'))
     env.set('GST_OVERRIDE_BUILD_PATH', join_paths (meson.current_build_dir(), '..', 'gi', 'overrides'))
+    env.set('GST_PLUGIN_LOADING_WHITELIST', 'gstreamer',
+        'gst-plugins-base@' + meson.build_root(), 'gst-python@' + meson.build_root())
+    env.set('GST_PLUGIN_PATH_1_0', meson.build_root(), pluginsdirs + pypluginsdir)
+    env.set('GST_REGISTRY', join_paths(meson.current_build_dir(), '@0@.registry'.format(test_name)))
     test(test_name, python, args: [runtests, i.get(1)], env: env)
 endforeach

testsuite/python/identity.py

@@ -0,0 +1,46 @@
+#!/usr/bin/env python
+# -*- Mode: Python -*-
+# vi:si:et:sw=4:sts=4:ts=4
+
+# identity.py
+# 2016 Marianna S. Buschle <msb@qtec.com>
+#
+# Simple identity element in python
+#
+# You can run the example from the source doing from gst-python/:
+#
+#  $ export GST_PLUGIN_PATH=$GST_PLUGIN_PATH:$PWD/plugin:$PWD/examples/plugins
+#  $ GST_DEBUG=python:4 gst-launch-1.0 fakesrc num-buffers=10 ! identity_py ! fakesink
+
+import gi
+gi.require_version('Gst', '1.0')
+gi.require_version('GstBase', '1.0')
+
+from gi.repository import Gst, GObject, GstBase
+Gst.init(None)
+
+#
+# Simple Identity element created entirely in python
+#
+class Identity(GstBase.BaseTransform):
+    __gstmetadata__ = ('Identity Python','Transform', \
+                      'Simple identity element written in python', 'Marianna S. Buschle')
+
+    __gsttemplates__ = (Gst.PadTemplate.new("src",
+                                           Gst.PadDirection.SRC,
+                                           Gst.PadPresence.ALWAYS,
+                                           Gst.Caps.new_any()),
+                       Gst.PadTemplate.new("sink",
+                                           Gst.PadDirection.SINK,
+                                           Gst.PadPresence.ALWAYS,
+                                           Gst.Caps.new_any()))
+
+    def __init__(self):
+        self.transformed = False
+
+    def do_transform_ip(self, buffer):
+        self.transformed = True
+        return Gst.FlowReturn.OK
+
+GObject.type_register(Identity)
+__gstelementfactory__ = ("test_identity_py", Gst.Rank.NONE, Identity)

testsuite/test_plugin.py

@@ -0,0 +1,42 @@
+# -*- Mode: Python -*-
+# vi:si:et:sw=4:sts=4:ts=4
+#
+# gst-python - Python bindings for GStreamer
+# Copyright (C) 2007 Johan Dahlin
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
+
+import overrides_hack
+overrides_hack
+
+from common import TestCase, unittest
+
+import gi
+gi.require_version("Gst", "1.0")
+from gi.repository import Gst
+
+
+class TestPlugin(TestCase):
+    def testLoad(self):
+        Gst.init(None)
+        p = Gst.parse_launch ("fakesrc ! test_identity_py name=id ! fakesink")
+        assert p.get_by_name("id").transformed == False
+        p.set_state(Gst.State.PLAYING)
+        p.get_state(Gst.CLOCK_TIME_NONE)
+        p.set_state(Gst.State.NULL)
+        assert p.get_by_name("id").transformed == True
+
+if __name__ == "__main__":
+    unittest.main()