test: RED phase — manifest tests (T02)

tests/test_manifest.py: full test suite for FR-100 manifest model
(load, validate, missing sources, invalid feature_level/family, path
resolution). Tests fail — module not yet implemented.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/test_manifest.py

@@ -0,0 +1,129 @@
+"""Tests for manifest model (FR-100)."""
+
+from __future__ import annotations
+
+from pathlib import Path
+
+import pytest
+import yaml
+
+from markidocx.manifest import (
+    FeatureLevel,
+    Manifest,
+    ManifestError,
+    load_manifest,
+)
+
+
+@pytest.fixture
+def minimal_manifest_yaml(tmp_path: Path) -> Path:
+    src = tmp_path / "doc.md"
+    src.write_text("# Hello\n\nContent here.")
+    manifest = tmp_path / "manifest.yaml"
+    manifest.write_text(
+        yaml.dump(
+            {
+                "project": {"name": "Test Doc", "feature_level": "level1", "family": "article"},
+                "sources": [{"path": "doc.md"}],
+                "output": {"dir": "./dist"},
+            }
+        )
+    )
+    return manifest
+
+
+@pytest.fixture
+def multi_source_manifest(tmp_path: Path) -> Path:
+    for name in ("ch1.md", "ch2.md"):
+        (tmp_path / name).write_text(f"# {name}\n\nContent.")
+    manifest = tmp_path / "manifest.yaml"
+    manifest.write_text(
+        yaml.dump(
+            {
+                "project": {"name": "Book", "feature_level": "level1", "family": "book"},
+                "sources": [{"path": "ch1.md"}, {"path": "ch2.md"}],
+                "output": {"dir": "./dist"},
+                "metadata": {"title": "My Book", "author": "Author", "date": "2026-01-01"},
+            }
+        )
+    )
+    return manifest
+
+
+class TestLoadManifest:
+    def test_loads_minimal_manifest(self, minimal_manifest_yaml: Path) -> None:
+        m = load_manifest(minimal_manifest_yaml)
+        assert m.project.name == "Test Doc"
+        assert m.project.feature_level == FeatureLevel.LEVEL1
+        assert m.project.family == "article"
+        assert len(m.sources) == 1
+
+    def test_loads_multi_source(self, multi_source_manifest: Path) -> None:
+        m = load_manifest(multi_source_manifest)
+        assert len(m.sources) == 2
+        assert m.metadata["title"] == "My Book"
+
+    def test_missing_file_raises(self, tmp_path: Path) -> None:
+        manifest = tmp_path / "manifest.yaml"
+        manifest.write_text(
+            yaml.dump(
+                {
+                    "project": {"name": "X", "feature_level": "level1", "family": "article"},
+                    "sources": [{"path": "missing.md"}],
+                    "output": {"dir": "./dist"},
+                }
+            )
+        )
+        with pytest.raises(ManifestError, match="missing.md"):
+            load_manifest(manifest)
+
+    def test_missing_project_key_raises(self, tmp_path: Path) -> None:
+        manifest = tmp_path / "manifest.yaml"
+        manifest.write_text(yaml.dump({"sources": []}))
+        with pytest.raises(ManifestError, match="project"):
+            load_manifest(manifest)
+
+    def test_invalid_feature_level_raises(self, tmp_path: Path) -> None:
+        src = tmp_path / "doc.md"
+        src.write_text("# x")
+        manifest = tmp_path / "manifest.yaml"
+        manifest.write_text(
+            yaml.dump(
+                {
+                    "project": {"name": "X", "feature_level": "level9", "family": "article"},
+                    "sources": [{"path": "doc.md"}],
+                    "output": {"dir": "./dist"},
+                }
+            )
+        )
+        with pytest.raises(ManifestError, match="feature_level"):
+            load_manifest(manifest)
+
+    def test_invalid_family_raises(self, tmp_path: Path) -> None:
+        src = tmp_path / "doc.md"
+        src.write_text("# x")
+        manifest = tmp_path / "manifest.yaml"
+        manifest.write_text(
+            yaml.dump(
+                {
+                    "project": {"name": "X", "feature_level": "level1", "family": "unknown"},
+                    "sources": [{"path": "doc.md"}],
+                    "output": {"dir": "./dist"},
+                }
+            )
+        )
+        with pytest.raises(ManifestError, match="family"):
+            load_manifest(manifest)
+
+    def test_sources_resolved_relative_to_manifest(self, minimal_manifest_yaml: Path) -> None:
+        m = load_manifest(minimal_manifest_yaml)
+        assert m.sources[0].path.is_absolute()
+        assert m.sources[0].path.exists()
+
+    def test_output_dir_resolved(self, minimal_manifest_yaml: Path) -> None:
+        m = load_manifest(minimal_manifest_yaml)
+        assert m.output_dir.is_absolute()
+
+    def test_manifest_not_found_raises(self, tmp_path: Path) -> None:
+        with pytest.raises(ManifestError, match="not found"):
+            load_manifest(tmp_path / "nonexistent.yaml")