1 files changed, 55 insertions, 0 deletions
diff --git a/tests/sources/previous_source_access.py b/tests/sources/previous_source_access.py
new file mode 100644
index 000000000..a04283257
--- /dev/null
+++ b/tests/sources/previous_source_access.py
@@ -0,0 +1,55 @@
+import os
+import pytest
+
+from buildstream import _yaml
+from tests.testutils import cli
+
+DATA_DIR = os.path.join(
+    os.path.dirname(os.path.realpath(__file__)),
+    'previous_source_access'
+)
+
+
+##################################################################
+#                              Tests                             #
+##################################################################
+# Test that plugins can access data from previous sources
+@pytest.mark.datafiles(DATA_DIR)
+def test_custom_transform_source(cli, tmpdir, datafiles):
+    project = os.path.join(datafiles.dirname, datafiles.basename)
+
+    # Set the project_dir alias in project.conf to the path to the tested project
+    project_config_path = os.path.join(project, "project.conf")
+    project_config = _yaml.load(project_config_path)
+    aliases = _yaml.node_get(project_config, dict, "aliases")
+    aliases["project_dir"] = "file://{}".format(project)
+    _yaml.dump(_yaml.node_sanitize(project_config), project_config_path)
+
+    # Ensure we can track
+    result = cli.run(project=project, args=[
+        'track', 'target.bst'
+    ])
+    result.assert_success()
+
+    # Ensure we can fetch
+    result = cli.run(project=project, args=[
+        'fetch', 'target.bst'
+    ])
+    result.assert_success()
+
+    # Ensure we get correct output from foo_transform
+    result = cli.run(project=project, args=[
+        'build', 'target.bst'
+    ])
+    destpath = os.path.join(cli.directory, 'checkout')
+    result = cli.run(project=project, args=[
+        'checkout', 'target.bst', destpath
+    ])
+    result.assert_success()
+    # Assert that files from both sources exist, and that they have
+    # the same content
+    assert os.path.exists(os.path.join(destpath, 'file'))
+    assert os.path.exists(os.path.join(destpath, 'filetransform'))
+    with open(os.path.join(destpath, 'file')) as file1:
+        with open(os.path.join(destpath, 'filetransform')) as file2:
+            assert file1.read() == file2.read()