changed plugin filter to load presets from directory structure,

added tests

pype/tests/lib.py

@@ -0,0 +1,80 @@
+import os
+import sys
+import shutil
+import tempfile
+import contextlib
+
+import pyblish
+import pyblish.cli
+import pyblish.plugin
+from pyblish.vendor import six
+
+
+# Setup
+HOST = 'python'
+FAMILY = 'test.family'
+
+REGISTERED = pyblish.plugin.registered_paths()
+PACKAGEPATH = pyblish.lib.main_package_path()
+ENVIRONMENT = os.environ.get("PYBLISHPLUGINPATH", "")
+PLUGINPATH = os.path.join(PACKAGEPATH, '..', 'tests', 'plugins')
+
+
+def setup():
+    pyblish.plugin.deregister_all_paths()
+
+
+def setup_empty():
+    """Disable all plug-ins"""
+    setup()
+    pyblish.plugin.deregister_all_plugins()
+    pyblish.plugin.deregister_all_paths()
+    pyblish.plugin.deregister_all_hosts()
+    pyblish.plugin.deregister_all_callbacks()
+    pyblish.plugin.deregister_all_targets()
+    pyblish.api.deregister_all_discovery_filters()
+
+
+def teardown():
+    """Restore previously REGISTERED paths"""
+
+    pyblish.plugin.deregister_all_paths()
+    for path in REGISTERED:
+        pyblish.plugin.register_plugin_path(path)
+
+    os.environ["PYBLISHPLUGINPATH"] = ENVIRONMENT
+    pyblish.api.deregister_all_plugins()
+    pyblish.api.deregister_all_hosts()
+    pyblish.api.deregister_all_discovery_filters()
+    pyblish.api.deregister_test()
+    pyblish.api.__init__()
+
+
+@contextlib.contextmanager
+def captured_stdout():
+    """Temporarily reassign stdout to a local variable"""
+    try:
+        sys.stdout = six.StringIO()
+        yield sys.stdout
+    finally:
+        sys.stdout = sys.__stdout__
+
+
+@contextlib.contextmanager
+def captured_stderr():
+    """Temporarily reassign stderr to a local variable"""
+    try:
+        sys.stderr = six.StringIO()
+        yield sys.stderr
+    finally:
+        sys.stderr = sys.__stderr__
+
+
+@contextlib.contextmanager
+def tempdir():
+    """Provide path to temporary directory"""
+    try:
+        tempdir = tempfile.mkdtemp()
+        yield tempdir
+    finally:
+        shutil.rmtree(tempdir)

pype/tests/test_pyblish_filter.py

@@ -0,0 +1,41 @@
+from . import lib
+import pyblish.api
+import pyblish.util
+import pyblish.plugin
+from pype.lib import filter_pyblish_plugins
+import os
+
+
+def test_pyblish_plugin_filter(printer, monkeypatch):
+    """
+    Test if pyblish filter can filter and modify plugins on-the-fly.
+    """
+
+    lib.setup_empty()
+    monkeypatch.setitem(os.environ, 'PYBLISHPLUGINPATH', '')
+    plugins = pyblish.api.registered_plugins()
+    printer("Test if we have no registered plugins")
+    assert len(plugins) == 0
+    paths = pyblish.api.registered_paths()
+    printer("Test if we have no registered plugin paths")
+    print(paths)
+
+    class MyTestPlugin(pyblish.api.InstancePlugin):
+        my_test_property = 1
+        label = "Collect Renderable Camera(s)"
+        hosts = ["test"]
+        families = ["default"]
+
+    pyblish.api.register_host("test")
+    pyblish.api.register_plugin(MyTestPlugin)
+    pyblish.api.register_discovery_filter(filter_pyblish_plugins)
+    plugins = pyblish.api.discover()
+
+    printer("Test if only one plugin was discovered")
+    assert len(plugins) == 1
+    printer("Test if properties are modified correctly")
+    assert plugins[0].label == "loaded from preset"
+    assert plugins[0].families == ["changed", "by", "preset"]
+    assert plugins[0].optional is True
+
+    lib.teardown()