Updated tests for pipelines

Author: coordt

test/fixtures/pipeline_dag_test.md

@@ -0,0 +1,9 @@
+# Changelog
+
+## Unreleased
+
+All this stuff should be removed
+
+## 0.0.1 (2022-01-01)
+
+This stuff stays.

test/fixtures/rendered_default_repo.md

@@ -0,0 +1,46 @@
+# Changelog
+
+## Unreleased (2022-01-06)
+
+### Updates
+
+- Chg: modified ``b`` xxx. [Alice](alice@example.com), [Charly](charly@example.com), [Juliet](juliet@example.com)    
+
+## 0.0.3 (2022-01-05)
+
+### New
+
+- New: add file ``e``, modified ``b``. [Bob](bob@example.com)    
+  This is a message body.
+
+  With multi-line content:
+  - one
+  - two
+
+  **bug:** #42
+
+  **change-id:** Ic8aaa0728a43936cd4c6e1ed590e01ba8f0fbf5b
+
+  **signed-off-by:** A. U. Thor <committer@example.com>
+
+  **cc:** R. E. Viewer <reviewer@example.com>
+
+  **subject:** This is a fake subject spanning to several lines
+as you can see
+
+
+- New: add file ``c``. [Charly](charly@example.com)    
+
+## 0.0.2 (2022-01-02)
+
+### New
+
+- Add ``b`` with non-ascii chars éèà⧵ and html chars ``&<``. [Alice](alice@example.com)    
+  **change-id:** Ic8aaa0728a43936cd4c6e1ed590e01ba8f0fbf5b
+
+
+## 0.0.1 (2022-01-01)
+
+### New
+
+- New: first commit. [Bob](bob@example.com)    

test/test_pipeline.py

@@ -1,7 +1,10 @@
 """Testing pipelines and actions."""
+from pathlib import Path
 
 from clgen import pipeline
 
+FIXTURES_DIR = Path(__file__).parent / "fixtures"
+
 
 def test_action_builtin():
     """Actions run correctly."""
@@ -37,3 +40,47 @@ def test_pipeline_factory():
     pipe = pipeline.pipeline_factory(actions)
     assert pipe.run("  this is a bad idea.   ") == "This is a bad idea."
     assert pipe.run() == "No commit message."
+
+
+def test_pipelline_dag():
+    """Make sure a typical DAG from YAML executes properly."""
+    changelog_path = FIXTURES_DIR / "pipeline_dag_test.md"
+    actions = [
+        {
+            "action": "AppendString",
+            "comment": "Append the changelog from the last release heading on to the generated changelog",
+            "kwargs": {
+                "postfix": [
+                    {
+                        "action": "ReadFile",
+                        "comment": "Read the existing changelog",
+                        "kwargs": {"filename": str(changelog_path)},
+                    },
+                    {
+                        "action": "Slice",
+                        "comment": "Return just part of the file",
+                        "kwargs": {
+                            "start": [
+                                {
+                                    "action": "ReadFile",
+                                    "comment": "Read the existing changelog",
+                                    "kwargs": {"filename": str(changelog_path)},
+                                },
+                                {
+                                    "action": "FirstRegExMatchPosition",
+                                    "comment": "Find the position of the last release heading",
+                                    "kwargs": {
+                                        "pattern": r"(?im)^## [0-9]+\.[0-9]+(?:\.[0-9]+)?\s+\([0-9]+-[0-9]{2}-[0-9]{2}\)$"
+                                    },
+                                },
+                            ]
+                        },
+                    },
+                ]
+            },
+        },
+    ]
+    pipe = pipeline.pipeline_factory(actions)
+    input_text = "This is new\n"
+    expected = input_text + "## 0.0.1 (2022-01-01)\n\nThis stuff stays.\n"
+    assert pipe.run(input_text) == expected