tests: test local plugins and element-path paths

tests/loader/project.py

+import os
+import pytest
+
+from buildstream._exceptions import LoadError, LoadErrorReason
+from buildstream._context import Context
+from buildstream._project import Project
+from tests.testutils import filetypegenerator
+
+DATA_DIR = os.path.join(
+    os.path.dirname(os.path.realpath(__file__)),
+    'project',
+)
+
+
+@pytest.mark.datafiles(os.path.join(DATA_DIR, 'missing-element-path'))
+def test_missing_element_path_directory(datafiles):
+    project = os.path.join(datafiles.dirname, datafiles.basename)
+
+    context = Context()
+
+    with pytest.raises(LoadError) as exc:
+        project = Project(project, context)
+
+    assert (exc.value.reason == LoadErrorReason.MISSING_FILE)
+
+
+@pytest.mark.datafiles(os.path.join(DATA_DIR, 'missing-element-path'))
+def test_invalid_element_path_directory(datafiles):
+    project = os.path.join(datafiles.dirname, datafiles.basename)
+
+    context = Context()
+
+    path = os.path.join(project, 'elements')
+
+    for file_type in filetypegenerator.generate_file_types(path):
+
+        if not os.path.isdir(path):
+            with pytest.raises(LoadError) as exc:
+                project = Project(project, context)
+
+            assert (exc.value.reason == LoadErrorReason.INVALID_DATA)
+
+
+@pytest.mark.datafiles(os.path.join(DATA_DIR, 'local-plugin'))
+def test_missing_local_plugin_directory(datafiles):
+    project = os.path.join(datafiles.dirname, datafiles.basename)
+
+    context = Context()
+
+    with pytest.raises(LoadError) as exc:
+        project = Project(project, context)
+
+    assert (exc.value.reason == LoadErrorReason.MISSING_FILE)
+
+
+@pytest.mark.datafiles(os.path.join(DATA_DIR, 'local-plugin'))
+def test_invalid_local_plugin_directory(datafiles):
+    project = os.path.join(datafiles.dirname, datafiles.basename)
+
+    context = Context()
+
+    path = os.path.join(project, 'plugins')
+
+    for file_type in filetypegenerator.generate_file_types(path):
+
+        if not os.path.isdir(path):
+            with pytest.raises(LoadError) as exc:
+                project = Project(project, context)
+
+            assert (exc.value.reason == LoadErrorReason.INVALID_DATA)

tests/loader/project/local-plugin/project.conf

+name: foo
+plugins:
+- origin: local
+  path: plugins
+  sources:
+    mysource: 0

tests/loader/project/missing-element-path/project.conf

+name: foo
+element-path: elements